# Registrai: Arc ecosystem data (full reference)

Registrai, builder.registrai.cc, CC BY 4.0. Updated 2026-11-08 23:13 UTC.

Index of pages: https://builder.registrai.cc/llms.txt. Open data, refreshed daily: https://github.com/registrai-multichain/arc-ecosystem

# Methodology

Version 1.1 · 27 Oct 2026 · Data until 8 Nov 2026, 23:00 UTC

How Registrai defines and measures the figures on this site. Publishing principles: [How we publish](https://builder.registrai.cc/how-we-publish/). The indices: [Indices](https://builder.registrai.cc/builders-index/). API fields: [Data API](https://builder.registrai.cc/data-api/).

## Glossary

Parameter values are read from the method parameters the indices publish. Values as of 8 Nov 2026, 23:00 UTC.

**Payment**: A transfer of USDC or another registered stablecoin into one of an app's attributed contracts on Arc mainnet, counted by the index method.

**Paying wallet**: A distinct wallet that made at least one payment to the app within the period.

**New paying wallet**: A wallet paying the app that has not paid the app in the last 30 days, with a payment of at least $10; at most 25 count per app per hour.

**Received (USD)**: The USD value of payments; other stablecoins are converted at the ECB reference rate for their currency. Payments count up to $10,000 per wallet, per app, per hour.

**Attributed contract**: A contract Registrai assigns to an app: its own deployments, pools created by its factories, or a reviewed integration list.

**Index member**: An app included in an index: the Arc Builders Index (apps that started on Arc, plus the Arc base layer), the Arc Integrations Index (products that integrated Arc) or the Arc Ecosystem Index (both, plus the base layer).

**Index points**: Activity points that decay with a half-life of 21 days (about 0.137% an hour). Each payment earns log2(1 + c) + c / $100, where c is the USD it counts for (up to $10,000 per wallet, per app, per hour), plus 1 for a new paying wallet.

**Closed hour, data until**: Figures cover hours that have ended; "data until" is the end of the last closed hour (UTC).

**7-day window**: The 168 closed hours ending at "data until".

**Directory statuses**: Live: running on Arc mainnet, shown by mainnet evidence (contracts on Arc mainnet, an index id, an explorer link, the project's own mainnet support page, or an official Arc or Circle post saying it is live). Deployed: built on Arc but not yet open for use on mainnet, per its own docs or contracts. Announced: an announcement only, with no deployment we can show.

**Attributed share**: The share of USDC moved on Arc that went into index apps: USDC paid into the attributed contracts of Arc Ecosystem Index members (no per-wallet cap) ÷ the estimated USD value of all USDC transfers on Arc (mints and burns excluded), over the same days.

## Sources

Where each figure comes from, and how often it is refreshed.

| Source | What we take | How often |
| --- | --- | --- |
| Arc RPC (Blockdaemon, then rpc.mainnet.arc.io) | Blocks, token supplies, transfer logs | Live (Arc in numbers); hourly (indices) |
| Registrai indices (ABI, AII, AEI) | Per-app payments, wallets, USD | Hourly |
| DefiLlama | Arc TVL and stablecoins, always labelled "Source: DefiLlama" | Live, cached 10 min |
| Arc ecosystem directory | Project facts, each with its sources and evidence | Reviewed by hand; the review date is on each page |

## The attributed share

The share of USDC moved on Arc that went into index apps: USDC paid into the attributed contracts of Arc Ecosystem Index members (no per-wallet cap) ÷ the estimated USD value of all USDC transfers on Arc (mints and burns excluded), over the same days.

The all-USDC total is estimated from the first 240 blocks of each hour, scaled ×30, so one large transfer moves a one-day figure a lot; over 7 days it is steadier.

**Now:** 9.53% over 7 days to 8 Nov 2026 (daily 3.54–21.44%).

## Not for sale

No project can pay for its directory status, its place in an index, its position in any list or the wording of its page. Paid products (deeper API history and bulk exports via x402, not switched on yet, and the [AI visibility service](https://builder.registrai.cc/ai-reports/), powered by Recall, whose clients are listed on that page and on their own directory pages) sell data and analysis, never a change to these figures or facts.

Corrections follow the same public rules for every project, paying or not: [/ecosystem/corrections/](https://builder.registrai.cc/ecosystem/corrections/). Publishing principles: [How we publish](https://builder.registrai.cc/how-we-publish/).

## Known limits

- The all-USDC total is an estimate from sampled blocks.
- Active accounts on [/arc/](https://builder.registrai.cc/arc/) are not ours: they are the explorer's daily count of accounts that sent a transaction (Arc's Blockscout stats), for the last complete UTC day.
- Payments to contracts we have not attributed are not counted for any app.
- An hour the keeper misses is filled from the chain at the next close; if it cannot be, totals for that window are lower.
- Directory facts are as current as their review date; corrections are public at [/ecosystem/corrections/](https://builder.registrai.cc/ecosystem/corrections/).
- Other stablecoins are converted to USD, so "Received (USD)" is not USDC only.

## Changelog

- v1.1 (27 Oct 2026): added "Not for sale". Definitions unchanged.
- v1 (22 Oct 2026): first published version.

Source: https://builder.registrai.cc/methodology/ · Registrai, builder.registrai.cc, CC BY 4.0

# Arc in numbers

Arc is the layer-1 blockchain built by Circle. Generated 8 Nov 2026, 23:13 UTC; each figure gives its source and date.

## How much USDC is on Arc?

On 8 Nov 2026, 23:13 UTC, 1,297,503,551 USDC was on Arc, and 9,735,891 EURC, read from the token contracts. ([USDC contract](https://explorer.arc.io/address/0x3600000000000000000000000000000000000000), Arc RPC)

## What is the TVL on Arc?

Total value locked on Arc was $600,688,457 on 8 Nov 2026, according to DefiLlama. ([DefiLlama](https://defillama.com/chain/arc))

## How many daily transactions does Arc have?

Arc processed about 417,000 transactions in the 24 hours to 8 Nov 2026, 23:13 UTC, estimated from 240 sampled blocks. (Arc RPC) (i: Blocks 30,084,916 to 30,254,654, evenly spaced; the mean count per sampled block times the blocks in 24 h, rounded to the nearest 1,000.)

## How many active wallets are on Arc?

9,525 accounts sent at least one transaction on Arc on 7 Nov 2026 (UTC), according to Arc's block explorer. ([Arc explorer](https://explorer.arc.io/stats), Blockscout)

## How much do apps on Arc receive in stablecoin payments?

In the 24 hours to 8 Nov 2026, 23:00 UTC, apps on Arc tracked by Registrai received $15,020,169 in USDC payments across 67,936 payments. (Arc Ecosystem Index; per app: [Apps on Arc](https://builder.registrai.cc/apps/), [most-used apps](https://builder.registrai.cc/arc/most-used-apps/))

## Facts

- Circle launched the public Arc mainnet on 16 September 2026, after a private mainnet phase. ([source](https://www.circle.com/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet), 16 Sep 2026)
- USDC is Arc's native gas token. The native gas balance uses 18 decimals; the USDC ERC-20 interface at 0x3600…0000 uses 6 decimals. ([source](https://docs.arc.io/arc/references/contract-addresses), 16 Sep 2026)
- Arc is EVM-compatible and targets Ethereum's Osaka hard fork as its baseline, including EIP-7702. ([source](https://docs.arc.io/arc/references/evm-differences), 16 Sep 2026)
- Along with Circle, Arc's founding validators include BlackRock, DTCC, Galaxy, ICE, Mastercard, MoneyGram, SBI Group, Standard Chartered, Sumitomo Corporation, Visa and Worldpay, in a phased rollout. ([source](https://www.circle.com/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet), 16 Sep 2026)
- Arc's consensus uses Malachite, a Tendermint BFT implementation, with a permissioned proof-of-authority validator set. ([source](https://docs.arc.io/arc/concepts/consensus-layer), 16 Sep 2026)
- Circle said the network is exploring a future transition from proof of authority toward proof of stake in 2027. ([source](https://www.circle.com/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet), 16 Sep 2026)
- Circle completed the genesis mint of the ARC token, its full initial supply of 10 billion; it said this is not a commitment to publicly launch ARC, and fees remain payable in USDC. ([source](https://www.circle.com/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet), 16 Sep 2026)

One question per heading: [Arc blockchain: facts with sources](https://builder.registrai.cc/arc/facts/).

## Network

| Chain ID | 5042 | Arc docs |
| --- | --- | --- |
| Gas token | USDC | Arc docs |
| Mainnet since | 16 Sep 2026 | Circle press release |
| Block height | 30,254,654 | Arc RPC, 8 Nov 2026, 23:13 UTC |
| Average block time | 0.51 s | last 10,000 blocks |
| RPC | https://rpc.mainnet.arc.io | Arc docs |
| Explorer | https://explorer.arc.io | Arc docs |

## Stablecoins on Arc

| Token | Issuer | Contract | Supply on Arc | Source |
| --- | --- | --- | --- | --- |
| USDC | Circle | [`0x3600000000000000000000000000000000000000`](https://explorer.arc.io/address/0x3600000000000000000000000000000000000000) | 1,297,503,551 | [address](https://docs.arc.io/arc/references/contract-addresses) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| EURC | Circle | [`0xbef5f6d51cb62b58e6a8f77868681825c6fe21c1`](https://explorer.arc.io/address/0xbef5f6d51cb62b58e6a8f77868681825c6fe21c1) | 9,735,891 | [address](https://docs.arc.io/arc/references/contract-addresses) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| AUDD | Novatti | [`0xdec15d98d8c16d9ca2f8cc94ba4b88fe4f259393`](https://explorer.arc.io/address/0xdec15d98d8c16d9ca2f8cc94ba4b88fe4f259393) | 10 | [address](https://developers.circle.com/stablefx/references/supported-currencies) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| AUDF | Forte Securities Australia | [`0xd2a530170d71a9cfe1651fb468e2b98f7ed7456b`](https://explorer.arc.io/address/0xd2a530170d71a9cfe1651fb468e2b98f7ed7456b) | 301,000 | [address](https://developers.circle.com/stablefx/references/supported-currencies) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| BRLA | Avenia | [`0x75700e137c05b2beb2b3a436ccb551652e3d8b11`](https://explorer.arc.io/address/0x75700e137c05b2beb2b3a436ccb551652e3d8b11) | 101 | [address](https://developers.circle.com/stablefx/references/supported-currencies) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| CADD | CAD Digital | [`0x24bf8ae7b8e073d766a3509c25b45a6ad30e9046`](https://explorer.arc.io/address/0x24bf8ae7b8e073d766a3509c25b45a6ad30e9046) | 1 | [address](https://developers.circle.com/stablefx/references/supported-currencies) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| CHFAU | AllUnity | [`0xc6df1b92a6ae61a27059c41e541a91ce8dcb1605`](https://explorer.arc.io/address/0xc6df1b92a6ae61a27059c41e541a91ce8dcb1605) | 0 | [address](https://developers.circle.com/stablefx/references/supported-currencies) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| EURAU | AllUnity | [`0x4933a85b5b5466fbaf179f72d3de273c287ec2c2`](https://explorer.arc.io/address/0x4933a85b5b5466fbaf179f72d3de273c287ec2c2) | 0 | [address](https://developers.circle.com/stablefx/references/supported-currencies) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| GBPA | Agant | [`0xbbe6aab0ed76e90aea0d1cd978ec231c8adcdf8b`](https://explorer.arc.io/address/0xbbe6aab0ed76e90aea0d1cd978ec231c8adcdf8b) | 575,213 | [address](https://developers.circle.com/stablefx/references/supported-currencies) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| JPYC | JPYC | [`0xe7c3d8c9a439fede00d2600032d5db0be71c3c29`](https://explorer.arc.io/address/0xe7c3d8c9a439fede00d2600032d5db0be71c3c29) | 0 | [address](https://developers.circle.com/stablefx/references/supported-currencies) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| KRW1 | BDACS | [`0x303dbb88ba14626c7a927e983b73267c575315f7`](https://explorer.arc.io/address/0x303dbb88ba14626c7a927e983b73267c575315f7) | 500,000 | [address](https://developers.circle.com/stablefx/references/supported-currencies) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| MXNB | Bitso | [`0xf197ffc28c23e0309b5559e7a166f2c6164c80aa`](https://explorer.arc.io/address/0xf197ffc28c23e0309b5559e7a166f2c6164c80aa) | 1,198,977 | [address](https://developers.circle.com/stablefx/references/supported-currencies) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| QCAD | Canada Stablecorp | [`0xd70c2fa4232e054b373efaea98e4138511c2a309`](https://explorer.arc.io/address/0xd70c2fa4232e054b373efaea98e4138511c2a309) | 500 | [address](https://developers.circle.com/stablefx/references/supported-currencies) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| SEKAU | AllUnity | [`0xf8524b5ab17d5eca2f78abe8377ceffd323b1dc1`](https://explorer.arc.io/address/0xf8524b5ab17d5eca2f78abe8377ceffd323b1dc1) | 0 | [address](https://developers.circle.com/stablefx/references/supported-currencies) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| TRYB | Bilira | [`0xfb0705023603dc86325b83d9ff6b0da7921fec17`](https://explorer.arc.io/address/0xfb0705023603dc86325b83d9ff6b0da7921fec17) | 4,428,178 | [address](https://developers.circle.com/stablefx/references/supported-currencies) · Arc RPC, 8 Nov 2026, 23:13 UTC |
| ZARU | Luno | [`0xe205b4e7ac03e3f7b2060c3edf2171aa7126c0d5`](https://explorer.arc.io/address/0xe205b4e7ac03e3f7b2060c3edf2171aa7126c0d5) | 1,000,000 | [address](https://developers.circle.com/stablefx/references/supported-currencies) · Arc RPC, 8 Nov 2026, 23:13 UTC |

| All stablecoins, circulating (USD value) | $1,292,570,638 | Source: DefiLlama, 8 Nov 2026 |
| --- | --- | --- |
| TVL | $600,688,457 | Source: DefiLlama, 8 Nov 2026 |

(i: DefiLlama counts the circulating supply of every stablecoin on Arc (all pegs, in USD); it can differ from the token contracts' totalSupply shown above.)

## Activity, last 24 h

Data until 8 Nov 2026, 23:00 UTC · Source: Arc Ecosystem Index (Registrai) (i: Stablecoin transfers on Arc in the last 24 h, estimated from sampled hours by the Arc Ecosystem Index; tracked apps = transfers into contracts the index attributes to an app.)

| USDC moved on Arc (estimate) | $204,579,719 | |
| --- | --- | --- |
| EURC moved on Arc, in USD (estimate) | $4,905,887 | |
| USDC transfers (estimate) | 425,190 | |
| Transactions (estimate) | 417,000 | Arc RPC, sampled blocks |
| Active accounts, 7 Nov 2026 | 9,525 | Arc explorer (Blockscout): accounts that sent a transaction |
| Payments to tracked apps | 67,936 | |
| USDC to tracked apps | $15,020,169 | |
| Share attributed to apps | 9.53% over 7 days to 8 Nov 2026 (daily 3.54–21.44%) [Method](https://builder.registrai.cc/methodology/#attributed-share) | |

## Ecosystem

[297 projects](https://builder.registrai.cc/ecosystem/) in the Arc ecosystem directory: 142 live on mainnet, 21 deployed, 134 announced.

- [Payment apps on Arc](https://builder.registrai.cc/ecosystem/payments/): 51
- [Infrastructure for Arc](https://builder.registrai.cc/ecosystem/infrastructure/): 29
- [DEXs on Arc](https://builder.registrai.cc/ecosystem/dexs/): 27
- [Launchpads on Arc](https://builder.registrai.cc/ecosystem/launchpads/): 27
- [Wallets that support Arc](https://builder.registrai.cc/ecosystem/wallets/): 27
- [Exchanges that support Arc](https://builder.registrai.cc/ecosystem/exchanges/): 20

Apps in the [Arc indices](https://builder.registrai.cc/builders-index/): ABI 19 · AII 23 · AEI 42. Closes: ABI 961.14 · AII 867.51 · AEI 899.52 (8 Nov 2026, 23:00 UTC).

## Timeline

- 28 Oct 2025: Arc public testnet launched ([source](https://www.arc.io/pressroom/circle-launches-arc-public-testnet))
- 5 Aug 2026: Founding validator cohort announced ([source](https://www.arc.io/pressroom/circle-announces-founding-validator-cohort-and-major-integrations-for-arc-ahead-of-september-16-mainnet-launch))
- 16 Sep 2026: Arc mainnet launched ([source](https://www.arc.io/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet))

## Questions

- [Most-used apps on Arc, last 7 days](https://builder.registrai.cc/arc/most-used-apps/)
- [Apps that accept USDC on Arc](https://builder.registrai.cc/arc/apps-that-accept-usdc/)
- [New on Arc, last 30 days](https://builder.registrai.cc/arc/new/)
- [How to get USDC onto Arc](https://builder.registrai.cc/arc/get-usdc/)
- [Arc vs Ethereum vs Solana for stablecoin payments](https://builder.registrai.cc/arc/arc-vs-ethereum-vs-solana/)
- [Arc blockchain: facts with sources](https://builder.registrai.cc/arc/facts/)
- [Arc developer reference](https://builder.registrai.cc/arc/developers/)

## Weekly reports

- [Apps built with Arc Studio](https://builder.registrai.cc/arc/studio/)
- [AI answers about Arc](https://builder.registrai.cc/arc/ai-answers/)

## History

| Snapshot | USDC supply | All stablecoins | TVL | USDC moved, 24 h (est.) | Attributed to apps, 24 h | Transactions, 24 h (est.) |
| --- | --- | --- | --- | --- | --- | --- |
| 8 Nov 2026, 00:05 UTC | 1,284,286,406 USDC | $1,294,471,289 | $600,458,163 | $144,123,922 | 11.5% | 357,000 |
| 7 Nov 2026, 00:06 UTC | 1,286,420,280 USDC | $1,194,980,648 | $603,672,358 | $360,207,584 | 6.19% | 708,000 |
| 6 Nov 2026, 00:05 UTC | 1,186,725,980 USDC | $1,202,657,314 | $595,062,021 | $494,431,560 | 21.44% | 848,000 |
| 5 Nov 2026, 00:05 UTC | 1,194,186,464 USDC | $1,157,422,288 | $644,022,431 | $487,381,658 | 13.14% | 755,000 |
| 4 Nov 2026, 00:05 UTC | 1,148,358,164 USDC | $1,114,499,205 | $602,242,689 | $963,247,709 | 6.6% | 556,000 |
| 3 Nov 2026, 00:05 UTC | 1,108,083,675 USDC | $1,097,742,025 | $570,687,818 | $655,017,192 | 3.54% | 739,000 |
| 2 Nov 2026, 00:05 UTC | 1,089,147,527 USDC | $1,097,073,004 | $574,128,138 | $152,305,283 | 9.69% | 483,000 |
| 1 Nov 2026, 00:04 UTC | 1,086,010,638 USDC | $1,115,091,941 | $586,266,893 | $177,830,916 | 8.05% | 371,000 |
| 31 Oct 2026, 00:04 UTC | 1,104,304,129 USDC | $1,081,758,076 | $573,045,840 | $618,358,794 | 13.33% | 641,000 |
| 30 Oct 2026, 00:04 UTC | 1,071,709,599 USDC | $1,102,463,961 | $617,392,454 | $742,183,373 | 5.67% | 555,000 |
| 29 Oct 2026, 00:04 UTC | 1,092,607,631 USDC | $1,021,872,647 | $612,703,582 | $649,917,572 | 4.59% | 463,000 |
| 28 Oct 2026, 00:04 UTC | 1,009,755,500 USDC | $993,811,787 | $625,396,579 | $515,532,082 | 6.95% | 406,000 |
| 27 Oct 2026, 00:04 UTC | 979,934,277 USDC | $962,523,927 | $626,070,258 | $421,641,035 | 5.31% | 562,000 |
| 26 Oct 2026, 00:03 UTC | 956,239,121 USDC | $914,192,128 | $630,273,819 | $245,908,133 | 6.78% | 400,000 |
| 25 Oct 2026, 00:03 UTC | 904,890,073 USDC | $924,488,487 | $628,517,400 | $176,546,084 | 9.12% | 441,000 |
| 24 Oct 2026, 00:03 UTC | 915,744,128 USDC | $830,446,976 | $632,185,124 | $549,004,268 | 3.06% | 359,000 |
| 23 Oct 2026, 00:03 UTC | 820,451,380 USDC | $713,873,499 | $635,882,560 | $603,013,124 | 5.58% | – |
| 22 Oct 2026, 00:03 UTC | 705,278,239 USDC | $781,523,258 | $537,044,937 | $1,293,125,114 | 1.04% | – |
| 21 Oct 2026, 00:03 UTC | 772,831,184 USDC | $750,772,867 | $532,644,338 | $330,361,073 | 3.93% | – |

JSON: [/api/v1/arc](https://builder.registrai.cc/api/v1/arc) · [/api/v1/arc/daily](https://builder.registrai.cc/api/v1/arc/daily). Registrai figures CC BY 4.0; DefiLlama figures as labelled.

Source: https://builder.registrai.cc/arc/ · Registrai, builder.registrai.cc, CC BY 4.0

# Most-used apps on Arc, last 7 days

In the 7 days to 8 Nov 2026, 23:00 UTC, Uniswap received the most in stablecoin payments of the 33 apps with payments in Registrai's Arc index: $48,545,895.56.

| # | App | Category | Received (USD) | Payments | New paying wallets |
| --- | --- | --- | --- | --- | --- |
| 1 | [Uniswap](https://builder.registrai.cc/ecosystem/uniswap/) | DEXs | $48,545,895.56 | 435,537 | 3,268 |
| 2 | [KyberSwap](https://builder.registrai.cc/ecosystem/kyberswap/) | DEXs | $3,937,934.71 | 9,598 | 58 |
| 3 | [Morpho](https://builder.registrai.cc/ecosystem/morpho/) | Lending | $2,564,444.41 | 3,204 | 74 |
| 4 | [Archery](https://builder.registrai.cc/ecosystem/archery/) | DEXs | $2,146,732.47 | 12,271 | 19 |
| 5 | [0x](https://builder.registrai.cc/ecosystem/0x/) | DEXs | $1,753,540.05 | 5,098 | 222 |
| 6 | [Relay](https://builder.registrai.cc/ecosystem/relay/) | Bridges and cross-chain | $1,533,731.64 | 9,328 | 1,147 |
| 7 | [rhino.fi](https://builder.registrai.cc/ecosystem/rhino-fi/) | Bridges and cross-chain | $1,476,789.87 | 2,391 | 70 |
| 8 | [LI.FI](https://builder.registrai.cc/ecosystem/li-fi/) | Bridges and cross-chain | $1,300,362.57 | 9,556 | 289 |
| 9 | [OKX Wallet](https://builder.registrai.cc/ecosystem/okx-wallet/) | Wallets | $638,030.71 | 4,815 | 249 |
| 10 | [1inch](https://builder.registrai.cc/ecosystem/1inch/) | DEXs | $537,107.76 | 737 | 18 |
| 11 | [Across](https://builder.registrai.cc/ecosystem/across/) | Bridges and cross-chain | $502,093.88 | 1,859 | 300 |
| 12 | [Bungee](https://builder.registrai.cc/ecosystem/bungee/) | Bridges and cross-chain | $301,572.75 | 973 | 24 |
| 13 | [Aave](https://builder.registrai.cc/ecosystem/aave/) | Lending | $292,036.31 | 289 | 33 |
| 14 | [MetaMask](https://builder.registrai.cc/ecosystem/metamask/) | Wallets | $173,606.73 | 689 | 287 |
| 15 | [Rango](https://builder.registrai.cc/ecosystem/rango/) | Bridges and cross-chain | $57,508.35 | 189 | 60 |
| 16 | [Steakhouse Financial](https://builder.registrai.cc/ecosystem/steakhouse-financial/) | Lending | $56,039.03 | 267 | 0 |
| 17 | [Peach](https://builder.registrai.cc/ecosystem/peach/) | DEXs | $26,776.77 | 14,751 | 6 |
| 18 | [Argus World](https://builder.registrai.cc/ecosystem/argus/) | Launchpads | $25,097.81 | 274 | 14 |
| 19 | [Synthra](https://builder.registrai.cc/ecosystem/synthra/) | DEXs | $7,693.61 | 316 | 5 |
| 20 | [DYOR Swap](https://builder.registrai.cc/ecosystem/dyor-swap/) | DEXs | $2,262.77 | 647 | 0 |
| 21 | [UnitFlow Finance](https://builder.registrai.cc/ecosystem/unitflow-finance/) | DEXs | $2,146.17 | 4,369 | 1 |
| 22 | [Tolly](https://builder.registrai.cc/ecosystem/tolly/) | Launchpads | $2,082.86 | 210 | 0 |
| 23 | [ArcTools](https://builder.registrai.cc/ecosystem/arctools/) | Trading | $841.91 | 10,154 | 0 |
| 24 | [Arctide](https://builder.registrai.cc/ecosystem/arctide/) | DEXs | $713.97 | 18 | 4 |
| 25 | [OpenSea](https://builder.registrai.cc/ecosystem/opensea/) | Games and NFTs | $694.13 | 88 | 6 |
| 26 | [UBI.fun](https://builder.registrai.cc/ecosystem/ubi-fun/) | Launchpads | $669.59 | 443 | 0 |
| 27 | [LayerZero](https://builder.registrai.cc/ecosystem/layerzero/) | Bridges and cross-chain | $239.00 | 589 | 0 |
| 28 | [Astock](https://builder.registrai.cc/ecosystem/arcstocks/) | Tokenization and RWA | $200.82 | 14 | 5 |
| 29 | [Lift](https://builder.registrai.cc/ecosystem/lift/) | Launchpads | $91.72 | 13 | 0 |
| 30 | [Chainlink](https://builder.registrai.cc/ecosystem/chainlink/) | Infrastructure | $21.50 | 13 | 0 |
| 31 | [BlockRun](https://builder.registrai.cc/ecosystem/blockrun/) | AI agents | $20.43 | 93 | 0 |
| 32 | [Foci](https://builder.registrai.cc/ecosystem/foci/) | Launchpads | $8.63 | 6 | 0 |
| 33 | [Aero](https://builder.registrai.cc/ecosystem/aerodrome/) | DEXs | $3.42 | 2 | 0 |

Source: Arc Ecosystem Index (Registrai), hourly, 7 days to 8 Nov 2026, 23:00 UTC. (i: Payments into each app's contracts in USDC and other registered stablecoins, converted to USD, as attributed by the Arc Ecosystem Index. New paying wallets: wallets that have not paid the app in the last 30 days. [Method](https://builder.registrai.cc/methodology/#received-usd))

[Arc in numbers](https://builder.registrai.cc/arc/) · [Arc ecosystem](https://builder.registrai.cc/ecosystem/)

Source: https://builder.registrai.cc/arc/most-used-apps/ · Registrai, builder.registrai.cc, CC BY 4.0

# Apps that accept USDC on Arc

15 payment apps in Registrai's directory take USDC on Arc mainnet, including Arc Spend, Catena Labs and Cycles. Separately, 33 apps on Arc received stablecoin payments in the 7 days to 8 Nov 2026, 23:00 UTC, led by Uniswap.

## Payment apps live on Arc

| Project | What it does on Arc | Live since | Evidence |
| --- | --- | --- | --- |
| [Arc Spend](https://builder.registrai.cc/ecosystem/arc-spend/) | Independent web app that sells Bitrefill gift cards for USDC on Arc. | – | [Evidence](https://arcspend.vercel.app/) |
| [Catena Labs](https://builder.registrai.cc/ecosystem/catena-labs/) | Banking and governance platform for AI agents, covering payments and treasury. | 2026-09-16 | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Cycles](https://builder.registrai.cc/ecosystem/cycles/) | Open clearing protocol that lets users clear debts with each other using any currency or credit. | – | [Evidence](https://www.arc.io/ecosystem/cycles) |
| [Fast](https://builder.registrai.cc/ecosystem/fast/) | Payments network for people and AI agents; its AllSet bridge moves USDC between EVM chains and Fast. | – | [Evidence](https://github.com/fastxyz/fast-sdk/blob/main/app/cli/src/config/networks.ts) |
| [Glidepay](https://builder.registrai.cc/ecosystem/glidepay/) | Cash App-style stablecoin app on Arc with email or Google sign-in and Circle developer-controlled smart accounts (Circle holds the keys). | 2026-09-24 | [Evidence](https://glidepay.cash/mainnet) |
| [HIFI](https://builder.registrai.cc/ecosystem/hifi/) | API platform for moving money across fiat rails and stablecoins, covering cross-border payments, payouts and stablecoin minting. | 2026-09-18 | [Evidence](https://www.arc.io/ecosystem/hifi) |
| [HumanLayer](https://builder.registrai.cc/ecosystem/humanlayer/) | USDC bounty marketplace: buyers post research and data tasks, escrow the reward and pay workers when a submission is approved, with a 2%… | 2026-10-30 | [Evidence](https://explorer.arc.io/address/0x43762d26a9c035d70c04d3cef58db46227073e1e) |
| [Meter](https://builder.registrai.cc/ecosystem/meter/) | Pay-per-call API gateway: a caller pays a registered endpoint in USDC through the MeterRegistry contract and sends the transaction hash as… | 2026-10-26 | [Evidence](https://explorer.arc.io/address/0x423b8701da3a251a3a3fc2d241b71e8d05744c91) |
| [Pulsar](https://builder.registrai.cc/ecosystem/pulsar/) | Non-custodial consumer money app covering dollar, euro and pound balances, bank and stablecoin transfers, swaps and card spending. | 2026-09-16 | [Evidence](https://www.arc.io/blog/how-pulsar-is-building-a-cross-border-money-experience-with-arc) |
| [Splitty](https://builder.registrai.cc/ecosystem/splitty/) | Batch USDC payments: send USDC or any ERC-20 on Arc to many wallets in one transaction, funded from other chains through Circle Gateway. | 2026-09-22 | [Evidence](https://explorer.arc.io/address/0x941e49c0cf2f76cc4f79d9fd1e4a892893e90032) |
| [Syn DAO](https://builder.registrai.cc/ecosystem/syn-dao/) | USDC treasury, governance and milestone-escrow platform on Arc for organizations, creators and AI agents. | – | [Evidence](https://www.syndaopro.xyz/) |
| [UQPay](https://builder.registrai.cc/ecosystem/uqpay/) | Payments platform offering global acquiring, multi-currency accounts, card issuance and stablecoin services. | 2026-09-16 | [Evidence](https://www.uqpay.com/en) |
| [WalletConnect Pay](https://builder.registrai.cc/ecosystem/walletconnect-pay/) | WalletConnect's crypto payment product for merchants and PSPs. | 2026-09-16 | [Evidence](https://walletconnect.com/blog/the-walletconnect-network-supports-arc-connecting-apps-from-day-one) |
| [Wirex](https://builder.registrai.cc/ecosystem/wirex/) | Crypto wallet and payment platform with cards, exchange and global transfers, plus a business offering for stablecoin accounts and cards. | 2026-09-16 | [Evidence](https://www.arc.io/pressroom/circle-announces-founding-validator-cohort-and-major-integrations-for-arc-ahead-of-september-16-mainnet-launch) |
| [WizPay](https://builder.registrai.cc/ecosystem/wizpay/) | Non-custodial stablecoin payments app on Arc for sends, payroll, invoices and payment links, USDC/EURC swaps and CCTP V2 bridging. | – | [Evidence](https://wizpay.xyz/#mainnet-contracts) |

## Announced

| Project | Status | Evidence |
| --- | --- | --- |
| [Eco](https://builder.registrai.cc/ecosystem/eco/) | Deployed | [Evidence](https://github.com/eco/routes-cli/pull/30) |
| [Hinkal](https://builder.registrai.cc/ecosystem/hinkal/) | Deployed | [Evidence](https://defillama.com/protocol/hinkal) |
| [Alfred Pay](https://builder.registrai.cc/ecosystem/alfred-pay/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet) |
| [BVNK](https://builder.registrai.cc/ecosystem/bvnk/) | Announced | [Evidence](https://www.arc.io/blog/arc-economic-os-internet) |
| [Brex](https://builder.registrai.cc/ecosystem/brex/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Bridge](https://builder.registrai.cc/ecosystem/bridge/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Careem](https://builder.registrai.cc/ecosystem/careem/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Copperx](https://builder.registrai.cc/ecosystem/copperx/) | Announced | [Evidence](https://www.arc.io/ecosystem/copperx) |
| [Corpay](https://builder.registrai.cc/ecosystem/corpay/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Digital Garage](https://builder.registrai.cc/ecosystem/digital-garage/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet) |
| [Dmall](https://builder.registrai.cc/ecosystem/dmall/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Ebanx](https://builder.registrai.cc/ecosystem/ebanx/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [FIS](https://builder.registrai.cc/ecosystem/fis/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Fiserv](https://builder.registrai.cc/ecosystem/fiserv/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Fun.xyz](https://builder.registrai.cc/ecosystem/fun-xyz/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Global Payments](https://builder.registrai.cc/ecosystem/global-payments/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-announces-founding-validator-cohort-and-major-integrations-for-arc-ahead-of-september-16-mainnet-launch) |
| [Hecto Financial](https://builder.registrai.cc/ecosystem/hecto-financial/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [JCB](https://builder.registrai.cc/ecosystem/jcb/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet) |
| [LianLian](https://builder.registrai.cc/ecosystem/lianlian/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Mastercard](https://builder.registrai.cc/ecosystem/mastercard/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-announces-founding-validator-cohort-and-major-integrations-for-arc-ahead-of-september-16-mainnet-launch) |
| [Mercoin](https://builder.registrai.cc/ecosystem/mercoin/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [MoneyGram](https://builder.registrai.cc/ecosystem/moneygram/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-announces-founding-validator-cohort-and-major-integrations-for-arc-ahead-of-september-16-mainnet-launch) |
| [Noah](https://builder.registrai.cc/ecosystem/noah/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet) |
| [Nuvei](https://builder.registrai.cc/ecosystem/nuvei/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [OwlPay](https://builder.registrai.cc/ecosystem/owlpay/) | Announced | [Evidence](https://www.arc.io/ecosystem/owlpay) |
| [Pairpoint by Vodafone](https://builder.registrai.cc/ecosystem/pairpoint-by-vodafone/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Paysafe](https://builder.registrai.cc/ecosystem/paysafe/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [PhotonPay](https://builder.registrai.cc/ecosystem/photonpay/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Rain](https://builder.registrai.cc/ecosystem/rain/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-announces-founding-validator-cohort-and-major-integrations-for-arc-ahead-of-september-16-mainnet-launch) |
| [Ramp](https://builder.registrai.cc/ecosystem/ramp/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Sasai Fintech](https://builder.registrai.cc/ecosystem/sasai-fintech/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Tazapay](https://builder.registrai.cc/ecosystem/tazapay/) | Announced | [Evidence](https://www.arc.io/blog/arc-economic-os-internet) |
| [Thunes](https://builder.registrai.cc/ecosystem/thunes/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-announces-founding-validator-cohort-and-major-integrations-for-arc-ahead-of-september-16-mainnet-launch) |
| [Visa](https://builder.registrai.cc/ecosystem/visa/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-announces-founding-validator-cohort-and-major-integrations-for-arc-ahead-of-september-16-mainnet-launch) |
| [Yellow Card](https://builder.registrai.cc/ecosystem/yellow-card/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [dLocal](https://builder.registrai.cc/ecosystem/dlocal/) | Announced | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |

Source: Registrai Arc ecosystem directory; each status links its evidence. Last reviewed 2026-11-01.

## Receiving stablecoin payments, last 7 days

Measured payments into apps' contracts on Arc. These include swaps into DEXs and bridges, which receive USDC as part of a trade, not only purchases.

| App | Category | Payments (7 d) | Received (USD, 7 d) |
| --- | --- | --- | --- |
| [Uniswap](https://builder.registrai.cc/ecosystem/uniswap/) | DEXs | 435,537 | $48,545,895.56 |
| [KyberSwap](https://builder.registrai.cc/ecosystem/kyberswap/) | DEXs | 9,598 | $3,937,934.71 |
| [Morpho](https://builder.registrai.cc/ecosystem/morpho/) | Lending | 3,204 | $2,564,444.41 |
| [Archery](https://builder.registrai.cc/ecosystem/archery/) | DEXs | 12,271 | $2,146,732.47 |
| [0x](https://builder.registrai.cc/ecosystem/0x/) | DEXs | 5,098 | $1,753,540.05 |
| [Relay](https://builder.registrai.cc/ecosystem/relay/) | Bridges and cross-chain | 9,328 | $1,533,731.64 |
| [rhino.fi](https://builder.registrai.cc/ecosystem/rhino-fi/) | Bridges and cross-chain | 2,391 | $1,476,789.87 |
| [LI.FI](https://builder.registrai.cc/ecosystem/li-fi/) | Bridges and cross-chain | 9,556 | $1,300,362.57 |
| [OKX Wallet](https://builder.registrai.cc/ecosystem/okx-wallet/) | Wallets | 4,815 | $638,030.71 |
| [1inch](https://builder.registrai.cc/ecosystem/1inch/) | DEXs | 737 | $537,107.76 |
| [Across](https://builder.registrai.cc/ecosystem/across/) | Bridges and cross-chain | 1,859 | $502,093.88 |
| [Bungee](https://builder.registrai.cc/ecosystem/bungee/) | Bridges and cross-chain | 973 | $301,572.75 |
| [Aave](https://builder.registrai.cc/ecosystem/aave/) | Lending | 289 | $292,036.31 |
| [MetaMask](https://builder.registrai.cc/ecosystem/metamask/) | Wallets | 689 | $173,606.73 |
| [Rango](https://builder.registrai.cc/ecosystem/rango/) | Bridges and cross-chain | 189 | $57,508.35 |
| [Steakhouse Financial](https://builder.registrai.cc/ecosystem/steakhouse-financial/) | Lending | 267 | $56,039.03 |
| [Peach](https://builder.registrai.cc/ecosystem/peach/) | DEXs | 14,751 | $26,776.77 |
| [Argus World](https://builder.registrai.cc/ecosystem/argus/) | Launchpads | 274 | $25,097.81 |
| [Synthra](https://builder.registrai.cc/ecosystem/synthra/) | DEXs | 316 | $7,693.61 |
| [DYOR Swap](https://builder.registrai.cc/ecosystem/dyor-swap/) | DEXs | 647 | $2,262.77 |
| [UnitFlow Finance](https://builder.registrai.cc/ecosystem/unitflow-finance/) | DEXs | 4,369 | $2,146.17 |
| [Tolly](https://builder.registrai.cc/ecosystem/tolly/) | Launchpads | 210 | $2,082.86 |
| [ArcTools](https://builder.registrai.cc/ecosystem/arctools/) | Trading | 10,154 | $841.91 |
| [Arctide](https://builder.registrai.cc/ecosystem/arctide/) | DEXs | 18 | $713.97 |
| [OpenSea](https://builder.registrai.cc/ecosystem/opensea/) | Games and NFTs | 88 | $694.13 |
| [UBI.fun](https://builder.registrai.cc/ecosystem/ubi-fun/) | Launchpads | 443 | $669.59 |
| [LayerZero](https://builder.registrai.cc/ecosystem/layerzero/) | Bridges and cross-chain | 589 | $239.00 |
| [Astock](https://builder.registrai.cc/ecosystem/arcstocks/) | Tokenization and RWA | 14 | $200.82 |
| [Lift](https://builder.registrai.cc/ecosystem/lift/) | Launchpads | 13 | $91.72 |
| [Chainlink](https://builder.registrai.cc/ecosystem/chainlink/) | Infrastructure | 13 | $21.50 |
| [BlockRun](https://builder.registrai.cc/ecosystem/blockrun/) | AI agents | 93 | $20.43 |
| [Foci](https://builder.registrai.cc/ecosystem/foci/) | Launchpads | 6 | $8.63 |
| [Aero](https://builder.registrai.cc/ecosystem/aerodrome/) | DEXs | 2 | $3.42 |

Source: Arc Ecosystem Index (Registrai), hourly, 7 days to 8 Nov 2026, 23:00 UTC. (i: Payments into each app's contracts in USDC and other registered stablecoins, converted to USD, as attributed by the Arc Ecosystem Index. New paying wallets: wallets that have not paid the app in the last 30 days. [Method](https://builder.registrai.cc/methodology/#received-usd))

[Arc in numbers](https://builder.registrai.cc/arc/) · [Arc ecosystem](https://builder.registrai.cc/ecosystem/)

Source: https://builder.registrai.cc/arc/apps-that-accept-usdc/ · Registrai, builder.registrai.cc, CC BY 4.0

# New on Arc, last 30 days

In the 30 days to 8 Nov 2026, 5 projects in the directory went live on Arc. In the 7 days to 8 Nov 2026, 23:00 UTC, no app was added to Registrai's index.

## Went live

| Project | Category | Live since |
| --- | --- | --- |
| [BEACON Oracle](https://builder.registrai.cc/ecosystem/beacon-oracle/) | Infrastructure | 2026-10-29 |
| [Extended](https://builder.registrai.cc/ecosystem/extended/) | Trading | 2026-10-22 |
| [HumanLayer](https://builder.registrai.cc/ecosystem/humanlayer/) | AI agents | 2026-10-30 |
| [Meter](https://builder.registrai.cc/ecosystem/meter/) | Payments | 2026-10-26 |
| [PredictAgent](https://builder.registrai.cc/ecosystem/predictagent/) | AI agents | 2026-10-17 |

Source: Registrai Arc ecosystem directory; each status links its evidence. Last reviewed 2026-11-01.

## Added to Registrai's index, last 7 days

None in the last 7 days.

Source: Arc Ecosystem Index (Registrai), hourly, 7 days to 8 Nov 2026, 23:00 UTC. (i: Payments into each app's contracts in USDC and other registered stablecoins, converted to USD, as attributed by the Arc Ecosystem Index. New paying wallets: wallets that have not paid the app in the last 30 days. [Method](https://builder.registrai.cc/methodology/#received-usd))

[Arc in numbers](https://builder.registrai.cc/arc/) · [Arc ecosystem](https://builder.registrai.cc/ecosystem/)

Source: https://builder.registrai.cc/arc/new/ · Registrai, builder.registrai.cc, CC BY 4.0

# How to get USDC onto Arc

USDC reaches Arc three ways: buy it through an on-ramp, withdraw it from an exchange that supports the Arc network, or bridge it from another chain.

## On-ramps

| Project | Status | Evidence |
| --- | --- | --- |
| [MoonPay](https://builder.registrai.cc/ecosystem/moonpay/) | Live on mainnet | [Evidence](https://api.moonpay.com/v3/currencies) |

Announced: [Ramp Network](https://builder.registrai.cc/ecosystem/ramp-network/), [Transak](https://builder.registrai.cc/ecosystem/transak/)

## Exchanges

| Project | Status | Evidence |
| --- | --- | --- |
| [Backpack](https://builder.registrai.cc/ecosystem/backpack/) | Live on mainnet | [Evidence](https://api.backpack.exchange/api/v1/assets) |
| [Binance](https://builder.registrai.cc/ecosystem/binance/) | Live on mainnet | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet) |
| [Bitget](https://builder.registrai.cc/ecosystem/bitget/) | Live on mainnet | [Evidence](https://www.bitget.com/support/articles/12560603895329) |
| [Bitrue](https://builder.registrai.cc/ecosystem/bitrue/) | Live on mainnet | [Evidence](https://www.arc.io/ecosystem/bitrue) |
| [Bitso](https://builder.registrai.cc/ecosystem/bitso/) | Live on mainnet | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet) |
| [Bitvavo](https://builder.registrai.cc/ecosystem/bitvavo/) | Live on mainnet | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) |
| [Bybit](https://builder.registrai.cc/ecosystem/bybit/) | Live on mainnet | [Evidence](https://announcements.bybit.com/en/article/bybit-launches-usdc-on-arc-chain-zero-fees-lucky-draws-and-high-yield-staking--artb5ebbf5e2327/) |
| [Gate](https://builder.registrai.cc/ecosystem/gate/) | Live on mainnet | [Evidence](https://www.gate.com/announcements/article/101771) |
| [Kraken](https://builder.registrai.cc/ecosystem/kraken/) | Live on mainnet | [Evidence](https://blog.kraken.com/product/new-features/usdc-on-arc-deposits-and-withdrawals-now-available) |
| [KuCoin](https://builder.registrai.cc/ecosystem/kucoin/) | Live on mainnet | [Evidence](https://www.kucoin.com/announcement/en-usdc-on-arc-mainnet-is-now-supported-on-kucoin) |
| [LBank](https://builder.registrai.cc/ecosystem/lbank/) | Live on mainnet | [Evidence](https://www.arc.io/ecosystem/lbank) |
| [MEXC](https://builder.registrai.cc/ecosystem/mexc/) | Live on mainnet | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet) |
| [OKX](https://builder.registrai.cc/ecosystem/okx/) | Live on mainnet | [Evidence](https://www.okx.com/en-us/help/okx-to-support-usdc-on-the-arc-chain) |
| [OSL](https://builder.registrai.cc/ecosystem/osl/) | Live on mainnet | [Evidence](https://www.kucoin.com/news/flash/osl-global-adds-support-for-usdc-deposits-and-withdrawals-on-arc-network) |
| [Upbit](https://builder.registrai.cc/ecosystem/upbit/) | Live on mainnet | [Evidence](https://www.arc.io/pressroom/circle-announces-founding-validator-cohort-and-major-integrations-for-arc-ahead-of-september-16-mainnet-launch) |
| [Wenia](https://builder.registrai.cc/ecosystem/wenia/) | Live on mainnet | [Evidence](https://www.arc.io/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet) |

Announced: [Coinbase](https://builder.registrai.cc/ecosystem/coinbase/), [Coincheck](https://builder.registrai.cc/ecosystem/coincheck/), [Hashkey](https://builder.registrai.cc/ecosystem/hashkey/), [Robinhood](https://builder.registrai.cc/ecosystem/robinhood/)

## Bridges

| Project | Status | Evidence |
| --- | --- | --- |
| [Across](https://builder.registrai.cc/ecosystem/across/) | Live on mainnet | [Evidence](https://across.to/blog/arc-on-across) |
| [Aleo](https://builder.registrai.cc/ecosystem/aleo/) | Live on mainnet | [Evidence](https://developers.circle.com/release-notes/xreserve-2026) |
| [Bungee](https://builder.registrai.cc/ecosystem/bungee/) | Live on mainnet | [Evidence](https://github.com/SocketDotTech/openrouter/blob/main/deployments.csv) |
| [Circle Gateway](https://builder.registrai.cc/ecosystem/circle-gateway/) | Live on mainnet | [Evidence](https://explorer.arc.io/address/0x77777777dcc4d5a8b6e418fd04d8997ef11000ee) |
| [Eco](https://builder.registrai.cc/ecosystem/eco/) | Deployed | [Evidence](https://github.com/eco/routes-cli/pull/30) |
| [Fast](https://builder.registrai.cc/ecosystem/fast/) | Live on mainnet | [Evidence](https://github.com/fastxyz/fast-sdk/blob/main/app/cli/src/config/networks.ts) |
| [LayerZero](https://builder.registrai.cc/ecosystem/layerzero/) | Live on mainnet | [Evidence](https://docs.layerzero.network/v2/deployments/chains/arc) |
| [LI.FI](https://builder.registrai.cc/ecosystem/li-fi/) | Live on mainnet | [Evidence](https://explorer.arc.io/address/0xa4072583658fae592a3506a42431cb6316a8d40b) |
| [Rango](https://builder.registrai.cc/ecosystem/rango/) | Live on mainnet | [Evidence](https://explorer.arc.io/address/0x69460570c93f9de5e2edbc3052bf10125f0ca22d) |
| [Relay](https://builder.registrai.cc/ecosystem/relay/) | Live on mainnet | [Evidence](https://explorer.arc.io/address/0xb92fe925dc43a0ecde6c8b1a2709c170ec4fff4f) |
| [rhino.fi](https://builder.registrai.cc/ecosystem/rhino-fi/) | Live on mainnet | [Evidence](https://explorer.arc.io/address/0x5e023c31e1d3dcd08a1b3e8c96f6ef8aa8fcacd1) |
| [SoDEX](https://builder.registrai.cc/ecosystem/sodex-bridge/) | Deployed | [Evidence](https://api.llama.fi/protocol/sodex-bridge) |
| [Symbiosis](https://builder.registrai.cc/ecosystem/symbiosis/) | Live on mainnet | [Evidence](https://api.symbiosis.finance/crosschain/v1/chains) |

Announced: [Stargate](https://builder.registrai.cc/ecosystem/stargate/), [Wormhole](https://builder.registrai.cc/ecosystem/wormhole/)

Source: Registrai Arc ecosystem directory; each status links its evidence. Last reviewed 2026-11-01.

[Arc in numbers](https://builder.registrai.cc/arc/) · [Arc ecosystem](https://builder.registrai.cc/ecosystem/)

Source: https://builder.registrai.cc/arc/get-usdc/ · Registrai, builder.registrai.cc, CC BY 4.0

# Arc vs Ethereum vs Solana for stablecoin payments

Arc, Circle's layer-1, uses USDC as its gas token, so a USDC payment pays its fee in USDC; blocks come every 0.51 s (Ethereum 12.0 s, Solana 0.21 s per slot). Ethereum charges fees in ETH and Solana in SOL.

| Measure | Arc | Ethereum | Solana | Source |
| --- | --- | --- | --- | --- |
| Fee currency | USDC [source](https://www.arc.io/blog/how-gas-works-on-arc) | ETH [source](https://ethereum.org/en/developers/docs/gas/) | SOL [source](https://solana.com/docs/core/fees) | Chain documentation |
| Block time | 0.51 s | 12.0 s | 0.21 s | Measured: Arc and Ethereum over the last 10,000 blocks, Solana per slot from recent performance samples (RPC) |
| Finality | Arc's docs say its Proof-of-Authority validator set delivers deterministic finality, where committed blocks cannot be reversed or reorganized, in under one second. [source](https://docs.arc.io/arc/concepts/consensus-layer) | ethereum.org says it takes about 15 minutes for an Ethereum block to finalize, with finality currently reached across two epochs. [source](https://ethereum.org/en/roadmap/single-slot-finality/) | Solana RPC offers processed, confirmed and finalized commitment; finalized is a block the cluster recognizes as finalized with maximum lockout, the strongest confirmation state. [source](https://solana.com/docs/rpc) | Chain documentation |
| Fee for a USDC transfer (estimate) | $0.00098 (i: Gas price 20.00 gwei × 49,000 gas for an ERC-20 transfer through the USDC contract, paid in USDC. A native USDC transfer uses 21,000 gas ($0.00042).) | $0.023 (i: Gas price 0.24 gwei × 45,000 gas for a USDC transfer to an address that already holds USDC × ETH price $2,153. To a new holder: 65,000 gas ($0.034).) | $0.00044 (i: Base fee 5,000 lamports per signature × SOL price $87.57; no priority fee, and no token account creation for a recipient without one.) | RPC gas prices; prices from DefiLlama |
| USDC in circulation | $1,294,381,430 | $42,754,367,251 | $7,043,673,641 | DefiLlama stablecoins by chain, 2026-11-08 |
| Apps measured receiving USDC, 24 h | 31 | Not measured by Registrai | Not measured by Registrai | Arc Ecosystem Index (Registrai) |

Measured 8 Nov 2026, 23:13 UTC. Fees are estimates for one USDC transfer, excluding the amount sent: Arc and Ethereum at the RPC's current gas price (base fee plus suggested tip), Solana at the base fee only. [Arc in numbers](https://builder.registrai.cc/arc/)

[Arc in numbers](https://builder.registrai.cc/arc/) · [Arc ecosystem](https://builder.registrai.cc/ecosystem/)

Source: https://builder.registrai.cc/arc/arc-vs-ethereum-vs-solana/ · Registrai, builder.registrai.cc, CC BY 4.0

# Arc blockchain: facts with sources

Arc is a Layer-1 blockchain built by Circle. It is EVM-compatible, uses USDC as its gas token, and its public mainnet launched on 16 September 2026.

Checked against each source on 2 Nov 2026. Figures that change (USDC supply, activity, apps) are on [Arc in numbers](https://builder.registrai.cc/arc/); projects on Arc in the [directory](https://builder.registrai.cc/ecosystem/).

## What is Arc?

Arc is a Layer-1 blockchain built by Circle. It is EVM-compatible, uses USDC as its gas token, and its public mainnet launched on 16 September 2026. ([source](https://www.circle.com/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet), [source](https://docs.arc.io/arc/references/contract-addresses), [source](https://docs.arc.io/arc/references/evm-differences))

## When did Arc mainnet launch?

Circle launched the public Arc mainnet on 16 September 2026, after a private mainnet phase. ([source](https://www.circle.com/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet)) The public testnet launched on 28 Oct 2025 ([source](https://www.arc.io/pressroom/circle-launches-arc-public-testnet)).

## What is the gas token on Arc?

USDC is Arc's native gas token. The native gas balance uses 18 decimals; the USDC ERC-20 interface at 0x3600…0000 uses 6 decimals. ([source](https://docs.arc.io/arc/references/contract-addresses))

## Is Arc EVM-compatible?

Arc is EVM-compatible and targets Ethereum's Osaka hard fork as its baseline, including EIP-7702. ([source](https://docs.arc.io/arc/references/evm-differences))

## Who runs the validators on Arc?

Along with Circle, Arc's founding validators include BlackRock, DTCC, Galaxy, ICE, Mastercard, MoneyGram, SBI Group, Standard Chartered, Sumitomo Corporation, Visa and Worldpay, in a phased rollout. ([source](https://www.circle.com/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet)) Arc's consensus uses Malachite, a Tendermint BFT implementation, with a permissioned proof-of-authority validator set. ([source](https://docs.arc.io/arc/concepts/consensus-layer)) Circle said the network is exploring a future transition from proof of authority toward proof of stake in 2027. ([source](https://www.circle.com/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet))

## Which stablecoins are on Arc?

16 stablecoins, each listed by its issuer or by Circle:

| Token | Issuer | Contract on Arc | Decimals | Source |
| --- | --- | --- | --- | --- |
| USDC | Circle | [`0x3600000000000000000000000000000000000000`](https://explorer.arc.io/address/0x3600000000000000000000000000000000000000) | 6 | [source](https://docs.arc.io/arc/references/contract-addresses) |
| EURC | Circle | [`0xbef5f6d51cb62b58e6a8f77868681825c6fe21c1`](https://explorer.arc.io/address/0xbef5f6d51cb62b58e6a8f77868681825c6fe21c1) | 6 | [source](https://docs.arc.io/arc/references/contract-addresses) |
| AUDD | Novatti | [`0xdec15d98d8c16d9ca2f8cc94ba4b88fe4f259393`](https://explorer.arc.io/address/0xdec15d98d8c16d9ca2f8cc94ba4b88fe4f259393) | 6 | [source](https://developers.circle.com/stablefx/references/supported-currencies) |
| AUDF | Forte Securities Australia | [`0xd2a530170d71a9cfe1651fb468e2b98f7ed7456b`](https://explorer.arc.io/address/0xd2a530170d71a9cfe1651fb468e2b98f7ed7456b) | 6 | [source](https://developers.circle.com/stablefx/references/supported-currencies) |
| BRLA | Avenia | [`0x75700e137c05b2beb2b3a436ccb551652e3d8b11`](https://explorer.arc.io/address/0x75700e137c05b2beb2b3a436ccb551652e3d8b11) | 18 | [source](https://developers.circle.com/stablefx/references/supported-currencies) |
| CADD | CAD Digital | [`0x24bf8ae7b8e073d766a3509c25b45a6ad30e9046`](https://explorer.arc.io/address/0x24bf8ae7b8e073d766a3509c25b45a6ad30e9046) | 18 | [source](https://developers.circle.com/stablefx/references/supported-currencies) |
| CHFAU | AllUnity | [`0xc6df1b92a6ae61a27059c41e541a91ce8dcb1605`](https://explorer.arc.io/address/0xc6df1b92a6ae61a27059c41e541a91ce8dcb1605) | 6 | [source](https://developers.circle.com/stablefx/references/supported-currencies) |
| EURAU | AllUnity | [`0x4933a85b5b5466fbaf179f72d3de273c287ec2c2`](https://explorer.arc.io/address/0x4933a85b5b5466fbaf179f72d3de273c287ec2c2) | 6 | [source](https://developers.circle.com/stablefx/references/supported-currencies) |
| GBPA | Agant | [`0xbbe6aab0ed76e90aea0d1cd978ec231c8adcdf8b`](https://explorer.arc.io/address/0xbbe6aab0ed76e90aea0d1cd978ec231c8adcdf8b) | 6 | [source](https://developers.circle.com/stablefx/references/supported-currencies) |
| JPYC | JPYC | [`0xe7c3d8c9a439fede00d2600032d5db0be71c3c29`](https://explorer.arc.io/address/0xe7c3d8c9a439fede00d2600032d5db0be71c3c29) | 18 | [source](https://developers.circle.com/stablefx/references/supported-currencies) |
| KRW1 | BDACS | [`0x303dbb88ba14626c7a927e983b73267c575315f7`](https://explorer.arc.io/address/0x303dbb88ba14626c7a927e983b73267c575315f7) | 18 | [source](https://developers.circle.com/stablefx/references/supported-currencies) |
| MXNB | Bitso | [`0xf197ffc28c23e0309b5559e7a166f2c6164c80aa`](https://explorer.arc.io/address/0xf197ffc28c23e0309b5559e7a166f2c6164c80aa) | 6 | [source](https://developers.circle.com/stablefx/references/supported-currencies) |
| QCAD | Canada Stablecorp | [`0xd70c2fa4232e054b373efaea98e4138511c2a309`](https://explorer.arc.io/address/0xd70c2fa4232e054b373efaea98e4138511c2a309) | 6 | [source](https://developers.circle.com/stablefx/references/supported-currencies) |
| SEKAU | AllUnity | [`0xf8524b5ab17d5eca2f78abe8377ceffd323b1dc1`](https://explorer.arc.io/address/0xf8524b5ab17d5eca2f78abe8377ceffd323b1dc1) | 6 | [source](https://developers.circle.com/stablefx/references/supported-currencies) |
| TRYB | Bilira | [`0xfb0705023603dc86325b83d9ff6b0da7921fec17`](https://explorer.arc.io/address/0xfb0705023603dc86325b83d9ff6b0da7921fec17) | 18 | [source](https://developers.circle.com/stablefx/references/supported-currencies) |
| ZARU | Luno | [`0xe205b4e7ac03e3f7b2060c3edf2171aa7126c0d5`](https://explorer.arc.io/address/0xe205b4e7ac03e3f7b2060c3edf2171aa7126c0d5) | 18 | [source](https://developers.circle.com/stablefx/references/supported-currencies) |

Supply on Arc now: [Arc in numbers](https://builder.registrai.cc/arc/).

## What is the Arc mainnet chain ID and RPC URL?

Chain ID 5042 (0x13b2). Public RPC: `https://rpc.mainnet.arc.io` ([source](https://docs.arc.io/arc/references/rpc-endpoints)).

## What block explorer does Arc use?

[explorer.arc.io](https://explorer.arc.io), a Blockscout explorer ([source](https://docs.arc.io/arc/references/rpc-endpoints)).

## Does Arc have its own token?

Circle completed the genesis mint of the ARC token, its full initial supply of 10 billion; it said this is not a commitment to publicly launch ARC, and fees remain payable in USDC. ([source](https://www.circle.com/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet))

[Arc in numbers](https://builder.registrai.cc/arc/) · [Arc ecosystem](https://builder.registrai.cc/ecosystem/) · [Arc vs Ethereum vs Solana](https://builder.registrai.cc/arc/arc-vs-ethereum-vs-solana/)

Source: https://builder.registrai.cc/arc/facts/ · Registrai, builder.registrai.cc, CC BY 4.0

# Arc developer reference

Arc mainnet is chain ID 5042 (0x13b2); its public RPC is https://rpc.mainnet.arc.io, its block explorer is https://explorer.arc.io (Blockscout), and gas is paid in USDC.

Each answer links its source. Projects come from the [Arc ecosystem directory](https://builder.registrai.cc/ecosystem/), last reviewed 2026-11-01. Chain facts: [Arc blockchain: facts with sources](https://builder.registrai.cc/arc/facts/).

- [What is the Arc mainnet chain ID and RPC URL?](#chain-id-rpc)
- [How do I deploy a smart contract on Arc?](#deploy)
- [What block explorer does Arc use?](#explorer)
- [How do I accept USDC payments in my app on Arc?](#accept-usdc)
- [Is there an MCP server for Arc blockchain data?](#mcp)
- [How can an AI agent pay for an API with USDC on Arc using x402?](#x402)

## What is the Arc mainnet chain ID and RPC URL?

Arc mainnet's chain ID is 5042 (0x13b2) and its public RPC URL is https://rpc.mainnet.arc.io, run by Circle with no API key. ([source](https://docs.arc.io/arc/references/connect-to-arc))

| Setting | Value |
| --- | --- |
| Network name | Arc Mainnet |
| Chain ID | 5042 (0x13b2) |
| RPC | `https://rpc.mainnet.arc.io` |
| WebSocket | `wss://rpc.mainnet.arc.io` |
| Currency | USDC, 18 decimals as the native gas token (i: The ERC-20 interface of the same USDC is at 0x3600000000000000000000000000000000000000 with 6 decimals; Arc's docs say not to show the two as separate balances.) |
| Explorer | [https://explorer.arc.io](https://explorer.arc.io) |

### Public RPC endpoints

8 endpoints: 7 answer without a key.

| Provider | HTTP endpoint | Key | Up, 24 h | Up, 7 days | Latency, 24 h median | Blocks behind | Source |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Arc (Circle) | `https://rpc.mainnet.arc.io` | None | 100% | 100% | 34 ms | 0 | [source](https://docs.arc.io/arc/references/rpc-endpoints) |
| [Blockdaemon](https://builder.registrai.cc/ecosystem/blockdaemon/) | `https://rpc.blockdaemon.mainnet.arc.io` | None | 100% | 100% | 14 ms | 0 | [source](https://docs.arc.io/arc/references/rpc-endpoints) |
| [dRPC](https://builder.registrai.cc/ecosystem/drpc/) | `https://rpc.drpc.mainnet.arc.io` | None | 100% | 100% | 28 ms | 0 | [source](https://docs.arc.io/arc/references/rpc-endpoints) |
| [QuickNode](https://builder.registrai.cc/ecosystem/quicknode/) | `https://rpc.quicknode.mainnet.arc.io` | None | 100% | 100% | 34 ms | 0 | [source](https://docs.arc.io/arc/references/rpc-endpoints) |
| [PublicNode (Allnodes)](https://builder.registrai.cc/ecosystem/allnodes/) | `https://arc-rpc.publicnode.com` | None | 100% | 100% | 36 ms | 0 | [source](https://arc.publicnode.com/) |
| [thirdweb](https://builder.registrai.cc/ecosystem/thirdweb/) | `https://5042.rpc.thirdweb.com` | None | Rate-limited (i: Every check from our server in the last 24 h got HTTP 429, the provider's rate limit for use without a key. It answers from other networks; a key lifts the limit.) | – | – | – | [source](https://thirdweb.com/arc) |
| [Tenderly](https://builder.registrai.cc/ecosystem/tenderly/) | `https://arc.gateway.tenderly.co` | None | 100% | 100% | 18 ms | 0 | [source](https://docs.tenderly.co/node-rpc/overview) |
| [Alchemy](https://builder.registrai.cc/ecosystem/alchemy/) | `https://arc-mainnet.g.alchemy.com/v2/YOUR_API_KEY` | API key | Not measured | – | – | – | [source](https://docs.arc.io/arc/references/rpc-endpoints) |

Checked hourly by Registrai; last check 8 Nov 2026, 22:17 UTC, 6 of 7 endpoints up, 1 rate-limited. (i: Every hour, from one server, Registrai calls eth\_chainId once and eth\_blockNumber 3 times, 1 s apart, on each endpoint that needs no key, all endpoints at the same time. A check is up when the chain ID is 5042 and at least 2 of the 3 block-number calls answer within 5 s. Latency is the median time of those calls, so it includes the network path from our server; from elsewhere it differs. An HTTP 429 (the provider's rate limit for use without a key) is shown as rate-limited and left out of uptime. Blocks behind: the highest block any endpoint returned in the last round minus this endpoint's; a block or two is timing, not lag.) Data: [rpc.json](https://builder.registrai.cc/arc/developers/rpc.json). Endpoints listed 2026-11-04; Arc's own list: [RPC endpoints](https://docs.arc.io/arc/references/rpc-endpoints).

## How do I deploy a smart contract on Arc?

Arc is EVM-compatible, so Solidity contracts deploy as on Ethereum, with gas paid in USDC; Arc's docs use Arc Foundry (arc-forge, arc-cast, arc-anvil), a fork of Foundry that supports Arc's differences from Ethereum. ([source](https://docs.arc.io/arc/tutorials/deploy-on-arc), [EVM differences](https://docs.arc.io/arc/references/evm-differences))

1. Install Arc Foundry from its [releases](https://github.com/circlefin/arc-foundry/releases) ([how-to](https://docs.arc.io/arc/tutorials/install-arc-foundry)).
2. Fund the deploying address with USDC on Arc for gas: [how to get USDC onto Arc](https://builder.registrai.cc/arc/get-usdc/).
3. Deploy: `arc-forge create src/Counter.sol:Counter --rpc-url https://rpc.mainnet.arc.io --private-key $PRIVATE_KEY --broadcast`
4. Verify the source on the explorer: `arc-forge verify-contract` with `--verifier blockscout` (Arc's tutorial shows it against the testnet explorer's `/api/`), or submit it on [explorer.arc.io](https://explorer.arc.io).

Arc's tutorial runs these steps on testnet (chain ID 5042002, faucet USDC); on mainnet the RPC and chain ID above apply.

### Developer tools live on Arc

| Project | What it does on Arc | Status | Evidence |
| --- | --- | --- | --- |
| [Allium](https://builder.registrai.cc/ecosystem/allium/) | Onchain data platform; its data catalog and APIs index Arc (raw, decoded, DEX, lending, stablecoin and RWA tables). | Live on mainnet | [evidence](https://docs.allium.so/changelog/overview) |
| [Crossmint](https://builder.registrai.cc/ecosystem/crossmint/) | Stablecoin and wallet infrastructure for enterprises. | Live on mainnet | [evidence](https://docs.crossmint.com/introduction/supported-chains) |
| [DFNS](https://builder.registrai.cc/ecosystem/dfns/) | Wallet-as-a-service and key management platform for banks, fintechs and businesses. | Live on mainnet | [evidence](https://www.arc.io/ecosystem/dfns) |
| [Dune](https://builder.registrai.cc/ecosystem/dune/) | Onchain data query platform; it indexes Arc under the arc schema (blocks, transactions, logs, traces, decoded contracts). | Live on mainnet | [evidence](https://docs.dune.com/data-catalog/evm/arc/overview) |
| [HIFI](https://builder.registrai.cc/ecosystem/hifi/) | API platform for moving money across fiat rails and stablecoins, covering cross-border payments, payouts and stablecoin minting. | Live on mainnet | [evidence](https://www.arc.io/ecosystem/hifi) |
| [Lagoon](https://builder.registrai.cc/ecosystem/lagoon/) | Vault infrastructure for onchain asset management built on the ERC-7540 asynchronous vault standard. | Live on mainnet | [evidence](https://explorer.arc.io/address/0xf185b0083fd2446d3742fe3f4c3175b7e306752b) |
| [Meter](https://builder.registrai.cc/ecosystem/meter/) | Pay-per-call API gateway: a caller pays a registered endpoint in USDC through the MeterRegistry contract and sends the transaction hash as… | Live on mainnet | [evidence](https://explorer.arc.io/address/0x423b8701da3a251a3a3fc2d241b71e8d05744c91) |
| [Pimlico](https://builder.registrai.cc/ecosystem/pimlico/) | Account abstraction infrastructure providing ERC-4337 bundler and paymaster services. | Live on mainnet | [evidence](https://docs.pimlico.io/guides/supported-chains) |
| [Team Finance](https://builder.registrai.cc/ecosystem/team-finance/) | Token tooling platform for creating tokens and for locking liquidity, team tokens and NFTs, with vesting, staking pools, airdrops and… | Live on mainnet | [evidence](https://www.team.finance/arc) |
| [Thirdweb](https://builder.registrai.cc/ecosystem/thirdweb/) | Web3 developer platform for wallets, payments, bridging and tokens. | Live on mainnet | [evidence](https://thirdweb.com/arc) |
| [ZeroDev](https://builder.registrai.cc/ecosystem/zerodev/) | Smart account infrastructure covering account abstraction, gas sponsorship, session keys and embedded wallets. | Live on mainnet | [evidence](https://docs.zerodev.app/sdk/faqs/chains) |

## What block explorer does Arc use?

Arc uses Blockscout as its block explorer, at https://explorer.arc.io for mainnet. ([source](https://docs.arc.io/arc/references/rpc-endpoints))

### Indexers and data

| Project | What it does on Arc | Status | Evidence |
| --- | --- | --- | --- |
| [Blockscout](https://builder.registrai.cc/ecosystem/blockscout/) | Open-source blockchain explorer. | Live on mainnet | [evidence](https://explorer.arc.io) |
| [Goldsky](https://builder.registrai.cc/ecosystem/goldsky/) | Blockchain data and automation platform. | Live on mainnet | [evidence](https://docs.goldsky.com/chains/arc) |
| [Allium](https://builder.registrai.cc/ecosystem/allium/) | Onchain data platform; its data catalog and APIs index Arc (raw, decoded, DEX, lending, stablecoin and RWA tables). | Live on mainnet | [evidence](https://docs.allium.so/changelog/overview) |
| [Dune](https://builder.registrai.cc/ecosystem/dune/) | Onchain data query platform; it indexes Arc under the arc schema (blocks, transactions, logs, traces, decoded contracts). | Live on mainnet | [evidence](https://docs.dune.com/data-catalog/evm/arc/overview) |
| [Alchemy](https://builder.registrai.cc/ecosystem/alchemy/) | Node, data and wallet API provider. | Live on mainnet | [evidence](https://www.alchemy.com/arc) |
| [DefiLlama](https://builder.registrai.cc/ecosystem/defillama/) | DeFi data aggregator that tracks Arc as a chain (chain ID 5042) with TVL and protocol listings. | Live on mainnet | [evidence](https://api.llama.fi/v2/chains) |

Arc's docs also list Envio, Pinax, The Graph, thirdweb and Zerion as data indexers ([source](https://docs.arc.io/arc/tools/data-indexers)). Registrai's own [data API](https://builder.registrai.cc/data-api/) serves app payments, the Arc indices and the directory.

## How do I accept USDC payments in my app on Arc?

Two ways: receive USDC directly to your own address and confirm each payment from USDC's transfer events, or take payments through a provider live on Arc.

- Directly: USDC is Arc's native token (18 decimals) and also an ERC-20 at `0x3600000000000000000000000000000000000000` (6 decimals); Arc's docs describe which events to watch ([USDC system events](https://docs.arc.io/arc/references/usdc-system-events)) and a checkout flow ([eCommerce checkout](https://docs.arc.io/build/ecommerce)).
- Per request, for APIs and AI agents: x402 ([below](#x402)).

### Payment providers for developers

| Project | What it does on Arc | Status | Evidence |
| --- | --- | --- | --- |
| [HIFI](https://builder.registrai.cc/ecosystem/hifi/) | API platform for moving money across fiat rails and stablecoins, covering cross-border payments, payouts and stablecoin minting. | Live on mainnet | [evidence](https://www.arc.io/ecosystem/hifi) |
| [Meter](https://builder.registrai.cc/ecosystem/meter/) | Pay-per-call API gateway: a caller pays a registered endpoint in USDC through the MeterRegistry contract and sends the transaction hash as… | Live on mainnet | [evidence](https://explorer.arc.io/address/0x423b8701da3a251a3a3fc2d241b71e8d05744c91) |

Payment apps already taking USDC on Arc: [apps that accept USDC on Arc](https://builder.registrai.cc/arc/apps-that-accept-usdc/).

## Is there an MCP server for Arc blockchain data?

Yes. Registrai runs a read-only MCP server for Arc blockchain data at https://builder.registrai.cc/api/mcp (Streamable HTTP, no sign-in or key), listed in the MCP registry as cc.registrai/arc-data. It serves the same data as the API: stablecoin payments per app, the Arc indices, the ecosystem directory and Arc chain figures. [Tools and setup](https://builder.registrai.cc/data-api/)

`claude mcp add --transport http registrai-arc https://builder.registrai.cc/api/mcp`

Arc's documentation has its own MCP server at `https://docs.arc.io/mcp`; it searches the docs and does not serve chain data ([source](https://docs.arc.io/ai/mcp)).

## How can an AI agent pay for an API with USDC on Arc using x402?

The API answers HTTP 402 with its price; the agent signs a USDC payment authorization (EIP-3009) and retries the request with it attached. On Arc, Circle Gateway Nanopayments settles these in batches, gas-free for the agent, after a one-time USDC deposit. ([x402](https://developers.circle.com/gateway/nanopayments/concepts/x402), [Nanopayments](https://developers.circle.com/gateway/nanopayments); Arc is supported: [Gateway blockchains](https://developers.circle.com/gateway/references/supported-blockchains))

Circle's sample agent that pays API endpoints in USDC on Arc: [circlefin/arc-nanopayments](https://github.com/circlefin/arc-nanopayments).

### x402 services on Arc

| Project | What it does on Arc | Status | Evidence |
| --- | --- | --- | --- |
| [ArcLens](https://builder.registrai.cc/ecosystem/arclens/) | Arc ecosystem directory and data platform with project listings, campaigns, an explorer and a pay-per-call AI agent API over x402. | Live on mainnet | [evidence](https://github.com/arclens-app/arclens) |
| [Arclight](https://builder.registrai.cc/ecosystem/arclight/) | Also runs an x402 payment facilitator. | Live on mainnet | [evidence](https://arclight.finance/docs/how-it-works) |
| [BlockRun](https://builder.registrai.cc/ecosystem/blockrun/) | Pay-per-call gateway to AI models and data APIs, paid in USDC on Arc through the x402 protocol. | Live on mainnet | [evidence](https://arc.blockrun.ai/) |

Announced: [Orthogonal](https://builder.registrai.cc/ecosystem/orthogonal/)

[Arc in numbers](https://builder.registrai.cc/arc/) · [Developer tools for Arc](https://builder.registrai.cc/ecosystem/developer-tools/) · [Infrastructure for Arc](https://builder.registrai.cc/ecosystem/infrastructure/)

Source: https://builder.registrai.cc/arc/developers/ · Registrai, builder.registrai.cc, CC BY 4.0

# AI answers about Arc

Edition 2026-11-02 · 45 questions · 3 runs · 3 models · [JSON](https://builder.registrai.cc/arc/ai-answers/2026-11-02.json)

Which pages AI models cite when they answer questions about Arc, Circle's blockchain. 45 questions, each asked 3 times of Anthropic claude-sonnet-5-5, Google gemini-2.5-flash and OpenAI gpt-5, through their APIs with web search on. A new edition every week.

## By model

Shares of 369 answers to the questions that are not about Registrai; the registrai.cc column counts all answers.

| Model | Answers | Cite a source | Cite arc.io or circle.com | Cite registrai.cc |
| --- | --- | --- | --- | --- |
| gemini-2.5-flash | 123 | 99.2% | 58.5% | 4.4% |
| claude-sonnet-5-5 | 123 | 100% | 47.2% | 14.8% |
| gpt-5 | 123 | 78% | 43.1% | 19.3% |

## Sites cited most

| # | Site | Answers | Share |
| --- | --- | --- | --- |
| 1 | arc.io (official) | 106 | 28.7% |
| 2 | circle.com (official) | 88 | 23.8% |
| 3 | bitcoinfoundation.org | 57 | 15.4% |
| 4 | trustswap.com | 42 | 11.4% |
| 5 | github.com | 39 | 10.6% |
| 6 | kucoin.com | 31 | 8.4% |
| 7 | bitquery.io | 26 | 7% |
| 8 | irsolutions.tech | 26 | 7% |
| 9 | docs.arc.io (official) | 23 | 6.2% |
| 10 | eco.com | 23 | 6.2% |
| 11 | builder.registrai.cc | 22 | 6% |
| 12 | airdropalert.com | 20 | 5.4% |
| 13 | coinbureau.com | 20 | 5.4% |
| 14 | cryptorank.io | 18 | 4.9% |
| 15 | defillama.com | 18 | 4.9% |
| 16 | docs.bitquery.io | 18 | 4.9% |
| 17 | cryptobriefing.com | 16 | 4.3% |
| 18 | cryptopotato.com | 15 | 4.1% |
| 19 | youtube.com | 14 | 3.8% |
| 20 | binance.com | 13 | 3.5% |

Official: arc.io, circle.com and their subdomains.

## By topic

| Topic | Answers | Sites cited most |
| --- | --- | --- |
| The chain | 63 | arc.io 46% · circle.com 46% · bitcoinfoundation.org 28.6% |
| Apps and ecosystem | 108 | arc.io 38% · circle.com 30.6% · bitcoinfoundation.org 22.2% |
| Data and figures | 72 | bitquery.io 29.2% · arc.io 19.4% · defillama.com 15.3% |
| Named projects | 72 | github.com 15.3% · arcland.app 11.1% · bitcoinfoundation.org 11.1% |
| Developers | 54 | arc.io 33.3% · github.com 29.6% · circle.com 27.8% |

## Pages cited most

1. [circle.com/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet](https://circle.com/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet) (30)
2. [bitquery.io/investigations/arc-blockchain-first-month](https://bitquery.io/investigations/arc-blockchain-first-month) (15)
3. [circle.com/pressroom/circle-launches-arc-public-testnet](https://circle.com/pressroom/circle-launches-arc-public-testnet) (13)
4. [coinbureau.com/education/what-is-arc-circle-stablechain](https://coinbureau.com/education/what-is-arc-circle-stablechain) (13)
5. [docs.bitquery.io/docs/blockchain/arc-mainnet](https://docs.bitquery.io/docs/blockchain/arc-mainnet) (13)
6. [arc.io/network](https://arc.io/network) (12)
7. [datawallet.com/crypto/arc-chain-explained](https://datawallet.com/crypto/arc-chain-explained) (11)
8. [builder.registrai.cc/apps](https://builder.registrai.cc/apps) (9)
9. [builder.registrai.cc/arc/most-used-apps](https://builder.registrai.cc/arc/most-used-apps) (9)
10. [help.1inch.com/en/articles/16982737-how-to-use-1inch-on-arc](https://help.1inch.com/en/articles/16982737-how-to-use-1inch-on-arc) (9)

gemini-2.5-flash's API names only the site behind a source, not the page, so its answers count for sites but not here.

## Over time

Per edition and model: share of answers citing registrai.cc (all questions) · share citing arc.io or circle.com (questions not about Registrai).

| Edition | claude-sonnet-5-5 | gemini-2.5-flash | gpt-5 |
| --- | --- | --- | --- |
| [2026-11-02](https://builder.registrai.cc/arc/ai-answers/2026-11-02.json) | 14.8% · 47.2% | 4.4% · 58.5% | 19.3% · 43.1% |
| [2026-10-19](https://builder.registrai.cc/arc/ai-answers/2026-10-19.json) | 0% · 43.9% | 0.7% · 60.2% | 8.1% · 45.5% |

## Read by hand

Not counted by the script: from reading the answers of this edition.

- Outside the four questions about Registrai, gpt-5 asked which Arc was meant without answering in 28 of 123 answers (51 in the 2026-10-19 edition). In 11 more it asked and then answered for Circle's Arc.
- When claude-sonnet-5-5 cited registrai.cc, it quoted older copies of the pages: figures with data to 29 Oct and a directory of 261 projects, from before the 31 Oct review (297 on the day of the run). gpt-5 quoted the figures of the day of the run (2 Nov). Answers to the daily stablecoin volume question differ for that reason ($38.3 million and $17.8 million, both from the same page at different times).
- claude-sonnet-5-5 still found no current figure for daily transactions, and for active wallets it quoted a Bitquery analysis of Arc's first month.

## Method

Each question goes to each model's API with web search on, more than once, because answers vary between runs. Only the pages an answer cites are kept, never its text; each count is the number of answers that cite a site or page at least once. Questions about named projects are counted only in their topic, never per project. Registrai runs this test and is one of the sites measured.

## Questions

1. What is Arc, the blockchain by Circle? (The chain)
2. When did Arc mainnet launch? (The chain)
3. What is the gas token on Arc? (The chain)
4. How is Arc different from Ethereum and Solana for payments? (The chain)
5. Who runs the validators on the Arc blockchain? (The chain)
6. Is Arc blockchain EVM compatible? (The chain)
7. Which stablecoins are available on Arc? (The chain)
8. What apps are on Arc? (Apps and ecosystem)
9. What are the most used apps on the Arc blockchain? (Apps and ecosystem)
10. Which DEXs are on Arc? (Apps and ecosystem)
11. Where can I lend or borrow on Arc? (Apps and ecosystem)
12. Are there games on the Arc blockchain? (Apps and ecosystem)
13. Which wallets support Arc? (Apps and ecosystem)
14. How do I bridge USDC to Arc? (Apps and ecosystem)
15. Which payment apps use Arc? (Apps and ecosystem)
16. What new projects launched on Arc this month? (Apps and ecosystem)
17. Which companies are building on Arc? (Apps and ecosystem)
18. Is there an Arc ecosystem directory or list of dapps? (Apps and ecosystem)
19. Which apps accept USDC on Arc? (Apps and ecosystem)
20. What is the TVL on Arc? (Data and figures)
21. How much USDC is on Arc? (Data and figures)
22. How many daily transactions does Arc have? (Data and figures)
23. How many active wallets are on Arc? (Data and figures)
24. Which Arc app has the most stablecoin payments? (Data and figures)
25. How much stablecoin volume do apps on Arc process per day? (Data and figures)
26. Is there an index that tracks activity on the Arc blockchain? (Data and figures)
27. Where can I get an API for Arc blockchain app data? (Data and figures)
28. What is Archery on Arc? (Named projects)
29. Is Uniswap deployed on Arc? (Named projects)
30. What is Argus on the Arc blockchain? (Named projects)
31. What is Peach on Arc? (Named projects)
32. What is Arclight Finance? (Named projects)
33. Who controls the contracts of Tolly on Arc? (Named projects)
34. What is ArcLand on Arc? (Named projects)
35. Is Curve on Arc? (Named projects)
36. How do I deploy a smart contract on Arc? (Developers)
37. What is the Arc mainnet chain ID and RPC URL? (Developers)
38. What block explorer does Arc use? (Developers)
39. How do I accept USDC payments in my app on Arc? (Developers)
40. Is there an MCP server for Arc blockchain data? (Developers)
41. How can an AI agent pay for an API with USDC on Arc using x402? (Developers)
42. What is Registrai? (Registrai)
43. What is the Arc Builders Index by Registrai? (Registrai)
44. Is Registrai's Arc data reliable? (Registrai)
45. What does the Registrai Data API offer? (Registrai)

## Earlier editions

- [2026-10-19 (JSON)](https://builder.registrai.cc/arc/ai-answers/2026-10-19.json)

Source: https://builder.registrai.cc/arc/ai-answers/ · Registrai, builder.registrai.cc, CC BY 4.0

# Arc Studio

Snapshot 2026-11-02 · 33 apps on GitHub · [JSON](https://builder.registrai.cc/arc/studio/data.json)

Apps built with [Arc Studio](https://studio.arc.io), Circle's AI coding agent for Arc, that are public on GitHub: their sites, contracts on Arc and USDC paid through them; the Studio CLI and what changed. (i: Arc Studio builds an app from a prompt and deploys its contracts to Arc testnet only, so a contract on mainnet was deployed outside it. Updated weekly.)

## In numbers

| Apps built with Arc Studio on GitHub | 33 |
| --- | --- |
| With a site | 19 |
| On their own domain | 3 |
| With contracts on Arc testnet | 20 |
| With a testnet contract deployed through Circle's contract deployer | 18 |
| With contracts on Arc mainnet | 8 |
| With USDC paid through their mainnet contracts, last 30 days | 3 |
| In the Arc ecosystem directory | 6 |
| Other repos that use or mention Arc Studio | 27 |

## Arc Studio CLI

[@circle-fin/arc-studio-cli](https://www.npmjs.com/package/@circle-fin/arc-studio-cli) on npm: 56 downloads on the last day, 668 in the last week, 1,238 in the last month. 10 releases since 2026-08-29; latest 1.2.2 on 2026-10-23.

## Apps built with Arc Studio

Sorted by repo name. Mainnet payments: USDC paid through the app's mainnet contracts in the last 30 days. (i: A payment is a transaction through one of the app's mainnet contracts in which the sender moved USDC, native or ERC-20, counted once from Arc's USDC system events; the app's own payouts and transfers to oneself are not payments. USDC an app moves through shared contracts (for example Arc's Multicall3From) cannot be told apart from anyone else's and is not counted.)

| Repo | Site | Created | Last commit | Testnet contracts | Mainnet contracts | Mainnet payments | Directory |
| --- | --- | --- | --- | --- | --- | --- | --- |
| [0xNana/afterlife](https://github.com/0xNana/afterlife) | [afterlife-gamma.vercel.app](https://afterlife-gamma.vercel.app) | 2026-10-19 | 2026-10-22 | [0x4d64…ef7b](https://explorer.testnet.arc.io/address/0x4d64cb8bd361061b92fe983c7326e172eb6fef7b) [0xcbe6…c441](https://explorer.testnet.arc.io/address/0xcbe6df9722be9c40d18ed3d6263e42c74312c441) | [0xcbe6…c441](https://explorer.arc.io/address/0xcbe6df9722be9c40d18ed3d6263e42c74312c441) | 1 from 1 wallet, 0.10 USDC | |
| [Agozie180/PredictAgent](https://github.com/Agozie180/PredictAgent) | [predict-agent.vercel.app](https://predict-agent.vercel.app) | 2026-10-16 | 2026-10-23 | [0x5cba…97b8](https://explorer.testnet.arc.io/address/0x5cba315ecbc5abc11f5351036a0cb80b13d097b8) | [0xf4dc…c65f](https://explorer.arc.io/address/0xf4dcf358ecea1b66fe3d61bbb1c17b23f109c65f) [0xd64d…75ff](https://explorer.arc.io/address/0xd64d1fd08e81bbf5aaa194a138d005aa4d4e75ff) | 5 from 1 wallet, 0.50 USDC | [predictagent](https://builder.registrai.cc/ecosystem/predictagent/) |
| [andromedacripto/nuviapay](https://github.com/andromedacripto/nuviapay) | | 2026-09-18 | 2026-09-27 | | | | |
| [AnointingPaschal/glowfun](https://github.com/AnointingPaschal/glowfun) | | 2026-09-17 | 2026-09-28 | | | | |
| [damiTheCoder/Stryk3.0](https://github.com/damiTheCoder/Stryk3.0) | [stryk3-0.vercel.app](https://stryk3-0.vercel.app) | 2026-09-22 | 2026-09-29 | [0x0948…1abd](https://explorer.testnet.arc.io/address/0x0948ee3ce053d3c5d9b0d32f8b349785f6bb1abd) [0xbeff…e419](https://explorer.testnet.arc.io/address/0xbeff9105ae281ae07943cd263466b34c2737e419) [0x7814…01f1](https://explorer.testnet.arc.io/address/0x7814f445fd67d10b0ab0b6a67141092d4f6c01f1) +15 | | | |
| [DanhCaTuanNgoc/ArcFlow](https://github.com/DanhCaTuanNgoc/ArcFlow) | | 2026-10-19 | 2026-10-19 | | | | |
| [dannydjfox07-cmyk/arc-escrow](https://github.com/dannydjfox07-cmyk/arc-escrow) | [arc-escrow-henna.vercel.app](https://arc-escrow-henna.vercel.app) | 2026-10-21 | 2026-10-30 | [0x77ed…0513](https://explorer.testnet.arc.io/address/0x77ed48faeba9566d2d9f0d6552949a534e010513) | | | |
| [devvd25/arc-blockchain](https://github.com/devvd25/arc-blockchain) | | 2026-10-14 | 2026-10-14 | | | | |
| [Dragoon4002/crewpay](https://github.com/Dragoon4002/crewpay) | | 2026-10-20 | 2026-10-20 | [0x6cd7…1049](https://explorer.testnet.arc.io/address/0x6cd751bbc2d157ce0d8126636aa31cd937371049) [0xd63e…11c0](https://explorer.testnet.arc.io/address/0xd63ecc878dba10540ce6427eaef18aa29b0e11c0) | [0x39b8…5a6c](https://explorer.arc.io/address/0x39b8dc168654f3e58b9b8c06a667b9d351995a6c) | | |
| [Elijah463/beacon-oracle](https://github.com/Elijah463/beacon-oracle) | [beacon-oracle.vercel.app](https://beacon-oracle.vercel.app) | 2026-10-21 | 2026-11-01 | [0xe0e4…e0ea](https://explorer.testnet.arc.io/address/0xe0e4894106b1e517752515d40601ec890262e0ea) [0x8a9b…4797](https://explorer.testnet.arc.io/address/0x8a9bc80e846125aba50b8936fd47cdb7cbc44797) [0x71d2…7779](https://explorer.testnet.arc.io/address/0x71d2fe7ca6bb8ead42a5bde78d64a1bb07ea7779) +6 | [0xe0e4…e0ea](https://explorer.arc.io/address/0xe0e4894106b1e517752515d40601ec890262e0ea) | | [beacon-oracle](https://builder.registrai.cc/ecosystem/beacon-oracle/) |
| [gaineziswear/vitalos](https://github.com/gaineziswear/vitalos) | | 2026-09-29 | 2026-10-02 | | | | |
| [hexquarter/gig-arc](https://github.com/hexquarter/gig-arc) | | 2026-09-22 | 2026-09-22 | [0x1a49…bb1a](https://explorer.testnet.arc.io/address/0x1a4940b49907e6cf0691525cbcd794314d1fbb1a) [0xc33e…0f0d](https://explorer.testnet.arc.io/address/0xc33e44b693ae368fa954107b7345c427fe480f0d) [0x679f…6d06](https://explorer.testnet.arc.io/address/0x679ff21d00a0ac900aaa66647647a04328ee6d06) +1 | | | |
| [I-am-Esmart/HumanLayer](https://github.com/I-am-Esmart/HumanLayer) | [agent-human-layer.vercel.app](https://agent-human-layer.vercel.app) | 2026-10-07 | 2026-10-31 | [0x5b12…ef42](https://explorer.testnet.arc.io/address/0x5b12ce46c7194ad57d143bc22847224047b1ef42) [0x07b3…e5e2](https://explorer.testnet.arc.io/address/0x07b37d3101b41c0d2eeb983dd8fdc302cc7ce5e2) [0x4ec5…072d](https://explorer.testnet.arc.io/address/0x4ec5cd39ccdf09e9b6f3f5a46f8777ad6ab5072d) +1 | [0x3f77…67fe](https://explorer.arc.io/address/0x3f77cbaec7798024c1ea91755dffeb0c516767fe) [0x4376…3e1e](https://explorer.arc.io/address/0x43762d26a9c035d70c04d3cef58db46227073e1e) | 3 from 1 wallet, 0.40 USDC | [humanlayer](https://builder.registrai.cc/ecosystem/humanlayer/) |
| [IDESSIEN/vesto](https://github.com/IDESSIEN/vesto) | [vesto-ruddy.vercel.app](https://vesto-ruddy.vercel.app) | 2026-09-17 | 2026-09-29 | | | | |
| [jogmg/arcflow](https://github.com/jogmg/arcflow) | | 2026-09-24 | 2026-09-28 | [0x5327…570e](https://explorer.testnet.arc.io/address/0x53279d8b45c5eaa1f45156236b2cb35c775b570e) [0x4e7b…895b](https://explorer.testnet.arc.io/address/0x4e7b39810de658bb1a6cfa9a19530fe4c9d6895b) | | | |
| [Khanh-2005/ARC](https://github.com/Khanh-2005/ARC) | | 2026-10-14 | 2026-10-14 | | | | |
| [levantuy/arcsave](https://github.com/levantuy/arcsave) | [arcsave-seven.vercel.app](https://arcsave-seven.vercel.app) | 2026-09-21 | 2026-09-21 | [0x8549…b8fb](https://explorer.testnet.arc.io/address/0x8549cf8506dea24b8f7ef29807e676f7065ab8fb) | | | |
| [levantuy/flowescrow](https://github.com/levantuy/flowescrow) | [flowescrow-amber.vercel.app](https://flowescrow-amber.vercel.app) | 2026-09-21 | 2026-09-21 | [0x74ff…e855](https://explorer.testnet.arc.io/address/0x74ffa03f3828c987c1202d1477aac6f1b225e855) | | | |
| [linux070/Trivio](https://github.com/linux070/Trivio) | [trivioplay.vercel.app](https://trivioplay.vercel.app) | 2026-09-21 | 2026-10-12 | [0x1b78…4624](https://explorer.testnet.arc.io/address/0x1b785e38e8ebb334b52a305a10e92b5ef9564624) [0x11b3…b171](https://explorer.testnet.arc.io/address/0x11b30d080135bdb746adf2bdfb9754605fb9b171) [0x68c0…0ed3](https://explorer.testnet.arc.io/address/0x68c0f6749a656f6effb7f702026c113cce7b0ed3) +1 | | | |
| [mahamadoubmaiga2025-hub/mahamadoubmaiga2025-hub.github.io](https://github.com/mahamadoubmaiga2025-hub/mahamadoubmaiga2025-hub.github.io) | | 2026-09-08 | 2026-09-18 | | | | |
| [MrTimonM/reversa](https://github.com/MrTimonM/reversa) | | 2026-10-28 | 2026-10-28 | | | | |
| [nheoshikuyanhemo/Pante](https://github.com/nheoshikuyanhemo/Pante) | [pante.vercel.app](https://pante.vercel.app) | 2026-07-17 | 2026-09-25 | [0xda44…d1cc](https://explorer.testnet.arc.io/address/0xda447c6800004fd7f46921f7a6a0fceb8e96d1cc) | [0xafad…5645](https://explorer.arc.io/address/0xafad8536f3511b3f7bee6f3ba4b74dee699d5645) | | [pante](https://builder.registrai.cc/ecosystem/pante/) |
| [nheoshikuyanhemo/Zero\_Organization](https://github.com/nheoshikuyanhemo/Zero_Organization) | | 2026-10-02 | 2026-10-02 | | | | |
| [Nomad07/arc-erc8004-explorer](https://github.com/Nomad07/arc-erc8004-explorer) | [arcagents.app](https://arcagents.app) | 2026-09-21 | 2026-10-21 | | | | |
| [okelo0121/scratchy](https://github.com/okelo0121/scratchy) | [scratchy.okelo.tech](https://scratchy.okelo.tech) | 2026-09-21 | 2026-10-23 | [0x0b61…6dfc](https://explorer.testnet.arc.io/address/0x0b612a742aab5ed55b84c181af4258204e0d6dfc) [0x5cc6…f6ba](https://explorer.testnet.arc.io/address/0x5cc65165570799bdde45f0307fd8be8186e2f6ba) [0xdb0e…f75a](https://explorer.testnet.arc.io/address/0xdb0e1558161f89599530c0874359fea9b9c1f75a) +1 | | | |
| [s21v1d9p/pledgeback](https://github.com/s21v1d9p/pledgeback) | | 2026-10-25 | 2026-10-25 | [0x82f7…bec9](https://explorer.testnet.arc.io/address/0x82f72eee77cfa6f95ed9ccb70087d386d8c1bec9) [0xc871…b50c](https://explorer.testnet.arc.io/address/0xc87107ba4394db173041a2fb69869439aeb5b50c) | | | |
| [Solaeth/TOPup-PAY](https://github.com/Solaeth/TOPup-PAY) | | 2026-10-11 | 2026-10-11 | | | | |
| [SPLITTY-ORG/SPLITTY](https://github.com/SPLITTY-ORG/SPLITTY) | [splitty.live](https://splitty.live) | 2026-08-04 | 2026-10-23 | [0x941e…0032](https://explorer.testnet.arc.io/address/0x941e49c0cf2f76cc4f79d9fd1e4a892893e90032) [0x5b09…14c3](https://explorer.testnet.arc.io/address/0x5b09db6bc8085032ac2e63ada99de0d4c8f414c3) | [0x941e…0032](https://explorer.arc.io/address/0x941e49c0cf2f76cc4f79d9fd1e4a892893e90032) | | [splitty](https://builder.registrai.cc/ecosystem/splitty/) |
| [Tgood91/erc20z-f0rge](https://github.com/Tgood91/erc20z-f0rge) | [erc20z-f0rge.vercel.app](https://erc20z-f0rge.vercel.app) | 2026-09-17 | 2026-09-17 | [0xda41…d0ea](https://explorer.testnet.arc.io/address/0xda41d7e12c93e92b6005f9527cd7eaa357ded0ea) [0xa3cb…2006](https://explorer.testnet.arc.io/address/0xa3cb024f2ba5ecfd5178c3079f4c240b152a2006) | | | |
| [thesithunyein/meter](https://github.com/thesithunyein/meter) | [getmeter.vercel.app](https://getmeter.vercel.app) | 2026-10-24 | 2026-10-30 | [0x63d5…d2f9](https://explorer.testnet.arc.io/address/0x63d52ea2f47b2db6edba7bb6f33c5abc1e81d2f9) | [0x423b…4c91](https://explorer.arc.io/address/0x423b8701da3a251a3a3fc2d241b71e8d05744c91) | | [meter](https://builder.registrai.cc/ecosystem/meter/) |
| [tosinchukwu/medcare](https://github.com/tosinchukwu/medcare) | [medcarebook.vercel.app](https://medcarebook.vercel.app) | 2026-10-30 | 2026-11-02 | [0x3c8d…b228](https://explorer.testnet.arc.io/address/0x3c8d616be7d48c8400ca7103cf3ae1149581b228) | | | |
| [unifyWeb3/riskdefii](https://github.com/unifyWeb3/riskdefii) | [riskdefii.vercel.app](https://riskdefii.vercel.app) | 2026-10-07 | 2026-10-07 | | | | |
| [xavage-szn/15market](https://github.com/xavage-szn/15market) | [15market.vercel.app](https://15market.vercel.app) | 2026-01-28 | 2026-11-02 | [0xdd90…6f30](https://explorer.testnet.arc.io/address/0xdd90060508d7844991511bcc8f4a8500ab326f30) [0x0285…dd00](https://explorer.testnet.arc.io/address/0x02858fddb58899bdedc10e54253e4e63d9a1dd00) [0x4ad9…c1c8](https://explorer.testnet.arc.io/address/0x4ad92eafb8867f4d5c95dcb7edc922e30b3bc1c8) +3 | | | |

## Other repos that use or mention Arc Studio

Agents, skills, docs and apps that name Arc Studio or its CLI but were not exported from it.

- [0xshubhs/ethglobal-ideas](https://github.com/0xshubhs/ethglobal-ideas)
- [aeonfun/aeon](https://github.com/aeonfun/aeon) · [www.aeon.fun](https://www.aeon.fun)
- [aeonfun/aeon-agent](https://github.com/aeonfun/aeon-agent)
- [aquattdabackup/HuiPot](https://github.com/aquattdabackup/HuiPot) · [hui-pot.vercel.app](https://hui-pot.vercel.app)
- [bashir1738/lynto](https://github.com/bashir1738/lynto)
- [Blockchain-Oracle/Kawase](https://github.com/Blockchain-Oracle/Kawase) · [getkawase.xyz](https://getkawase.xyz)
- [Ditto190/Aeon-automaton-codeyourself-mm](https://github.com/Ditto190/Aeon-automaton-codeyourself-mm)
- [dnimdeeps/APROX](https://github.com/dnimdeeps/APROX) · [aprox-2.vercel.app](https://aprox-2.vercel.app)
- [emmanuelist/valuta](https://github.com/emmanuelist/valuta) · [valuta-arc.vercel.app](https://valuta-arc.vercel.app)
- [Eunryong/MoaArc](https://github.com/Eunryong/MoaArc)
- [godfather-idn/flasharcpaynusantara-arcstudio](https://github.com/godfather-idn/flasharcpaynusantara-arcstudio)
- [hedauav/clippo](https://github.com/hedauav/clippo)
- [jogmg/glimmerlock](https://github.com/jogmg/glimmerlock)
- [LiamVisionary/aeon-template](https://github.com/LiamVisionary/aeon-template)
- [Mansi2007275/stub](https://github.com/Mansi2007275/stub) · [stub.0xpay.fun](https://stub.0xpay.fun)
- [MiroShark/miroshark-aeon](https://github.com/MiroShark/miroshark-aeon)
- [MrSufferer/mend](https://github.com/MrSufferer/mend)
- [pajarori/assetlas](https://github.com/pajarori/assetlas)
- [pedro-pelicioni/stable-build](https://github.com/pedro-pelicioni/stable-build) · [stable-build.vercel.app](https://stable-build.vercel.app)
- [RizRiyz/luvus](https://github.com/RizRiyz/luvus) · [luvus.dev](https://luvus.dev)
- [shsobuz00/PremiumCreat](https://github.com/shsobuz00/PremiumCreat) · [premium-creat.vercel.app](https://premium-creat.vercel.app)
- [Svector-anu/bon-travail](https://github.com/Svector-anu/bon-travail)
- [timix648/gavel](https://github.com/timix648/gavel) · [gavel-alpha.vercel.app](https://gavel-alpha.vercel.app)
- [Tolu-David/arcpilot](https://github.com/Tolu-David/arcpilot)
- [unifyWeb3/shiftproof](https://github.com/unifyWeb3/shiftproof) · [shiftproof-phi.vercel.app](https://shiftproof-phi.vercel.app)
- [YongseopKim/public\_share](https://github.com/YongseopKim/public_share)
- [ZhenYan1214/ARC\_2](https://github.com/ZhenYan1214/ARC_2)

## Changelog

- 2026-10-23: [CLI 1.2.2 released](https://www.npmjs.com/package/@circle-fin/arc-studio-cli/v/1.2.2)
- 2026-10-06: [CLI 1.2.0 released](https://www.npmjs.com/package/@circle-fin/arc-studio-cli/v/1.2.0)
- 2026-10-06: [CLI 1.2.1 released](https://www.npmjs.com/package/@circle-fin/arc-studio-cli/v/1.2.1)
- 2026-09-17: [arc.io blog: Build a USDC revenue splitting app with Arc Studio no code required](https://www.arc.io/blog/build-a-usdc-revenue-splitting-app-with-arc-studio-no-code-required)
- 2026-09-17: [arc.io blog: Introducing Arc Studio the onchain coding agent](https://www.arc.io/blog/introducing-arc-studio-the-onchain-coding-agent)
- 2026-09-14: [CLI 1.1.2 released](https://www.npmjs.com/package/@circle-fin/arc-studio-cli/v/1.1.2)
- 2026-09-14: [CLI 1.1.3 released](https://www.npmjs.com/package/@circle-fin/arc-studio-cli/v/1.1.3)
- 2026-09-10: [CLI 1.1.0 released](https://www.npmjs.com/package/@circle-fin/arc-studio-cli/v/1.1.0)
- 2026-09-01: [CLI 1.0.9 released](https://www.npmjs.com/package/@circle-fin/arc-studio-cli/v/1.0.9)
- 2026-08-31: [CLI 1.0.7 released](https://www.npmjs.com/package/@circle-fin/arc-studio-cli/v/1.0.7)
- 2026-08-31: [CLI 1.0.8 released](https://www.npmjs.com/package/@circle-fin/arc-studio-cli/v/1.0.8)
- 2026-08-29: [CLI 1.0.5 released](https://www.npmjs.com/package/@circle-fin/arc-studio-cli/v/1.0.5)

## Over time

| Snapshot | Apps | Site | Own domain | Testnet | Mainnet | USDC payments | In directory | CLI / week |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 2026-11-02 | 33 | 19 | 3 | 20 | 8 | 3 | 6 | 668 |
| 2026-11-01 | 32 | 18 | 3 | 19 | 8 | 3 | 6 | 668 |

## Method

Public GitHub repos with Arc Studio's fingerprint, the contracts their files name, and USDC paid through those contracts on mainnet. (i: Public GitHub repositories whose code contains "preview.studio.arc.io" (Arc Studio writes it into the apps it exports) or "@circle-fin/arc-studio-cli". Contracts are addresses written in each repo's config and deployment files, checked for code on Arc testnet and mainnet. Mainnet payments: USDC the sender moved in transactions through the app's mainnet contracts, last 30 days. Arc Studio writes `preview.studio.arc.io` into the Vite config and session log of every app it exports; a repo is counted as an app built with Arc Studio when the match is in one of those files, and as a repo that mentions Studio otherwise. Forks are left out. Addresses shared by many apps (USDC, EURC, Permit2, Multicall3, EntryPoints, contracts of other projects in the directory, and any address found in three or more of these repos) are not counted as an app's own. Contracts created by factories that put the same contract on every chain (Safe, CREATE2, CreateX, EntryPoint) are left out, and so is a mainnet address that GitHub code search also finds in another owner's repo (a token or protocol the app uses; Registrai's own repos do not count). An app is linked to a directory entry only when that entry names the app's repo or its GitHub owner. Arc Studio deploys through Circle's ContractBytecodeDeployer (`0xa3039A54856ed74B5AEc999EeF3fc954Ab010Cf6` on testnet); other Circle tools use it too. A contract at an address from the repo is a strong sign, not proof, that the app deployed it.)

Not covered: private repos, apps never pushed to GitHub, preview links (they share one wildcard certificate, so they cannot be listed), and Studio's sign-ups and sessions, which only Circle has. Registrai is not run or reviewed by Circle or Arc. Data CC BY 4.0.

Source: https://builder.registrai.cc/arc/studio/ · Registrai, builder.registrai.cc, CC BY 4.0

## Projects

297 projects in the Arc ecosystem directory (https://builder.registrai.cc/ecosystem/).

- **0x** (DEXs, Live on mainnet): DEX aggregator and swap API provider. Its Settler contracts, AllowanceHolder and multicall helper are deployed on Arc (chain 5042), per the 0x-settler repository. https://0x.org — https://builder.registrai.cc/ecosystem/0x/
- **1inch** (DEXs, Live on mainnet): DEX aggregator. Its Business APIs (swap, limit orders, data and RPC) support Arc with chain ID 5042, and a limit order protocol contract is published for Arc in its limit-order SDK. https://1inch.io — https://builder.registrai.cc/ecosystem/1inch/
- **A New One** (Lending, Live on mainnet): Non-custodial front end on Arc for Aave V4 and Morpho lending, CCTP V2 bridging and AnewOne.Fun, a USDC bonding-curve launchpad. Its docs list the platform contract on Arc mainnet (chain ID 5042), live since 2026-09-16. https://www.anewone.xyz — https://builder.registrai.cc/ecosystem/a-new-one/
- **Aave** (Lending, Live on mainnet): Onchain lending and borrowing protocol. Aave v4 is deployed on Arc with a Core Hub and spokes, including Main, Forex, Treasury and USDC Maple eSpokes, per the Aave address book. https://aave.com/ — https://builder.registrai.cc/ecosystem/aave/
- **Absa** (Banks, Announced): Bank holding company offering personal, business and wealth banking across Africa. Named among banks and asset managers engaging with Arc in Circle's 2025-10-28 testnet announcement. https://www.absa.africa — https://builder.registrai.cc/ecosystem/absa/
- **Across** (Bridges and cross-chain, Live on mainnet): Cross-chain bridge. Across has a SpokePool and MulticallHandler on Arc (chain 5042) and quotes USDC routes into and out of Arc, according to its September 2026 blog post. https://across.to — https://builder.registrai.cc/ecosystem/across/
- **Aero** (DEXs, Live on mainnet): Exchange from Dromos Labs with Slipstream concentrated-liquidity and basic pools on Arc. It launched Aero Lite on Arc on 2026-09-16; the full Aero launch on 2026-10-21 named Arc among seven networks. https://aero.xyz — https://builder.registrai.cc/ecosystem/aerodrome/
- **Agant** (Stablecoin issuers, Live on mainnet): UK issuer of GBPA, a pound sterling stablecoin, which is deployed on Arc. The GBPA contract on Arc mainnet had a supply of 575,218 GBPA on 2026-10-31, and Arc's 2026-09-16 mainnet post lists GBPA. https://www.agant.io — https://builder.registrai.cc/ecosystem/agant/
- **Alchemy** (Infrastructure, Live on mainnet): Node, data and wallet API provider. Its Arc page states that Arc mainnet is live on Alchemy, and its docs are available for building on Arc. https://www.alchemy.com — https://builder.registrai.cc/ecosystem/alchemy/
- **Alcove** (Wallets, Announced): Mobile wallet by Aleo Labs for sending private dollars on Aleo, backed 1:1 by USDCx. Listed as an Arc ecosystem partner; its own site does not mention Arc. https://alcovewallet.com/ — https://builder.registrai.cc/ecosystem/alcove/
- **Aleo** (Bridges and cross-chain, Live on mainnet): Privacy layer-1 where USDCx is minted against USDC deposited in Circle xReserve, including the xReserve contract on Arc. Circle's xReserve docs list Arc mainnet as a source chain since 2026-09-16 and Aleo as a mainnet remote chain. https://aleo.org/ — https://builder.registrai.cc/ecosystem/aleo/
- **Alethieum** (AI agents, Announced): AI research lab and agency that publishes research on machine payments, including a payment profile for metered inference. Named among early services using Circle's Agent Stack to bring agents to Arc in Circle's 2026-09-16 announcement. https://alethieum.com — https://builder.registrai.cc/ecosystem/alethieum/
- **Alfred Pay** (Payments, Announced): Stablecoin payment infrastructure for Latin America: virtual local accounts, collections, conversion and payouts through an API. Named among payments firms enabling settlement on Arc in Circle's 2026-09-16 announcement. https://alfredpay.io — https://builder.registrai.cc/ecosystem/alfred-pay/
- **Allium** (Infrastructure, Live on mainnet): Onchain data platform; its data catalog and APIs index Arc (raw, decoded, DEX, lending, stablecoin and RWA tables). Its changelog says Arc balances and transactions are queryable from Arc mainnet launch day. https://www.allium.so/ — https://builder.registrai.cc/ecosystem/allium/
- **Allnodes** (Infrastructure, Live on mainnet): Node hosting and staking provider; its PublicNode service runs a free public Arc RPC endpoint (arc-rpc.publicnode.com). The PublicNode Arc page lists it under Mainnet and the endpoint returns chain ID 5042. https://www.allnodes.com/ — https://builder.registrai.cc/ecosystem/allnodes/
- **AllUnity** (Stablecoin issuers, Deployed): Euro-backed (EURAU), Swiss franc-backed (CHFAU) and Swedish krona-backed (SEKAU) stablecoin issuer. It announced launching these stablecoins on Arc on 2026-09-16. https://allunity.com — https://builder.registrai.cc/ecosystem/allunity/
- **Amazon Web Services** (Infrastructure, Announced): Cloud computing provider. Listed among technology firms engaging with Arc in Circle's 2025-10-28 testnet announcement. https://aws.amazon.com — https://builder.registrai.cc/ecosystem/amazon-web-services/
- **Anchorage Digital** (Custody, Announced): Institutional crypto platform with a federally chartered digital asset bank in the US. Named as a custody provider for Arc in Circle's 2026-09-16 announcement. https://www.anchorage.com — https://builder.registrai.cc/ecosystem/anchorage/
- **Anthropic** (AI agents, Announced): AI developer behind the Claude models and Claude Agent SDK. Circle's 2025-10-28 testnet announcement lists AI-powered developer tools for Arc built on the Claude Agent SDK. https://www.anthropic.com — https://builder.registrai.cc/ecosystem/anthropic/
- **Apollo** (Asset managers, Announced): Asset manager and retirement solutions provider (Apollo Global Management, NYSE: APO). Named among capital markets firms engaging with Arc in Circle's 2025-10-28 testnet announcement. https://www.apollo.com — https://builder.registrai.cc/ecosystem/apollo/
- **Arc Spend** (Consumer apps, Live on mainnet): Independent web app that sells Bitrefill gift cards for USDC on Arc. Its live config points at Arc mainnet (chain ID 5042, rpc.mainnet.arc.io) with payments switched on. Not listed on arc.io/ecosystem; no Circle or Arc announcement found. https://arcspend.vercel.app — https://builder.registrai.cc/ecosystem/arc-spend/
- **Arcade** (Games and NFTs, Live on mainnet): Onchain gacha app on Arc Mainnet. Users pay 2 to 5 USDC per spin on a machine and receive tokens from its published reward table, with outcomes chosen by commit-reveal. https://www.myarcade.fun/ — https://builder.registrai.cc/ecosystem/arcade/
- **Archery** (DEXs, Live on mainnet): ve(3,3) exchange on Arc Mainnet with V2 and concentrated-liquidity (Slipstream) pools for USDC, EURC, cirBTC and WETH. https://archery.wtf/ — https://builder.registrai.cc/ecosystem/archery/
- **ArcLand** (Games and NFTs, Deployed): Digital land project for Arc with a supply of 10,000 lands. Contracts the Arc indices attribute to it are on Arc mainnet, but its site says minting has not opened and takes waitlist sign-ups only (checked 2026-10-25). https://arcland.app/ — https://builder.registrai.cc/ecosystem/arcland/
- **ArcLens** (Infrastructure, Live on mainnet): Arc ecosystem directory and data platform with project listings, campaigns, an explorer and a pay-per-call AI agent API over x402. Its README lists the ArcLensRegistry contract on Arc mainnet (chain ID 5042). https://arclenz.xyz — https://builder.registrai.cc/ecosystem/arclens/
- **Arclight** (DEXs, Live on mainnet): Non-custodial tool on Arc Mainnet that mints ladders of up to 32 concentrated-liquidity positions on Uniswap V3 and V4 in one transaction. Also runs an x402 payment facilitator. https://arclight.finance/ — https://builder.registrai.cc/ecosystem/arclight/
- **ArcLotls** (Games and NFTs, Live on mainnet): On-chain collectible protocol on Arc where users mine pixel axolotl NFTs with a proof-of-work search paid in USDC, and can evolve, fuse and regenerate them. Has a separate LOTL token with buybacks and burns. https://www.arclotls.com — https://builder.registrai.cc/ecosystem/arclotls/
- **arcpad.meme** (Launchpads, Deployed): Memecoin launchpad on Arc that launches tokens directly onto Uniswap V3 pools with locked liquidity. https://arcpad.meme/ — https://builder.registrai.cc/ecosystem/arcpad-meme/
- **Arctide** (DEXs, Live on mainnet): DEX and launchpad with programmable revenue distribution and social trading features, per its site description. https://arctide.app/ — https://builder.registrai.cc/ecosystem/arctide/
- **ArcTools** (Trading, Live on mainnet): Trading terminal for Arc that routes swaps across launchpads and DEX liquidity, settling in USDC. Its README also lists a launchpad, token locker, pay links, perpetuals and Telegram bots. https://arctools.fun/ — https://builder.registrai.cc/ecosystem/arctools/
- **Argus World** (Launchpads, Live on mainnet): Tax-token launchpad on Arc. Each launch mints its full supply into a single-sided Uniswap v4 position held by a locker with no withdrawal path, and a per-launch hook charges a tax on buys and sells. https://arguspad.io/ — https://builder.registrai.cc/ecosystem/argus/
- **ARK Launch** (Launchpads, Live on mainnet): Token launchpad on Arc that launches fixed-supply tokens into Uniswap V3 USDC pools with the LP position locked. Its repo lists Arc mainnet contracts deployed on 2026-09-16. https://ark-ai.xyz — https://builder.registrai.cc/ecosystem/ark-launch/
- **Arrays** (AI agents, Announced): Financial data API covering US equities, ETFs, macro, options, crypto and onchain data. Named among agentic-economy partners in Circle's 2026-09-16 Arc mainnet announcement. https://arrays.org/ — https://builder.registrai.cc/ecosystem/arrays/
- **Aster** (Trading, Announced): Perpetuals exchange offering crypto, stock, forex, commodity and prediction markets. Listed as an Arc ecosystem partner. https://www.asterdex.com/ — https://builder.registrai.cc/ecosystem/aster/
- **Astock** (Tokenization and RWA, Live on mainnet): Tokenized stocks project built on Arc. Its page titles it "tokenized stocks, built on Arc". https://astock.fi/ — https://builder.registrai.cc/ecosystem/arcstocks/
- **Augustus** (Banks, Announced): Bank for fintechs and banks, with USD and EUR accounts and stablecoin settlement next to Swift, ACH and SEPA. Listed as an Arc ecosystem partner. https://augustus.com/ — https://builder.registrai.cc/ecosystem/augustus/
- **Auros** (Market makers, Announced): Proprietary crypto trading firm providing market making, OTC and liquidity services. Named among market makers and OTCs in Circle's 2025-10-28 Arc testnet announcement and listed as an Arc ecosystem partner. https://auros.global/ — https://builder.registrai.cc/ecosystem/auros/
- **Avenia** (Stablecoin issuers, Announced): Brazilian payments and liquidity provider with an API for cross-border flows, including PIX. Named as issuer of the BRLA stablecoin among testnet participants in Circle's 2025-10-28 Arc announcement. https://avenia.io/ — https://builder.registrai.cc/ecosystem/avenia/
- **B2C2** (Market makers, Announced): Institutional digital asset liquidity provider offering OTC trading, market making and stablecoin swaps. Named among market makers and OTCs in Circle's 2025-10-28 Arc testnet announcement and listed as an Arc ecosystem partner. https://www.b2c2.com/ — https://builder.registrai.cc/ecosystem/b2c2/
- **Backpack** (Wallets, Live on mainnet): Self-custody wallet and centralized exchange offering crypto spot, perpetual futures and US stock trading. Its assets API lists USDC on Arc with deposits and withdrawals enabled. https://backpack.exchange/ — https://builder.registrai.cc/ecosystem/backpack/
- **Bank Frick** (Banks, Announced): Liechtenstein bank serving financial intermediaries and professional clients, with blockchain banking, fund and capital market services. Named among banks engaging with Arc in Circle's 2025-10-28 testnet announcement. https://www.bankfrick.li/ — https://builder.registrai.cc/ecosystem/bank-frick/
- **Bankr** (AI agents, Live on mainnet): Platform for AI agents with built-in wallets, trading and token launches. Its docs list Arc as a supported chain with USDC as gas, including token launches on Arc. https://bankr.bot — https://builder.registrai.cc/ecosystem/bankr/
- **basedbid** (Launchpads, Deployed): Permissionless multi-chain token launchpad with bonding curves, Flash Tokens and white-label Boards. Also deployed on Ethereum, BNB Chain, Base and Robinhood Chain. https://www.based.bid/ — https://builder.registrai.cc/ecosystem/basedbid/
- **BCW** (Infrastructure, Announced): Enterprise Web3, cloud and AI infrastructure firm offering node, validator and staking services. Named among ecosystem infrastructure and tooling partners in Circle's 2026-09-16 Arc mainnet announcement. https://www.bcw.group/ — https://builder.registrai.cc/ecosystem/bcw/
- **BDACS** (Stablecoin issuers, Live on mainnet): Korean digital asset custodian that issues KRW1, a won-pegged stablecoin backed 1:1 by bank deposits. BDACS's 2026-09-16 release says KRW1 is live on Arc mainnet. — https://builder.registrai.cc/ecosystem/bdacs/
- **BEACON Oracle** (Infrastructure, Live on mainnet): USDC/NGN price oracle: an off-chain reporter publishes the median of exchange and FX sources to a Chainlink-compatible contract. On Arc mainnet since 2026-10-29; 51 rounds from 2026-10-31 to 2026-11-01 07:25 UTC, then no update, so reads revert. Built with Arc Studio. https://beacon-oracle.vercel.app — https://builder.registrai.cc/ecosystem/beacon-oracle/
- **Beefy** (Asset managers, Live on mainnet): Yield aggregator that auto-compounds deposited tokens across chains. On Arc it runs concentrated-liquidity vaults on Uniswap pools, including USDC-EURC, with matching reward pools. https://beefy.com — https://builder.registrai.cc/ecosystem/beefy/
- **Binance** (Exchanges, Live on mainnet): Centralized crypto exchange. Arc's mainnet launch post (2026-09-16) lists Binance among the exchanges that are live on Arc. A third-party relay reports Binance opened USDC deposits on Arc the same day. https://www.binance.com — https://builder.registrai.cc/ecosystem/binance/
- **Binance Wallet** (Wallets, Live on mainnet): Binance's crypto wallet. Named among exchange and wallet providers enabling access to USDC on Arc in Circle's 2026-08-05 announcement, and among digital wallets in the 2026-09-16 mainnet announcement. — https://builder.registrai.cc/ecosystem/binance-wallet/
- **Birdeye** (Infrastructure, Announced): Token data platform covering prices, trades, charts and wallets across Solana, Sui, Ethereum and other EVM chains. Listed as an Arc ecosystem partner. https://birdeye.so — https://builder.registrai.cc/ecosystem/birdeye/
- **Bitget** (Exchanges, Live on mainnet): Centralized crypto exchange with spot and derivatives trading that supports USDC deposits and withdrawals on Arc. It opened USDC-ARC deposits on 2026-09-16 and withdrawals on 2026-09-17. https://www.bitget.com — https://builder.registrai.cc/ecosystem/bitget/
- **Bitget Wallet** (Wallets, Live on mainnet): Multichain crypto wallet from Bitget. Named among digital wallets in Circle's 2026-09-16 Arc mainnet announcement. https://web3.bitget.com — https://builder.registrai.cc/ecosystem/bitget-wallet/
- **BitGo** (Custody, Live on mainnet): Digital asset custodian. Supports Arc mainnet for self-custody MPC hot and cold wallets, custody MPC and Go Account, with USDC deposits and withdrawals and a Gas Tank for consolidation fees. https://www.bitgo.com — https://builder.registrai.cc/ecosystem/bitgo/
- **Bitrue** (Exchanges, Live on mainnet): Centralized crypto exchange. Listed as an Arc ecosystem partner. https://www.bitrue.com — https://builder.registrai.cc/ecosystem/bitrue/
- **Bitso** (Exchanges, Live on mainnet): Latin American crypto exchange; its stablecoin arm Juno issues MXNB. Named among digital asset exchanges in Circle's 2026-09-16 Arc mainnet announcement. https://bitso.com — https://builder.registrai.cc/ecosystem/bitso/
- **Bitvavo** (Exchanges, Live on mainnet): Dutch crypto exchange. Named among centralized exchanges engaging with Arc in Circle's 2025-10-28 testnet announcement and among digital asset exchanges in the 2026-09-16 mainnet announcement. — https://builder.registrai.cc/ecosystem/bitvavo/
- **Bitwise** (Asset managers, Deployed): Asset manager named among Arc's launch partners. Its Morpho curator page lists a Bitwise Premium RWA USDC vault on Arc. https://app.morpho.org/curator/bitwise — https://builder.registrai.cc/ecosystem/bitwise/
- **BlackRock** (Asset managers, Announced): Asset manager and issuer of BUIDL, a tokenized USD institutional liquidity fund. Named as a founding validator and as a BUIDL issuer in Circle's 2026-08-05 Arc announcement. https://www.blackrock.com — https://builder.registrai.cc/ecosystem/blackrock/
- **Blockaid** (Infrastructure, Live on mainnet): Onchain security provider that simulates and screens wallet transactions and classifies tokens; it covers Arc in MetaMask. Its 2026-09-16 blog post says it added Arc support at mainnet launch. https://www.blockaid.io/ — https://builder.registrai.cc/ecosystem/blockaid/
- **Blockdaemon** (Infrastructure, Live on mainnet): Node and RPC infrastructure provider. Its docs publish an Arc RPC API reference and state that both Arc mainnet and testnet are supported. https://www.blockdaemon.com — https://builder.registrai.cc/ecosystem/blockdaemon/
- **Blockradar** (Wallets, Live on mainnet): Wallet and settlement infrastructure with APIs that lets fintechs move stablecoins without building their own chain infrastructure. Listed as an Arc ecosystem partner. https://www.blockradar.co — https://builder.registrai.cc/ecosystem/blockradar/
- **BlockRun** (AI agents, Live on mainnet): Pay-per-call gateway to AI models and data APIs, paid in USDC on Arc through the x402 protocol. Callers need only a USDC wallet on Arc. https://blockrun.ai — https://builder.registrai.cc/ecosystem/blockrun/
- **Blockscout** (Infrastructure, Live on mainnet): Open-source blockchain explorer. Its blog states it is Arc's official block explorer, served at explorer.arc.io for mainnet and testnet. https://www.blockscout.com — https://builder.registrai.cc/ecosystem/blockscout/
- **BNY** (Banks, Announced): Global financial services company. Named among capital markets firms engaging with Arc in Circle's 2025-10-28 announcement, and among global banks with access to Arc's private mainnet in Circle's 2026-09-16 mainnet announcement. https://www.bny.com — https://builder.registrai.cc/ecosystem/bny/
- **Bonker** (Launchpads, Live on mainnet): Token launchpad that deploys ERC-20 tokens with Uniswap v4 pools, locked liquidity and creator rewards. Runs on Base, Robinhood Chain and Arc, with its factory and lockers deployed on Arc. https://bonker.wtf — https://builder.registrai.cc/ecosystem/bonker/
- **Brex** (Payments, Announced): Finance software platform offering corporate cards, banking and expense management. Named among payments-focused firms engaging with Arc in Circle's 2025-10-28 announcement. https://www.brex.com — https://builder.registrai.cc/ecosystem/brex/
- **Bridge** (Payments, Announced): Stablecoin infrastructure and API platform for developers, covering orchestration, issuance, cards and wallets. Listed under infrastructure providers in Circle's 2025-10-28 Arc announcement. https://bridge.xyz — https://builder.registrai.cc/ecosystem/bridge/
- **Bron** (Wallets, Live on mainnet): Non-custodial MPC wallet for crypto and tokenized assets, with business and AI-agent wallets. Lists Arc among its supported networks and was named among digital wallets in Circle's 2025-10-28 Arc announcement. https://bron.org — https://builder.registrai.cc/ecosystem/bron/
- **BTG Pactual** (Banks, Announced): Brazilian investment bank. Named among banks engaging with Arc in Circle's 2025-10-28 announcement, and among global banks with access to Arc's private mainnet in the 2026-09-16 mainnet announcement. https://www.btgpactual.com — https://builder.registrai.cc/ecosystem/btg-pactual/
- **Buglefamily** (Launchpads, Deployed): Token launch and liquidity platform on Arc built on V3-style pools with permanently locked initial liquidity, as described on DefiLlama. Its pool factory is deployed on Arc. — https://builder.registrai.cc/ecosystem/buglefamily/
- **Bungee** (Bridges and cross-chain, Live on mainnet): Cross-chain swap and routing product from Socket. Socket's deployments file lists OpenRouter, BungeeReceiver and CalldataExecutor contracts on Arc (chain 5042). https://bungee.exchange — https://builder.registrai.cc/ecosystem/bungee/
- **BVNK** (Payments, Announced): Stablecoin payments infrastructure for businesses. Named among global payments firms and fintechs that will enable stablecoin settlement on Arc in Arc's 2026-09-16 mainnet post. https://www.bvnk.com — https://builder.registrai.cc/ecosystem/bvnk/
- **Bybit** (Exchanges, Live on mainnet): Crypto exchange. Its 2026-09-17 announcement opened USDC deposits and withdrawals on Arc. https://www.bybit.com — https://builder.registrai.cc/ecosystem/bybit/
- **Cactus Custody** (Custody, Announced): Qualified custodian providing custody services for institutions. Listed as an Arc ecosystem partner on arc.io. — https://builder.registrai.cc/ecosystem/cactus-custody/
- **Careem** (Payments, Announced): Regional super app for rides, food and grocery delivery and payments. Named among payments-focused firms engaging with Arc in Circle's 2025-10-28 announcement. https://www.careem.com — https://builder.registrai.cc/ecosystem/careem/
- **Catena Labs** (AI agents, Live on mainnet): Banking and governance platform for AI agents, covering payments and treasury. Named among payments firms in Circle's 2025-10-28 and 2026-09-16 Arc announcements. https://catena.com — https://builder.registrai.cc/ecosystem/catena-labs/
- **Ceffu** (Custody, Announced): Institutional digital asset platform offering custody and liquidity solutions. Named among custody providers for digital assets on Arc in Circle's 2026-09-16 mainnet announcement. https://www.ceffu.com — https://builder.registrai.cc/ecosystem/ceffu/
- **Centrifuge** (Tokenization and RWA, Announced): Platform for tokenizing, managing and distributing real-world asset funds onchain. Named among yield providers in Circle's 2025-10-28 announcement, and in partnership with New York Life Investment Management in the 2026-09-16 mainnet announcement. https://centrifuge.io — https://builder.registrai.cc/ecosystem/centrifuge/
- **Chainalysis** (Infrastructure, Announced): Blockchain data and analytics company serving government agencies, crypto businesses and financial institutions. Listed as an Arc ecosystem partner. https://www.chainalysis.com/ — https://builder.registrai.cc/ecosystem/chainalysis/
- **Chainlink** (Infrastructure, Live on mainnet): Decentralized oracle and cross-chain messaging network. Its CCIP directory lists Arc Network Mainnet with a router, token pool factory, RMN proxy and 4 supported tokens. https://chain.link — https://builder.registrai.cc/ecosystem/chainlink/
- **Chronicle Labs** (Infrastructure, Announced): Provider of decentralized, verifiable blockchain oracles and data feeds. Listed as an Arc ecosystem partner. — https://builder.registrai.cc/ecosystem/chronicle-labs/
- **Circle Gateway** (Bridges and cross-chain, Live on mainnet): Circle's unified USDC balance service for moving USDC across chains. Circle's docs list Arc mainnet as a supported chain (domain 26) with GatewayWallet and GatewayMinter contracts deployed. https://www.circle.com/gateway — https://builder.registrai.cc/ecosystem/circle-gateway/
- **Clearbank** (Banks, Announced): Bank named among the banks and asset managers engaging with Arc in Circle's 2025-10-28 public testnet announcement. https://www.clear.bank/ — https://builder.registrai.cc/ecosystem/clearbank/
- **Cloudflare** (Infrastructure, Announced): Internet infrastructure company. Named among the payments providers and platforms engaging with Arc in Circle's 2025-10-28 public testnet announcement. https://www.cloudflare.com/ — https://builder.registrai.cc/ecosystem/cloudflare/
- **Coinbase** (Exchanges, Announced): Crypto exchange and custody platform for buying, selling, transferring and storing crypto. Named as a digital asset exchange in Circle's 2025-10-28 and 2026-09-16 Arc announcements. https://www.coinbase.com/ — https://builder.registrai.cc/ecosystem/coinbase/
- **Coincheck** (Exchanges, Announced): Japanese crypto exchange for buying and selling cryptocurrency. Named as a centralized exchange engaging with Arc in Circle's 2025-10-28 public testnet announcement. https://www.coincheck.com/en/ — https://builder.registrai.cc/ecosystem/coincheck/
- **CoinGecko** (Infrastructure, Announced): Crypto market data and analysis platform. Listed as an Arc ecosystem partner. https://www.coingecko.com/ — https://builder.registrai.cc/ecosystem/coingecko/
- **CoinMarketCap** (Infrastructure, Live on mainnet): Crypto market data site; it tracks Arc as a DexScan network (chain ID 5042) and lists an Arc Ecosystem token category. That category lists Arc tokens such as ARGUS and FAZE alongside USDC and EURC. https://coinmarketcap.com/ — https://builder.registrai.cc/ecosystem/coinmarketcap/
- **Coins.PH** (Stablecoin issuers, Live on mainnet): Philippines e-wallet and crypto app. Circle's 2025-10-28 testnet announcement lists PHPC, a Philippine peso stablecoin issued by Coins.PH, among assets joining Arc for testnet. https://coins.ph/ — https://builder.registrai.cc/ecosystem/coins-ph/
- **Commerzbank** (Banks, Announced): German bank serving corporate clients. Named among the banks and asset managers engaging with Arc in Circle's 2025-10-28 public testnet announcement. https://www.commerzbank.com/ — https://builder.registrai.cc/ecosystem/commerzbank/
- **Copper** (Custody, Announced): Digital asset infrastructure provider offering custody, prime services and collateral management. Named as a custody provider for Arc in Circle's 2025-10-28 and 2026-09-16 announcements. https://copper.co/ — https://builder.registrai.cc/ecosystem/copper/
- **Copperx** (Payments, Announced): Stablecoin platform for accepting stablecoin payments, opening financial accounts and sending money across borders. Listed as an Arc ecosystem partner. https://www.copperx.io/ — https://builder.registrai.cc/ecosystem/copperx/
- **Corpay** (Payments, Announced): Global spend management and cross-border payments company. Named among the payments providers engaging with Arc in Circle's 2025-10-28 public testnet announcement. https://www.corpay.com/ — https://builder.registrai.cc/ecosystem/corpay/
- **Crossmint** (Developer tools, Live on mainnet): Stablecoin and wallet infrastructure for enterprises. Its supported-chains table lists Arc with mainnet label 'arc': wallets are self-serve, while checkout, onramp and tokenization on Arc go through sales. https://www.crossmint.com — https://builder.registrai.cc/ecosystem/crossmint/
- **Cumberland** (Market makers, Announced): Institutional liquidity provider for cryptoassets, offering OTC spot, options and futures trading. Named as a market maker in Circle's 2025-10-28 Arc testnet announcement and among credit-market supporters in the 2026-09-16 mainnet announcement. https://www.cumberland.io/ — https://builder.registrai.cc/ecosystem/cumberland/
- **Curve** (DEXs, Live on mainnet): Automated market maker for stablecoin and similar-value asset swaps. Announced as live on Arc on 2026-09-17, with stableswap, tricrypto and twocrypto factories and a router deployed. https://curve.fi — https://builder.registrai.cc/ecosystem/curve/
- **Cycles** (Payments, Live on mainnet): Open clearing protocol that lets users clear debts with each other using any currency or credit. Its Cycles Pay app lets businesses hold USDC, invoice and pay on Arc; the app is in beta and needs an invite code. https://cycles.money/ — https://builder.registrai.cc/ecosystem/cycles/
- **DCent** (Wallets, Live on mainnet): Maker of a fingerprint-secured hardware wallet. Listed as an Arc ecosystem partner. https://dcentwallet.com/ — https://builder.registrai.cc/ecosystem/dcent/
- **DefiLlama** (Infrastructure, Live on mainnet): DeFi data aggregator that tracks Arc as a chain (chain ID 5042) with TVL and protocol listings. Its chains API listed Arc with about $584M TVL on 2026-10-31. https://defillama.com/ — https://builder.registrai.cc/ecosystem/defillama/
- **Definitive** (DEXs, Announced): Non-custodial trading platform with a mobile app, web terminal and API, offering order types and cross-chain routing. Listed as an Arc ecosystem partner. https://www.definitive.fi/ — https://builder.registrai.cc/ecosystem/definitive/
- **Deutsche Bank** (Banks, Announced): German bank. Named among the banks and asset managers engaging with Arc in Circle's 2025-10-28 testnet announcement. https://www.db.com/ — https://builder.registrai.cc/ecosystem/deutsche-bank/
- **DexFi Aggregator** (Asset managers, Deployed): Yield aggregator with automated vaults that manage Uniswap v3 and v4 liquidity positions. DefiLlama lists it with a small amount of USDC and other token liquidity on Arc. https://dexfi.com/ — https://builder.registrai.cc/ecosystem/dexfi-aggregator/
- **DFNS** (Wallets, Live on mainnet): Wallet-as-a-service and key management platform for banks, fintechs and businesses. Listed as an Arc ecosystem partner; its documentation lists Arc in the Mainnet column of supported networks. https://dfns.co/ — https://builder.registrai.cc/ecosystem/dfns/
- **Dialectic** (Lending, Announced): Crypto investment group working on agentic DeFi, automated yield and venture. Named in Circle's 2026-09-16 announcement among those supporting Arc credit markets in different capacities. https://dialectic.com/ — https://builder.registrai.cc/ecosystem/dialectic/
- **Digital Garage** (Payments, Announced): Japanese company running a payment platform business, marketing and investment; its subsidiary Crypto Garage provides institutional blockchain financial services. Named among global payments firms in Circle's 2026-09-16 announcement. https://www.garage.co.jp/en/ — https://builder.registrai.cc/ecosystem/digital-garage/
- **Dinari** (Tokenization and RWA, Announced): Tokenized securities platform issuing dShares, tokens backed 1:1 by U.S. stocks and ETFs. Announced dShares for Arc on 2026-09-16. https://dinari.com/ — https://builder.registrai.cc/ecosystem/dinari/
- **dLocal** (Payments, Announced): Payments company offering pay-ins and payouts in emerging markets through one API. Named among payments firms engaging with Arc in Circle's 2025-10-28 testnet announcement. https://www.dlocal.com/ — https://builder.registrai.cc/ecosystem/dlocal/
- **Dmall** (Payments, Announced): Asia-Pacific retail digitalization company providing POS, supply chain and member marketing services to retailers. Named among payments and e-commerce firms engaging with Arc in Circle's 2025-10-28 testnet announcement. https://www.dmall.com/ — https://builder.registrai.cc/ecosystem/dmall/
- **Doppler Finance** (Asset managers, Announced): Yield platform with vaults for XRP and RLUSD that allocate deposits to strategies such as arbitrage and basis trading. Listed as an Arc ecosystem partner; its site and docs do not mention Arc. https://doppler.finance/ — https://builder.registrai.cc/ecosystem/doppler-finance/
- **dRPC** (Infrastructure, Live on mainnet): Provider of RPC endpoints and blockchain data infrastructure. Its site lists Arc Mainnet and Arc Testnet RPC endpoints on its chainlist. https://drpc.org — https://builder.registrai.cc/ecosystem/drpc/
- **DTCC** (Validators, Announced): Post-trade market infrastructure operator for securities. Named in Circle's 2026-08-05 announcement as a member of Arc's founding validator cohort. https://www.dtcc.com — https://builder.registrai.cc/ecosystem/dtcc/
- **Dune** (Infrastructure, Live on mainnet): Onchain data query platform; it indexes Arc under the arc schema (blocks, transactions, logs, traces, decoded contracts). Its docs list Arc chain ID 5042 (mainnet). https://dune.com/ — https://builder.registrai.cc/ecosystem/dune/
- **Dynamic** (Developer tools, Announced): Wallet infrastructure SDK covering authentication, smart wallets and key management. Named among developer tools in Circle's 2025-10-28 Arc public testnet announcement. https://www.dynamic.xyz — https://builder.registrai.cc/ecosystem/dynamic/
- **DYOR Swap** (DEXs, Live on mainnet): Multi-chain AMM DEX for token swaps and liquidity pools, with a pool factory on Arc. DefiLlama lists Arc among its chains, and its app config names factory 0x942b...5c10 on Arc mainnet (chain ID 5042), which holds 50 pairs. https://dyorswap.finance — https://builder.registrai.cc/ecosystem/dyor-swap/
- **Ebanx** (Payments, Announced): Cross-border payments provider for local markets in Latin America, Asia and Africa. Named among payments companies engaging with Arc in Circle's 2025-10-28 testnet announcement. https://www.ebanx.com — https://builder.registrai.cc/ecosystem/ebanx/
- **Eco** (Bridges and cross-chain, Deployed): Stablecoin execution network; Eco Routes moves USDC across chains through intents that solvers fill. Its Portal contract (v2.10.0) is on Arc mainnet; its routes-cli adds Arc as a destination on staging solvers (2026-09-22). https://eco.com/ — https://builder.registrai.cc/ecosystem/eco/
- **edgeX** (Trading, Live on mainnet): Decentralized exchange for perpetual futures across FX, US stocks, commodities and crypto. On Arc it lists over 150 perpetual pairs margined and settled in USDC. https://www.edgex.exchange — https://builder.registrai.cc/ecosystem/edgex/
- **Elliptic** (Infrastructure, Announced): Blockchain analytics and compliance software for crypto and digital assets. Named among infrastructure participants in Circle's 2025-10-28 Arc public testnet announcement. https://www.elliptic.co — https://builder.registrai.cc/ecosystem/elliptic/
- **Emirates NBD** (Banks, Announced): Bank listed on the Dubai Financial Market. Named among banks and asset managers engaging with Arc in Circle's 2025-10-28 testnet announcement. https://www.emiratesnbd.com — https://builder.registrai.cc/ecosystem/emirates-nbd/
- **ether.fi** (Consumer apps, Live on mainnet): Financial account app for holding, earning, borrowing, spending and trading crypto, tokenized stocks and metals. Listed as an Arc ecosystem partner. https://www.ether.fi — https://builder.registrai.cc/ecosystem/ether-fi/
- **Euler Finance** (Lending, Announced): Modular lending infrastructure for lending, borrowing and launching lending markets. Named in Circle's 2025-10-28 testnet announcement, which spells it "Eular Finance", among DEX participants. https://euler.finance — https://builder.registrai.cc/ecosystem/euler-finance/
- **Exodus** (Wallets, Announced): Crypto wallet with desktop and mobile apps. Named among digital wallets connecting to Arc in Circle's 2025-10-28 testnet announcement. https://www.exodus.com — https://builder.registrai.cc/ecosystem/exodus/
- **Extended** (Trading, Live on mainnet): Perpetuals exchange for crypto and TradFi markets under one margin account, settling on Arc with USDC collateral. Its docs say it migrated from Starknet to Arc on 2026-10-22. https://extended.exchange — https://builder.registrai.cc/ecosystem/extended/
- **FalconX** (Trading, Announced): Institutional prime brokerage offering trading, financing and custody for digital assets. Named among DeFi protocols and capital allocators in Circle's 2026-08-05 announcement of apps and services for Arc. https://www.falconx.io — https://builder.registrai.cc/ecosystem/falconx/
- **Fast** (Payments, Live on mainnet): Payments network for people and AI agents; its AllSet bridge moves USDC between EVM chains and Fast. Its CLI mainnet config bundles Arc (chain 5042) with an AllSet bridge contract that holds USDC on Arc. https://fast.xyz/ — https://builder.registrai.cc/ecosystem/fast/
- **FAZE** (Launchpads, Live on mainnet): Token launchpad on Arc with bonding-curve launches that graduate into locked Uniswap v4 pools; fees are collected in USDC. Its contracts are deployed on Arc mainnet. https://faze.fun — https://builder.registrai.cc/ecosystem/faze/
- **Figment** (Infrastructure, Live on mainnet): Staking and validator infrastructure provider. It states it has run a validator on Arc since testnet and offers Managed Validator Services to select institutions on Arc, announced at mainnet launch on 2026-09-16. https://www.figment.io — https://builder.registrai.cc/ecosystem/figment/
- **Fireblocks** (Custody, Announced): Digital asset custody and stablecoin infrastructure provider. Named among custody providers in Circle's 2026-09-16 Arc mainnet announcement, and among wallet providers in the testnet announcement. https://www.fireblocks.com — https://builder.registrai.cc/ecosystem/fireblocks/
- **First Abu Dhabi Bank** (Banks, Announced): UAE bank listed as FAB (ADX). Named among banks and financial institutions engaging with Arc in Circle's 2025-10-28 testnet announcement. https://www.bankfab.com — https://builder.registrai.cc/ecosystem/first-abu-dhabi-bank/
- **FirstRand Bank** (Banks, Announced): South African bank listed as FirstRand Bank (FSR:JSE). Named among banks and financial institutions engaging with Arc in Circle's 2025-10-28 testnet announcement. https://www.firstrand.co.za — https://builder.registrai.cc/ecosystem/firstrand-bank/
- **FIS** (Payments, Announced): Fintech company providing technology for storing, moving and investing money. Named among payments and fintech companies engaging with Arc in Circle's 2025-10-28 testnet announcement. https://www.fisglobal.com — https://builder.registrai.cc/ecosystem/fis/
- **Fiserv** (Payments, Announced): Fintech and payments company with solutions for banking, commerce, merchant acquiring, billing and point-of-sale. Named among financial institutions engaging with Arc in Circle's 2025-10-28 testnet announcement. https://www.fiserv.com — https://builder.registrai.cc/ecosystem/fiserv/
- **Flipt.fun** (Launchpads, Live on mainnet): Token launchpad on Arc built on bonding curves. Curve buyers hold a position that earns a share of pool fees after graduation, and leaving it (unbonding) takes 90 seconds and is public. https://flipt.fun/ — https://builder.registrai.cc/ecosystem/flipt-fun/
- **Fluid** (Lending, Announced): DeFi protocol by Instadapp for lending and borrowing. Named among DEXs engaging with Arc in Circle's 2025-10-28 testnet announcement and listed as an Arc ecosystem partner. https://fluid.io — https://builder.registrai.cc/ecosystem/fluid/
- **Foci** (Launchpads, Live on mainnet): Token launchpad on Arc using bonding curves; graduated tokens move into locked Uniswap V4 positions, per its DefiLlama listing (category Launchpad, chain Arc). https://foci.family/ — https://builder.registrai.cc/ecosystem/foci/
- **fomo** (Trading, Announced): Cross-chain trading app. Named in Arc's 2026-09-16 mainnet announcement among the day-one trading infrastructure. https://fomo.family/ — https://builder.registrai.cc/ecosystem/fomo/
- **Fordefi** (Custody, Live on mainnet): Institutional MPC wallet and custody platform with a browser extension for dapps. Its supported-blockchains docs list Arc among its EVM chains, separate from the testnets it labels. https://fordefi.com/ — https://builder.registrai.cc/ecosystem/fordefi/
- **Forte AUD** (Stablecoin issuers, Live on mainnet): AUDF, an Australian dollar stablecoin issued by Forte Securities Australia Pty Limited (AFSL 492490). Its site lists Arc among AUDF networks; the token on Arc had about 301,000 AUDF supply on 2026-10-31. https://www.forteaud.com/ — https://builder.registrai.cc/ecosystem/forte-aud/
- **Forte Securities** (Trading, Announced): London inter-dealer broker and OTF operator for fixed income, equity derivatives and FX (FCA FRN 478424). Listed as an Arc ecosystem partner; its own site does not mention Arc. https://fortesecurities.com/ — https://builder.registrai.cc/ecosystem/forte-securities/
- **frenlaunch** (Launchpads, Deployed): Token launchpad tracked on DefiLlama for Arc and Robinhood Chain. Tokens launch on a bonding curve and graduate into a Uniswap v4 pool with locked liquidity. — https://builder.registrai.cc/ecosystem/frenlaunch/
- **Fuci** (AI agents, Deployed): AI agent project on Arc, tracked on DefiLlama. Agents hold a USDC wallet and an ERC-8004 identity, are hired through an escrow contract, and tokens can be launched paired with $FUCI. — https://builder.registrai.cc/ecosystem/fuci/
- **Fun.xyz** (Developer tools, Announced): Payments infrastructure provider offering deposit, withdrawal, orchestration and checkout products for moving funds between crypto and fiat. Listed under developer tools in Circle's 2025-10-28 Arc public testnet announcement. https://fun.xyz — https://builder.registrai.cc/ecosystem/fun-xyz/
- **Galaxy** (Market makers, Deployed): Digital assets and AI data center firm with trading, lending, asset management, custody and staking businesses. Named as an Arc founding validator and market maker; DefiLlama lists its vault curation product on Arc. https://www.galaxy.com — https://builder.registrai.cc/ecosystem/galaxy/
- **Gate** (Exchanges, Live on mainnet): Centralized crypto exchange. It announced on 2026-09-16 support for USDC deposits and withdrawals on the Arc network. https://www.gate.com — https://builder.registrai.cc/ecosystem/gate/
- **Gate Web3** (Wallets, Live on mainnet): Gate's self-custodial multichain wallet, separate from the Gate exchange. Named among digital wallets in Circle's 2026-09-16 Arc mainnet announcement; Gate said on 2026-09-15 that Gate Wallet supports Arc assets and DApps. https://web3.gate.com — https://builder.registrai.cc/ecosystem/gate-web3/
- **Gauntlet** (Lending, Announced): Yield curator for onchain vault strategies. Named in Arc's 2026-09-16 mainnet announcement among firms supporting Arc credit markets, including through curated vault strategies. https://www.gauntlet.xyz/ — https://builder.registrai.cc/ecosystem/gauntlet/
- **Glidepay** (Consumer apps, Live on mainnet): Cash App-style stablecoin app on Arc with email or Google sign-in and Circle developer-controlled smart accounts (Circle holds the keys). Its launch note says it went live on Arc mainnet on 2026-09-24. Universal Receive is not live yet. https://glidepay.cash — https://builder.registrai.cc/ecosystem/glidepay/
- **Global Payments** (Validators, Announced): Payments technology company. Named in Circle's 2026-08-05 announcement as an Arc founding validator; the mainnet announcement lists the validator as Worldpay (now Global Payments). https://www.globalpayments.com — https://builder.registrai.cc/ecosystem/global-payments/
- **Goldman Sachs** (Banks, Announced): Global investment bank and asset manager. Named among banks and asset managers engaging with Arc in Circle's 2025-10-28 public testnet announcement, which quotes its head of digital assets on programmable settlement. https://www.goldmansachs.com — https://builder.registrai.cc/ecosystem/goldman-sachs/
- **Goldsky** (Infrastructure, Live on mainnet): Blockchain data and automation platform. Its docs list Arc Mainnet and Arc Testnet support for Turbo pipelines, Edge RPC, Compose and Subgraphs. https://goldsky.com — https://builder.registrai.cc/ecosystem/goldsky/
- **GSR** (Market makers, Announced): Crypto trading firm and liquidity provider offering market making and trading solutions. Named as a market maker in Circle's testnet announcement and among day-one DeFi liquidity participants in the 2026-08-05 announcement. https://www.gsr.io — https://builder.registrai.cc/ecosystem/gsr/
- **HashFly** (Games and NFTs, Live on mainnet): NFT collection of 7,777 pixel flies created by browser proof-of-work mining on Arc, with traits derived by the contract from each mined hash. Its site also lists an OpenSea collection and a $FLY token. https://hashfly.fun/ — https://builder.registrai.cc/ecosystem/hashfly/
- **Hashkey** (Exchanges, Announced): Crypto exchange. Named among centralized exchanges in Circle's 2025-10-28 Arc public testnet announcement and listed in Arc's ecosystem directory. The HashKey Exchange site describes an SFC-licensed Hong Kong platform. https://www.hashkey.com — https://builder.registrai.cc/ecosystem/hashkey/
- **Hecto Financial** (Payments, Announced): South Korean fintech and payment service provider offering virtual accounts, payment gateway and prepaid services. Listed among payments and fintech firms engaging with Arc in Circle's 2025-10-28 testnet announcement. https://www.hectofinancial.co.kr — https://builder.registrai.cc/ecosystem/hecto-financial/
- **Hecto Innovation** (Wallets, Announced): Affiliate of the South Korean Hecto Group, which operates in IT, fintech and healthcare. Named as a digital wallet provider in Circle's 2025-10-28 Arc public testnet announcement. https://www.hecto.co.kr — https://builder.registrai.cc/ecosystem/hecto-innovation/
- **Hibachi** (Trading, Announced): Stablecoin-native FX exchange with a live orderbook, starting with FX perpetuals. Named among onchain trading and liquidity protocols in Circle's 2026-09-16 Arc mainnet announcement. https://hibachi.xyz — https://builder.registrai.cc/ecosystem/hibachi/
- **HIFI** (Payments, Live on mainnet): API platform for moving money across fiat rails and stablecoins, covering cross-border payments, payouts and stablecoin minting. Listed as an Arc ecosystem partner. https://www.hifi.com — https://builder.registrai.cc/ecosystem/hifi/
- **Hinkal** (Infrastructure, Deployed): Privacy infrastructure provider for confidential stablecoin payments, with wallet and integration products. DefiLlama lists Arc among the chains it covers. https://hinkal.io — https://builder.registrai.cc/ecosystem/hinkal/
- **HSBC** (Banks, Announced): Global bank and financial services group headquartered in London. Named among the banks with access to Arc's private mainnet in Circle's 2026-09-16 announcement, and quoted in the 2025-10-28 testnet announcement on cross-border payments. https://www.hsbc.com — https://builder.registrai.cc/ecosystem/hsbc/
- **Huma Finance** (Tokenization and RWA, Announced): Protocol that offers stablecoin yield backed by real-world payment flows. Named in Arc's 2026-09-16 blog among firms bringing tokenized financial products onchain with Arc. https://www.huma.finance — https://builder.registrai.cc/ecosystem/huma-finance/
- **HumanLayer** (AI agents, Live on mainnet): USDC bounty marketplace: buyers post research and data tasks, escrow the reward and pay workers when a submission is approved, with a 2% fee. Built with Arc Studio; contract on Arc mainnet since 2026-10-30, with an agent API. https://agent-human-layer.vercel.app — https://builder.registrai.cc/ecosystem/humanlayer/
- **IMC** (Market makers, Announced): Trading firm focused on trading, technology and quantitative research. Named among the market makers and OTC firms providing liquidity access in Circle's 2025-10-28 Arc testnet announcement. https://www.imc.com — https://builder.registrai.cc/ecosystem/imc/
- **imToken** (Wallets, Live on mainnet): Self-custody crypto wallet supporting tokens on major EVM and layer-2 networks. Listed among wallets and consumer apps connecting Arc's markets to existing users in Arc's 2026-09-16 blog. https://token.im — https://builder.registrai.cc/ecosystem/imtoken/
- **Intercontinental Exchange** (Tokenization and RWA, Announced): Operator of exchanges, clearing houses and market data services. Named in Circle's 2026-08-05 and 2026-09-16 announcements as part of Arc's founding validator cohort, and as a capital markets firm engaging with Arc in the 2025-10-28 testnet announcement. https://www.ice.com — https://builder.registrai.cc/ecosystem/intercontinental-exchange/
- **Invesco** (Asset managers, Announced): Global investment management firm. Named among the banks, asset managers and insurers in Circle's 2025-10-28 Arc testnet announcement, where it described exploring blockchain infrastructure for tokenizing funds and assets. https://www.invesco.com — https://builder.registrai.cc/ecosystem/invesco/
- **Janus Henderson** (Asset managers, Announced): Global asset manager. Named among asset managers and RWA issuers in Circle's 2026-09-16 announcement; Arc's blog lists its JAAA and JTRSY funds among tokenized assets on Arc. https://www.janushenderson.com — https://builder.registrai.cc/ecosystem/janus-henderson/
- **JCB** (Payments, Announced): Japanese international payment card brand. Named among the global payments firms enabling stablecoin settlement on Arc in Circle's 2026-09-16 announcement. https://www.global.jcb — https://builder.registrai.cc/ecosystem/jcb/
- **JPYC Inc.** (Stablecoin issuers, Deployed): Issuer of JPYC, a Japanese yen stablecoin. Named as a JPYC issuer joining Arc at the testnet launch; a JPYC token contract is deployed on Arc mainnet and had zero total supply when checked on 2026-10-20. — https://builder.registrai.cc/ecosystem/jpyc-inc/
- **Juno** (Stablecoin issuers, Live on mainnet): Stablecoin issuer, a Bitso company, behind MXNB, a token pegged 1:1 to the Mexican peso. MXNB is deployed on Arc mainnet with a non-zero total supply. https://buildwithjuno.com/ — https://builder.registrai.cc/ecosystem/juno/
- **Kairo** (Trading, Live on mainnet): Non-custodial app on Arc for token swaps, perpetuals, prediction markets, liquidity pools, lending and token creation. Its contracts are deployed on Arc mainnet. https://kairo.market/ — https://builder.registrai.cc/ecosystem/kairo/
- **Kaleido** (Infrastructure, Announced): Enterprise blockchain platform for deploying networks and managing digital assets and tokenization. Named among the ecosystem infrastructure and tooling providers supporting builders on Arc in Circle's 2026-09-16 announcement. https://www.kaleido.io — https://builder.registrai.cc/ecosystem/kaleido/
- **Kaleido DeFi-OS** (DEXs, Live on mainnet): DeFi suite on Arc with concentrated-liquidity swap pools from its own factory and a peer-to-peer lending market where borrowers post collateral such as EURC and cirBTC against native USDC. DefiLlama tracks both on Arc. https://kaleidofi.xyz — https://builder.registrai.cc/ecosystem/kaleido-defi/
- **Keyrock** (Market makers, Announced): Announced as a market maker and liquidity provider in the Arc ecosystem on 2025-10-28. The mainnet launch release lists Keyrock among firms supporting curated vault strategies and the supply of USDC and EURC for lending. https://keyrock.com/ — https://builder.registrai.cc/ecosystem/keyrock/
- **Kite AI** (AI agents, Announced): Payment infrastructure for autonomous AI agents with native stablecoin settlement. Named among the agentic-economy builders in Circle's 2026-09-16 announcement and among early services using Agent Stack to bring agents to Arc. https://www.gokite.ai — https://builder.registrai.cc/ecosystem/kite-ai/
- **KPK** (Asset managers, Live on mainnet): Noncustodial onchain asset manager that curates DeFi vaults and tokenised funds. It curates the KPK wARS Yield vault on Arc, a Morpho vault for Ripio's wARS. https://kpk.io — https://builder.registrai.cc/ecosystem/kpk/
- **Kraken** (Exchanges, Live on mainnet): Crypto exchange. Supports USDC deposits and withdrawals on Arc, announced live on 2026-09-16. https://kraken.com — https://builder.registrai.cc/ecosystem/kraken/
- **KuCoin** (Exchanges, Live on mainnet): Crypto exchange. Supports USDC deposits on the Arc mainnet network, announced on 2026-09-17. https://www.kucoin.com — https://builder.registrai.cc/ecosystem/kucoin/
- **KuCoin Web3** (Wallets, Live on mainnet): KuCoin's self-custodial multichain web3 wallet, separate from the KuCoin exchange. Named among digital wallets in Circle's 2026-09-16 Arc mainnet announcement and Arc's mainnet post. https://www.kucoin.com/web3 — https://builder.registrai.cc/ecosystem/kucoin-web3/
- **KyberSwap** (DEXs, Live on mainnet): DEX aggregator with swap, limit order and cross-chain swap products. Its blog describes Arc as a destination chain, with 23 source networks listed in the cross-chain selector. https://www.kyberswap.com/ — https://builder.registrai.cc/ecosystem/kyberswap/
- **Kyobo Life** (Tokenization and RWA, Announced): South Korean life insurance company. Named in Circle's 2025-10-28 Arc public testnet announcement among financial institutions participating. https://www.kyobo.com — https://builder.registrai.cc/ecosystem/kyobo-life/
- **Lagoon** (Asset managers, Live on mainnet): Vault infrastructure for onchain asset management built on the ERC-7540 asynchronous vault standard. Its docs list a vault factory, protocol registry and v0.6.0 logic contract on Arc. https://lagoon.finance — https://builder.registrai.cc/ecosystem/lagoon/
- **LayerZero** (Bridges and cross-chain, Live on mainnet): Cross-chain messaging protocol. Its V2 EndpointV2 and ULN302 message libraries are deployed on Arc mainnet under endpoint ID 30417. https://layerzero.network/ — https://builder.registrai.cc/ecosystem/layerzero/
- **LBank** (Exchanges, Live on mainnet): Centralised cryptocurrency exchange offering spot and futures trading. Listed as an Arc ecosystem partner. https://www.lbank.com — https://builder.registrai.cc/ecosystem/lbank/
- **Lead Bank** (Banks, Announced): Named among global banks with access to Arc in Circle's 2026-09-16 mainnet announcement. Lead Bank provides API-driven banking infrastructure for fintech companies. https://www.lead.bank — https://builder.registrai.cc/ecosystem/lead-bank/
- **Ledger** (Wallets, Live on mainnet): Hardware wallet maker for self-custody of crypto assets. Named as a digital wallet provider in Circle's Arc announcements of 2025-10-28 and 2026-09-16. https://www.ledger.com — https://builder.registrai.cc/ecosystem/ledger/
- **LI.FI** (Bridges and cross-chain, Live on mainnet): Liquidity aggregation and cross-chain execution infrastructure for DEXs and bridges. Its LiFiDiamond contract and facets are deployed on Arc mainnet, and the mainnet launch release names it among onchain trading and crosschain protocols. https://li.fi/ — https://builder.registrai.cc/ecosystem/li-fi/
- **LianLian** (Payments, Announced): Cross-border payments platform serving e-commerce and B2B trade merchants. Named in Circle's 2025-10-28 Arc public testnet announcement among payments and fintech participants. https://global.lianlian.com — https://builder.registrai.cc/ecosystem/lianlian/
- **Lift** (Launchpads, Live on mainnet): Token launchpad that deploys tokens on Arc; the site describes fixed-supply tokens launched into a locked liquidity pool with no owner. Its factory and vault contracts are deployed on Arc mainnet. https://lift.fun/ — https://builder.registrai.cc/ecosystem/lift/
- **Load** (Launchpads, Deployed): Meme-coin launchpad on Arc. Tokens launch either as an instant Uniswap V3 USDC pool or on a bonding curve that graduates into a locked Uniswap V3 pool. https://load.fun — https://builder.registrai.cc/ecosystem/load/
- **Lunya** (DEXs, Live on mainnet): DEX and token launchpad on Arc. The AMM offers concentrated, constant-product and stable pools under one router; launches sell against USDC on a bonding curve and graduate into a Lunya pool with locked liquidity. https://lunya.io — https://builder.registrai.cc/ecosystem/lunya/
- **Maple** (Lending, Announced): Onchain asset manager offering digital asset lending and yield products. Named as a borrow/lend participant in Circle's 2025-10-28 Arc testnet announcement and as an RWA issuer in the 2026-09-16 mainnet announcement. https://maple.finance — https://builder.registrai.cc/ecosystem/maple/
- **Mastercard** (Payments, Announced): Card payments network. Circle's 2026-08-05 announcement lists Mastercard among Arc's founding validator cohort; the 2025-10-28 testnet announcement quotes it as an early design partner exploring Arc. https://www.mastercard.com — https://builder.registrai.cc/ecosystem/mastercard/
- **Matrixdock** (Tokenization and RWA, Live on mainnet): RWA technology arm of BIT Group. Launched XAUm, a token representing one troy ounce of physical gold, on Arc on 2026-09-23, with an XAUm/USDC pool on Uniswap and same-day USDC redemption for eligible flows. https://www.matrixdock.com/ — https://builder.registrai.cc/ecosystem/matrixdock/
- **Mercoin** (Payments, Announced): Japanese crypto-asset company in the Mercari group that runs the crypto trading service inside the Mercari app. Named in Circle's 2025-10-28 Arc testnet announcement among payment and fintech firms engaging with Arc. https://about.mercoin.com/ — https://builder.registrai.cc/ecosystem/mercoin/
- **Mercurifi** (Launchpads, Live on mainnet): Token launchpad and trading app on Arc mainnet. Launches sell on a USDC-priced bonding curve and graduate into a Uniswap v4 pool held by a locker; the trading app swaps graduated tokens and listed Arc assets against USDC. https://mercuri.finance/ — https://builder.registrai.cc/ecosystem/mercurifi/
- **MetaMask** (Wallets, Live on mainnet): Self-custody crypto wallet with swap features. Circle's mainnet launch release names it among the wallets supporting Arc. https://metamask.io/ — https://builder.registrai.cc/ecosystem/metamask/
- **Meter** (Payments, Live on mainnet): Pay-per-call API gateway: a caller pays a registered endpoint in USDC through the MeterRegistry contract and sends the transaction hash as proof. Contract on Arc mainnet since 2026-10-26; built with Arc Studio. https://getmeter.vercel.app — https://builder.registrai.cc/ecosystem/meter/
- **MEXC** (Exchanges, Live on mainnet): Crypto exchange. Listed among digital asset exchanges giving users access to Arc in Circle's 2026-09-16 mainnet launch announcement. https://www.mexc.com — https://builder.registrai.cc/ecosystem/mexc/
- **MoneyGram** (Payments, Announced): International money transfer company. Named in Circle's 2026-08-05 announcement as part of Arc's founding validator cohort, and as a global payments firm in the 2026-09-16 mainnet announcement. https://www.moneygram.com — https://builder.registrai.cc/ecosystem/moneygram/
- **MoonPay** (On/off-ramps, Live on mainnet): Payments company with a crypto on-ramp. Users can buy USDC by card, Apple Pay, Google Pay or bank transfer and receive it on Arc, per a 2026-10-10 news report of the Arc announcement. https://moonpay.com/ — https://builder.registrai.cc/ecosystem/moonpay/
- **Morpho** (Lending, Live on mainnet): Onchain lending network. On Arc it runs Morpho Blue markets for variable-rate lending and borrowing, and its Earn Kit API is used by apps such as Pulsar Money and SafePal for yield products. https://morpho.org — https://builder.registrai.cc/ecosystem/morpho/
- **MurMur** (Games and NFTs, Live on mainnet): Population simulation of neural agents with an agent economy, land claims, governance and a breeding market. The site states it settles on Arc mainnet and links its MURMUR token contract on the Arc explorer. https://muros.live/ — https://builder.registrai.cc/ecosystem/murmur/
- **MySphere** (Launchpads, Live on mainnet): Social app on Base whose Startpad token launchpad also runs on Arc mainnet, with bonding curves counted in USDC. Its how-it-works page names Arc mainnet for Startpad and its app config lists four Arc mainnet (chain ID 5042) contracts. https://mysphere.fun — https://builder.registrai.cc/ecosystem/mysphere/
- **New York Life Investment Management** (Asset managers, Announced): Global investment manager. Named in Circle's 2026-09-16 mainnet announcement, in partnership with Centrifuge, among asset managers and RWA issuers working to bring tokenized financial products onchain. https://www.nylim.com/ — https://builder.registrai.cc/ecosystem/new-york-life-investment-management/
- **Noah** (Payments, Announced): Stablecoin payments platform offering payment rails in local fiat currencies, bitcoin and stablecoins through a business API and hosted checkout. Named in Circle's Arc testnet (2025-10-28) and mainnet (2026-09-16) announcements. https://noah.com/ — https://builder.registrai.cc/ecosystem/noah/
- **node101** (Infrastructure, Announced): Blockchain infrastructure company offering RPC plans, dedicated nodes, staking and white-label validation, with an Arc RPC product page. The Circle Alliance Directory lists it with Arc support; its Arc page describes Arc Testnet. https://node101.io — https://builder.registrai.cc/ecosystem/node101/
- **Nonco** (Market makers, Announced): Provider of stablecoin and crypto liquidity solutions for institutional and enterprise clients. Named in Circle's 2026-08-05 announcement among DeFi protocols and capital allocators for Arc. https://www.nonco.com/ — https://builder.registrai.cc/ecosystem/nonco/
- **NOXA Fun** (Launchpads, Deployed): Token launchpad with single-sided Uniswap V3 liquidity and graduation mechanics, deployed on several chains including Arc. Creators earn fees from trading. https://fun.noxa.eth.limo/ — https://builder.registrai.cc/ecosystem/noxa-fun/
- **Nuvei** (Payments, Announced): Payments company offering pay-ins, payouts and data on one platform. Named in Circle's 2025-10-28 Arc testnet announcement; its CEO is quoted as evaluating Arc for faster merchant funding and multi-currency payouts. https://www.nuvei.com/ — https://builder.registrai.cc/ecosystem/nuvei/
- **o1.exchange** (Trading, Live on mainnet): Onchain trading platform with a terminal, swap, staking and a token launchpad across several chains. Its docs list launchpad contracts on Arc mainnet, with USDC and cirBTC as paired assets. https://o1.exchange/ — https://builder.registrai.cc/ecosystem/o1-exchange/
- **OKX** (Exchanges, Live on mainnet): Crypto exchange. It opened USDC deposits and withdrawals on the Arc chain at 04:00 UTC on 2026-09-16, per its help-centre notice. https://www.okx.com — https://builder.registrai.cc/ecosystem/okx/
- **OKX Wallet** (Wallets, Live on mainnet): OKX's web3 wallet and DEX aggregation product. OKX's OnchainOS docs list a DEX router and a token-approval contract for Arc. https://web3.okx.com — https://builder.registrai.cc/ecosystem/okx-wallet/
- **OpenSea** (Games and NFTs, Live on mainnet): NFT marketplace. Its support page lists Arc among the compatible blockchains, and the Seaport contract is deployed on Arc. https://opensea.io — https://builder.registrai.cc/ecosystem/opensea/
- **Ornn** (Trading, Announced): Financial products for the compute market, including an H100 index price and capacity purchases. Named among agentic-economy builders in Circle's 2026-09-16 Arc mainnet announcement. https://ornn.com — https://builder.registrai.cc/ecosystem/ornn/
- **Orthogonal** (AI agents, Announced): Gives AI agents access to web search, scraping and enrichment APIs through one account, via API, MCP server or CLI, with pay-per-call pricing including x402. Named among agentic-economy builders in Circle's 2026-09-16 Arc mainnet announcement. https://orthogonal.com — https://builder.registrai.cc/ecosystem/orthogonal/
- **OSL** (Exchanges, Live on mainnet): Digital asset trading platform under OSL Group. Announced as adding USDC deposits and withdrawals on Arc on 2026-09-17, one of six supported USDC networks, per a news report. https://osl.com — https://builder.registrai.cc/ecosystem/osl/
- **OwlPay** (Payments, Announced): Payment platform from OwlTing for fiat payouts and stablecoin cross-border payments, plus stablecoin and card acceptance. Listed on Arc's ecosystem directory as a fintech. https://www.owlting.com/owlpay/ — https://builder.registrai.cc/ecosystem/owlpay/
- **Pairpoint by Vodafone** (Payments, Announced): Vodafone and Sumitomo Corporation's Economy of Things business, which has a payments service with Mastercard for machine-to-machine payments in fleet and logistics. Named among payments and technology firms in Circle's 2025-10-28 Arc testnet announcement. — https://builder.registrai.cc/ecosystem/pairpoint-by-vodafone/
- **PancakeSwap** (DEXs, Live on mainnet): DEX whose Infinity version (hook-based concentrated liquidity pools, singleton vault) is deployed on Arc. Its developer docs list the Arc Vault, CLPoolManager and router addresses. https://pancakeswap.finance — https://builder.registrai.cc/ecosystem/pancakeswap/
- **Pante** (Consumer apps, Live on mainnet): PANTE, a token on Arc mainnet with a 1 billion supply, and a site that links to its Synthra launchpad, swap and pool pages. Token contract on Arc mainnet since 2026-09-25; the site was built with Arc Studio. https://pante.vercel.app — https://builder.registrai.cc/ecosystem/pante/
- **Parabolarc** (Launchpads, Deployed): Launchpad that launches each token into a locked Uniswap v4 pool; on Arc the pool is paired with USDC. https://www.parabolarc.xyz — https://builder.registrai.cc/ecosystem/parabolarc/
- **Paysafe** (Payments, Announced): Payments company serving businesses and consumers, with brands such as Skrill, Neteller and Paysafecard. Named among payments firms in Circle's 2025-10-28 Arc testnet announcement. https://www.paysafe.com — https://builder.registrai.cc/ecosystem/paysafe/
- **Peach** (DEXs, Live on mainnet): Swap aggregator and token launchpad on Arc, with Trade (0.5% fee shown), Terminal, Launchpad and Bridge sections. The Bridge, added 8 Oct 2026, moves native USDC to Arc with Circle's CCTP and the Arc App Kit. Its contracts were deployed on Arc mainnet on 7 Sep 2026. https://peach.ag/ — https://builder.registrai.cc/ecosystem/peach/
- **Peddles** (Launchpads, Deployed): Launchpad where tokens launch into locked Uniswap v4 pools, on several chains including Arc. Also runs PeddleQuest, a quest platform with on-chain escrowed reward pools, deployed on Arc on 2026-10-02. https://peddles.xyz — https://builder.registrai.cc/ecosystem/peddles/
- **Phantom** (Wallets, Live on mainnet): Self-custodial wallet for trading across several chains. Its docs list Arc mainnet (chain ID 5042) among supported EVM networks, and Circle's 2026-09-16 announcement names it among wallets. https://phantom.com — https://builder.registrai.cc/ecosystem/phantom/
- **PhotonPay** (Payments, Announced): Business payments platform covering stablecoin and fiat acceptance, multi-asset wallets, payouts, FX and corporate cards. Named among payments firms in Circle's 2025-10-28 Arc testnet announcement. https://www.photonpay.com — https://builder.registrai.cc/ecosystem/photonpay/
- **Pimlico** (Developer tools, Live on mainnet): Account abstraction infrastructure providing ERC-4337 bundler and paymaster services. Its docs list Arc Mainnet (chain ID 5042) with EntryPoint v0.6 to v0.9 and EIP-7702 support. https://pimlico.io — https://builder.registrai.cc/ecosystem/pimlico/
- **pools.trade** (Launchpads, Announced): Token launchpad from Uniswap Labs that runs on Uniswap v4 pools, live on Robinhood Chain. Named among onchain trading protocols in Circle's 2026-09-16 Arc mainnet announcement; no Arc deployment found. https://pools.xyz — https://builder.registrai.cc/ecosystem/pools-trade/
- **PredictAgent** (AI agents, Live on mainnet): Price-signal marketplace for AI agents: buyers pay USDC per signal, held in escrow until the seller reveals a prediction committed onchain. Built with Arc Studio for the Arc Microgrants program; first contract on Arc mainnet 2026-10-17, the active one since 2026-10-19. https://predict-agent.vercel.app — https://builder.registrai.cc/ecosystem/predictagent/
- **Privy** (Wallets, Announced): Wallet infrastructure for embedded user wallets, agent wallets, key management and policy controls. Named among digital wallet providers in Circle's 2025-10-28 Arc testnet announcement. https://privy.io — https://builder.registrai.cc/ecosystem/privy/
- **ProShares** (Asset managers, Announced): Issuer of exchange-traded funds, including crypto, leveraged and inverse ETFs. Named among asset managers and RWA issuers working to bring tokenized financial products onchain in Circle's 2026-09-16 announcement. https://www.proshares.com — https://builder.registrai.cc/ecosystem/proshares/
- **Pulsar** (Payments, Live on mainnet): Non-custodial consumer money app covering dollar, euro and pound balances, bank and stablecoin transfers, swaps and card spending. Announced on Arc 2026-09-16; Arc's blog of 2026-10-06 says it is live on mainnet, onboarding from a waitlist. https://pulsar.money/ — https://builder.registrai.cc/ecosystem/pulsar/
- **Pump.fun** (Trading, Announced): Memecoin launch and trading platform. Named among onchain trading and liquidity protocols expanding access on Arc in Circle's 2026-09-16 mainnet announcement. https://pump.fun — https://builder.registrai.cc/ecosystem/pump-fun/
- **Quicknode** (Infrastructure, Live on mainnet): Blockchain infrastructure provider. Its docs list managed Arc mainnet endpoints (chain ID 5042, HTTP and WSS, archive data), and Arc's docs list a Quicknode mainnet RPC. https://www.quicknode.com — https://builder.registrai.cc/ecosystem/quicknode/
- **Rabby** (Wallets, Live on mainnet): Browser and mobile wallet for Ethereum and EVM chains. Arc (chain ID 5042) appears in the chain list served by Rabby's own API. https://rabby.io — https://builder.registrai.cc/ecosystem/rabby/
- **Rain** (Payments, Announced): Stablecoin payments infrastructure for enterprises, including stablecoin-powered cards. Named as a stablecoin payments provider routing payment and settlement flows through Arc in Circle's announcements. https://www.rain.xyz — https://builder.registrai.cc/ecosystem/rain/
- **Rainbow** (Wallets, Live on mainnet): Crypto wallet app. Named among digital wallet providers joining Arc at testnet (2025-10-28) and among wallets listed for Arc mainnet in Circle's 2026-09-16 announcement. https://rainbow.me — https://builder.registrai.cc/ecosystem/rainbow/
- **Ramp** (Payments, Announced): Corporate card, spend management and accounts payable platform. Named among global payments and fintech participants in Circle's 2025-10-28 Arc testnet announcement. https://ramp.com — https://builder.registrai.cc/ecosystem/ramp/
- **Ramp Network** (On/off-ramps, Announced): Crypto on-ramp and off-ramp provider with a self-custodial wallet. Named among infrastructure providers for Arc in Circle's 2025-10-28 testnet announcement. https://rampnetwork.com — https://builder.registrai.cc/ecosystem/ramp-network/
- **Rango** (Bridges and cross-chain, Live on mainnet): Cross-chain DEX and bridge aggregator. Rango's integrations page lists Arc, and its RangoDiamond contract is deployed on Arc. https://rango.exchange — https://builder.registrai.cc/ecosystem/rango/
- **Re7 Labs** (Lending, Deployed): DeFi curator and advisor offering in-house research tooling and DeFi ratings for protocols. DefiLlama lists Arc among the chains for its protocol page. https://re7labs.xyz — https://builder.registrai.cc/ecosystem/re7-labs/
- **Relay** (Bridges and cross-chain, Live on mainnet): Cross-chain payments and bridging protocol. Its chains API lists Arc (chain ID 5042) with deposits enabled, plus an ERC-20 router and approval proxy. https://relay.link — https://builder.registrai.cc/ecosystem/relay/
- **rhino.fi** (Bridges and cross-chain, Live on mainnet): Stablecoin payments and cross-chain bridge provider with Smart Deposit Addresses. Its docs list Arc among supported chains, with USDC (ERC20 and native) sendable to the bridge and USDC (ERC20) received from it. https://rhino.fi — https://builder.registrai.cc/ecosystem/rhino-fi/
- **Robinhood** (Exchanges, Announced): Announced as an exchange supporting Arc: Circle's 2025-10-28 testnet release lists Robinhood among exchanges expanding access to Arc, and a 2026-09-16 news report says Robinhood users can deposit and withdraw USDC on Arc. https://robinhood.com — https://builder.registrai.cc/ecosystem/robinhood/
- **Sasai Fintech** (Payments, Announced): Fintech business of Cassava Technologies. Named among global payments and fintech participants in Circle's 2025-10-28 Arc testnet announcement. — https://builder.registrai.cc/ecosystem/sasai-fintech/
- **SBI Holdings** (Banks, Announced): Japanese financial services group. Named as a founding validator of Arc in Circle's announcements. https://www.sbigroup.co.jp — https://builder.registrai.cc/ecosystem/sbi-holdings/
- **SBI Shinsei Trust** (Stablecoin issuers, Announced): Issuer of JPYSC, a trust-type yen-pegged stablecoin. Cited in a statement from SBI Holdings' chairman in Circle's 2026-09-16 Arc mainnet announcement. — https://builder.registrai.cc/ecosystem/sbi-shinsei-trust/
- **Securitize** (Tokenization and RWA, Announced): Tokenization platform for real-world assets. Circle's announcements name it as the tokenizer of BlackRock's BUIDL fund, which Circle lists among tokenized assets for Arc. https://securitize.io — https://builder.registrai.cc/ecosystem/securitize/
- **Societe Generale** (Banks, Announced): French bank. Named among global banks with access to Arc's private mainnet in Circle's 2026-09-16 announcement, and among financial institutions at testnet in 2025. https://www.societegenerale.com — https://builder.registrai.cc/ecosystem/societe-generale/
- **SoDEX** (Bridges and cross-chain, Deployed): Order-book decentralized exchange on ValueChain, incubated by SoSoValue, with a bridge product. DefiLlama lists Arc among the chains of its SoDEX Bridge protocol page, with TVL on Arc. https://sodex.com — https://builder.registrai.cc/ecosystem/sodex-bridge/
- **SolonPad** (Launchpads, Live on mainnet): Token launchpad on Arc where a share of each coin's trading fee is paid to holders in stock tokens backed 1:1 on Robinhood Chain. Also runs SolonLend, a USDC vault and NVDA.sol-collateral market on Arc's Morpho deployment. https://solonpad.fun/ — https://builder.registrai.cc/ecosystem/solonpad/
- **Splitty** (Payments, Live on mainnet): Batch USDC payments: send USDC or any ERC-20 on Arc to many wallets in one transaction, funded from other chains through Circle Gateway. Its SplittyBatcher contract has been on Arc mainnet since 2026-09-22; built with Arc Studio. https://splitty.live — https://builder.registrai.cc/ecosystem/splitty/
- **Stablecorp** (Stablecoin issuers, Announced): Canadian digital-asset company that issues QCAD, a Canadian dollar stablecoin. Named as the issuer of QCAD among stablecoins joining Arc for testnet in Circle's 28 October 2025 announcement. https://stablecorp.ca/ — https://builder.registrai.cc/ecosystem/stablecorp/
- **Standard Chartered** (Banks, Announced): Global bank serving corporate, institutional and affluent clients across Asia, Africa and the Middle East. Named as an Arc founding validator in Circle's 5 August 2026 announcement and as a bank with access to Arc's private mainnet on 16 September 2026. https://www.sc.com/en/ — https://builder.registrai.cc/ecosystem/standard-chartered/
- **Stargate** (Bridges and cross-chain, Announced): Cross-chain transfer protocol built on LayerZero. Announced as a crosschain partner for Arc on 2025-10-28. https://stargate.finance — https://builder.registrai.cc/ecosystem/stargate/
- **State Street** (Banks, Announced): Global custody bank. Named among capital markets firms engaging with Arc in Circle's October 2025 testnet announcement and as a bank with access to Arc's private mainnet in the 16 September 2026 announcement. https://www.statestreet.com/ — https://builder.registrai.cc/ecosystem/state-street/
- **Steakhouse Financial** (Lending, Live on mainnet): Onchain stablecoin credit and yield provider that curates Morpho vaults. On Arc it deployed Steakhouse Prime USDC and Prime EURC vaults, which allocate into cirBTC-backed USDC and EURC markets on Morpho. https://www.steakhouse.financial/ — https://builder.registrai.cc/ecosystem/steakhouse-financial/
- **Sumitomo Corporation** (Validators, Announced): Japanese integrated trading company. Named as a member of Arc's founding validator cohort in Circle's 5 August 2026 announcement, and listed among payments and fintech ecosystem participants at testnet launch. https://www.sumitomocorp.com/en/jp — https://builder.registrai.cc/ecosystem/sumitomo-corporation/
- **Superform** (Lending, Announced): Financial app for buying US stocks, earning on USD and trading crypto from one account. Named among yield providers for Arc in Circle's 28 October 2025 testnet announcement. https://www.superform.xyz/ — https://builder.registrai.cc/ecosystem/superform/
- **SushiSwap** (DEXs, Live on mainnet): Decentralized exchange with concentrated-liquidity AMMs and a swap aggregator on many chains. On Arc, its V3 and V4 contracts are deployed and listed by DefiLlama with liquidity. https://sushi.com/ — https://builder.registrai.cc/ecosystem/sushiswap/
- **Symbiosis** (Bridges and cross-chain, Live on mainnet): Cross-chain swap and liquidity protocol connecting EVM and non-EVM networks. Its API lists Arc (chain id 5042) among supported chains, and DefiLlama shows Symbiosis liquidity on Arc. https://symbiosis.finance/ — https://builder.registrai.cc/ecosystem/symbiosis/
- **Syn DAO** (Payments, Live on mainnet): USDC treasury, governance and milestone-escrow platform on Arc for organizations, creators and AI agents. Its README lists treasury, governor, sARC token and escrow contracts on Arc mainnet (chain ID 5042); DefiLlama lists it on Arc. https://www.syndaopro.xyz — https://builder.registrai.cc/ecosystem/syn-dao/
- **Synthra** (DEXs, Live on mainnet): Trading interface offering swaps across supported chains, Hyperliquid perpetuals and concentrated liquidity. Its site metadata describes it as a DEX on Arc, and DefiLlama lists it in the DEX category. https://app.synthra.org/ — https://builder.registrai.cc/ecosystem/synthra/
- **Taurus** (Custody, Announced): Swiss digital-asset infrastructure provider offering custody, tokenization, trading and collateral management for banks. Named among custodians for Arc in Circle's 28 October 2025 testnet announcement. https://www.taurushq.com/ — https://builder.registrai.cc/ecosystem/taurus/
- **Tazapay** (Payments, Announced): Singapore-based B2B cross-border payments company that Circle agreed to acquire on 2026-09-08. Named among payments firms that will enable stablecoin settlement on Arc in Arc's 2026-09-16 mainnet post. https://tazapay.com — https://builder.registrai.cc/ecosystem/tazapay/
- **Team Finance** (Developer tools, Live on mainnet): Token tooling platform for creating tokens and for locking liquidity, team tokens and NFTs, with vesting, staking pools, airdrops and multisender. Its Arc page lists these services on Arc mainnet, including Uniswap V3 liquidity locks. https://www.team.finance — https://builder.registrai.cc/ecosystem/team-finance/
- **Tenderly** (Infrastructure, Live on mainnet): Developer platform for simulating, debugging and monitoring smart contracts. Its Node RPC docs list Arc (chain 5042) with a gateway endpoint at arc.gateway.tenderly.co, and it was named an Arc infrastructure partner on 2025-10-28. https://tenderly.co — https://builder.registrai.cc/ecosystem/tenderly/
- **Thirdweb** (Developer tools, Live on mainnet): Web3 developer platform for wallets, payments, bridging and tokens. It publishes a chain page for Arc (chain ID 5042) with a public RPC at 5042.rpc.thirdweb.com and links to the Arc explorer. https://thirdweb.com — https://builder.registrai.cc/ecosystem/thirdweb/
- **Thunes** (Payments, Announced): Named as a stablecoin payments provider in Circle's 2026-08-05 announcement and among global payments firms in the 2026-09-16 mainnet announcement. Provides B2B cross-border payments to 140 countries, in fiat and stablecoins. https://www.thunes.com — https://builder.registrai.cc/ecosystem/thunes/
- **Tolly** (Launchpads, Live on mainnet): Token launchpad and DEX. A token launches in one transaction, its supply becomes locked liquidity, and every trade pays a 1% fee split between the creator, holder rewards, the protocol and token burns. https://tollylabs.com/ — https://builder.registrai.cc/ecosystem/tolly/
- **Topaz DEX** (DEXs, Live on mainnet): Omnichain ve(3,3) decentralized exchange with a BNB Chain hub and spokes on Ethereum, Base, Robinhood Chain and Arc. Its Arc deployment includes pools, routers, concentrated liquidity, voting and the Topaz Auto vault factory. https://www.topazdex.com — https://builder.registrai.cc/ecosystem/topaz-cl/
- **Transak** (On/off-ramps, Announced): Listed under infrastructure in Circle's 2025-10-28 Arc public testnet announcement. Provides a crypto on- and off-ramp that applications embed to let users buy and sell crypto, handling KYC and fiat payment methods. https://transak.com — https://builder.registrai.cc/ecosystem/transak/
- **TRM** (Infrastructure, Announced): Listed under infrastructure in Circle's 2025-10-28 Arc public testnet announcement. TRM Labs provides blockchain intelligence and investigation software for tracing illicit activity. https://www.trmlabs.com — https://builder.registrai.cc/ecosystem/trm/
- **Trust Wallet** (Wallets, Live on mainnet): Named among digital wallets in Circle's 2026-09-16 Arc mainnet announcement. Self-custody multi-chain wallet app for crypto, NFTs and DeFi. https://trustwallet.com — https://builder.registrai.cc/ecosystem/trust-wallet/
- **Turnkey** (Wallets, Live on mainnet): Wallet and key-management infrastructure with enclave-based key storage and transaction policies. Its docs list Arc Mainnet (5042) and Arc Testnet (5042002) as supported networks. https://www.turnkey.com — https://builder.registrai.cc/ecosystem/turnkey/
- **UBI.fun** (Launchpads, Live on mainnet): Memecoin launchpad on Arc. Its site says coins launch in one click and that a share of trading fees is paid to holders in USDC daily. https://ubi.fun/ — https://builder.registrai.cc/ecosystem/ubi-fun/
- **Uniswap** (DEXs, Live on mainnet): Decentralized exchange protocol and app. Uniswap v2, v3, v4 and UniswapX went live on Arc on 2026-09-16, with support in the Uniswap web app, wallet and API. https://app.uniswap.org/ — https://builder.registrai.cc/ecosystem/uniswap/
- **UnitFlow Finance** (DEXs, Live on mainnet): Self-custodial exchange on Arc with V3 liquidity, farms, points, a Genesis Pass NFT and no-code token creation, according to its docs. https://unitflow.finance/ — https://builder.registrai.cc/ecosystem/unitflow-finance/
- **Upbit** (Exchanges, Live on mainnet): Named among major exchanges and wallet providers in Circle's 2026-08-05 announcement and among digital asset exchanges in the 2026-09-16 mainnet announcement. Digital asset exchange serving the Korean market. https://www.upbit.com — https://builder.registrai.cc/ecosystem/upbit/
- **UQPay** (Payments, Live on mainnet): Payments platform offering global acquiring, multi-currency accounts, card issuance and stablecoin services. Its news page lists a 2026-09-16 item announcing support for Arc. https://www.uqpay.com — https://builder.registrai.cc/ecosystem/uqpay/
- **vfat.io** (Asset managers, Deployed): Yield aggregator built on Sickle, a per-user smart contract wallet that batches steps such as swapping, adding liquidity and staking into single transactions while the user keeps custody. DefiLlama lists it on Arc. https://vfat.io/yield — https://builder.registrai.cc/ecosystem/vfat-io/
- **Virtuals** (AI agents, Announced): Listed among builders of the agentic economy in Circle's 2026-09-16 Arc mainnet announcement. Platform for AI agents that operate as economic entities with identity, capital, markets and governance. https://www.virtuals.io — https://builder.registrai.cc/ecosystem/virtuals/
- **Visa** (Payments, Announced): Global payments network. Named in Circle's announcements as a member of Arc's founding validator cohort (2026-08-05) and among global payments firms (2026-09-16). https://www.visa.com — https://builder.registrai.cc/ecosystem/visa/
- **Vultisig** (Wallets, Announced): Listed among digital wallets in Circle's 2025-10-28 Arc public testnet announcement. Open-source multi-party computation wallet that uses multi-device signing instead of a seed phrase. https://vultisig.com — https://builder.registrai.cc/ecosystem/vultisig/
- **WalletConnect Pay** (Payments, Live on mainnet): WalletConnect's crypto payment product for merchants and PSPs. WalletConnect's Arc launch post (2026-09-16) says consumers can pay with WalletConnect Pay on Arc in USDC. Its docs' chain list (General Availability) does not list Arc yet. https://walletconnect.com/payments — https://builder.registrai.cc/ecosystem/walletconnect-pay/
- **Wenia** (Exchanges, Live on mainnet): Crypto platform operated by Wenia Ltd, licensed in Bermuda, where users buy, convert, send and sell crypto through its app. Named as a digital asset exchange in Circle's 2026-09-16 Arc mainnet announcement. https://www.wenia.com — https://builder.registrai.cc/ecosystem/wenia/
- **Wintermute** (Market makers, Announced): Algorithmic trading firm offering OTC, DeFi liquidity and API liquidity. Named among market makers and OTCs in Circle's 2025-10-28 Arc public testnet announcement. https://www.wintermute.com — https://builder.registrai.cc/ecosystem/wintermute/
- **Wirex** (Payments, Live on mainnet): Crypto wallet and payment platform with cards, exchange and global transfers, plus a business offering for stablecoin accounts and cards. Named as a stablecoin payments provider in Circle's 2026-08-05 Arc announcement. https://wirexapp.com — https://builder.registrai.cc/ecosystem/wirex/
- **WisdomTree** (Asset managers, Announced): Exchange-traded fund and product sponsor and asset manager. Circle's 2025-10-28 Arc testnet announcement names its tokenized funds WTGXX and CRDT as yield-bearing tokenized investment funds. https://www.wisdomtree.com — https://builder.registrai.cc/ecosystem/wisdomtree/
- **WizPay** (Payments, Live on mainnet): Non-custodial stablecoin payments app on Arc for sends, payroll, invoices and payment links, USDC/EURC swaps and CCTP V2 bridging. Its site lists payroll and swap contracts on Arc mainnet (chain ID 5042). https://wizpay.xyz — https://builder.registrai.cc/ecosystem/wizpay/
- **Wonk Fun** (Launchpads, Deployed): Token launchpad on Arc. Each launch is a Uniswap V4 pool behind the Wonk hook contract; graduated positions are held in a locker contract. Listed on DefiLlama as a launchpad. — https://builder.registrai.cc/ecosystem/wonk-fun/
- **Wormhole** (Bridges and cross-chain, Announced): Open-source cross-chain messaging and token-transfer infrastructure. Named among crosschain providers in Circle's 2025-10-28 Arc testnet announcement; Arc is registered as chain id 71 in the Wormhole TypeScript SDK. https://wormhole.com — https://builder.registrai.cc/ecosystem/wormhole/
- **xStocks** (Tokenization and RWA, Announced): Tokenized US equities and ETFs backed 1:1, offered by Payward. Named among asset managers and RWA issuers in Circle's 2026-09-16 Arc mainnet announcement. https://xstocks.fi — https://builder.registrai.cc/ecosystem/xstocks/
- **Yellow Card** (Payments, Announced): Licensed stablecoin payments infrastructure provider covering USD and local currencies in emerging markets. Named among global payments firms in Circle's 2025-10-28 Arc testnet announcement. https://yellowcard.io — https://builder.registrai.cc/ecosystem/yellow-card/
- **ZeroDev** (Developer tools, Live on mainnet): Smart account infrastructure covering account abstraction, gas sponsorship, session keys and embedded wallets. Its docs list Arc Mainnet (5042) among supported networks, and its Kernel contracts are deployed on Arc. https://zerodev.app — https://builder.registrai.cc/ecosystem/zerodev/
- **Zodia Custody** (Custody, Announced): Institutional digital asset custodian. Named as a custody provider in Circle's Arc public testnet (2025-10-28) and mainnet (2026-09-16) announcements. https://www.zodia-custody.com — https://builder.registrai.cc/ecosystem/zodia-custody/
- **Zodia Markets** (Market makers, Announced): Institutional digital-asset brokerage offering fiat and crypto pairs. Named among market makers and OTCs in Circle's 2025-10-28 Arc public testnet announcement. https://zodiamarkets.com — https://builder.registrai.cc/ecosystem/zodia-markets/