# Mastercard

Announced · [Payments](https://builder.registrai.cc/ecosystem/payments/) · also [Validators](https://builder.registrai.cc/ecosystem/validators/) · Last reviewed 2026-10-20

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.

[Website](https://www.mastercard.com)

## Status

- First announced 2025-10-28

Evidence: [Circle: founding validator cohort announcement](https://www.arc.io/pressroom/circle-announces-founding-validator-cohort-and-major-integrations-for-arc-ahead-of-september-16-mainnet-launch)

## Sources

1. [Circle: Arc public testnet announcement](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) (2026-10-20)
2. [Circle: founding validator cohort announcement](https://www.arc.io/pressroom/circle-announces-founding-validator-cohort-and-major-integrations-for-arc-ahead-of-september-16-mainnet-launch) (2026-10-20)
3. [Circle: Arc mainnet launch announcement](https://www.arc.io/pressroom/circle-launches-arc-mainnet-an-economic-operating-system-for-the-internet) (2026-10-20)

[Suggest a correction](https://builder.registrai.cc/ecosystem/mastercard/correct/) · [How we publish](https://builder.registrai.cc/how-we-publish/) · [Arc ecosystem](https://builder.registrai.cc/ecosystem/)

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