Testnet only. Arc is currently available on testnet for testing purposes. Mainnet support will be added when the network launches.
Layer 1 (Testnet)
USDC & EURC on Arc
Arc is Circle's own Layer 1 blockchain, purpose-built for stablecoins. It uses USDC as its native gas token, so you don't need ETH or any other token to pay for transactions. Currently available on testnet, with mainnet expected in 2026.
5042002
Chain ID
26
CCTP Domain
2
Stablecoins
Layer
Network Type
Why accept payments on Arc?
USDC is the native gas token (no ETH needed)
Built by Circle, the issuer of USDC and EURC
Supports both USDC and EURC
Ideal for testing Fivo payments without real funds
Supported Tokens
USDC
US Dollar stablecoin
EURC
Euro stablecoin
Gas Fees & Speed
Gas Fees
Gas is paid in USDC (native token). Transaction fees are minimal on testnet.
Settlement Speed
Transactions confirm in seconds. Testnet performance may vary.
Cross-Chain Payments (CCTP)
CCTP Domain 26. Supports cross-chain USDC transfers. Customers can pay from Arc and funds are bridged to the merchant's chain automatically via CCTP.
CCTP cross-chain transfers are supported for USDC only. EURC payments are same-chain only. Learn more in the CCTP documentation.
Other Supported Chains
Start accepting payments on Arc
Create your merchant account and choose Arc as your receiving chain.