Circle Gateway adds ERC-1271 support, letting smart contracts access USDC without workarounds

Circle just removed one of the more annoying friction points in the USDC ecosystem. Circle Gateway now natively supports ERC-1271, the Ethereum standard that lets smart contracts validate signatures, meaning smart contract wallets can directly sign and manage USDC balances without needing a delegate account as an intermediary. What changed and why it matters Circle Gateway is the company’s cross-chain infrastructure layer, designed to give users a unified, non-custodial USDC balance accessible across multiple blockchains in under 500 milliseconds. The problem was that Gateway’s “burn intents,” the mechanism for moving USDC out, required signatures from externally owned accounts (EOAs). Smart contract wallets couldn’t produce those signatures natively, requiring a delegate-account system — essentially a middleman EOA that would sign on behalf of the smart contract. ERC-1271, formally known as EIP-1271, solves this by establishing a standard way for smart contracts to verify signatures. Over 50 protocols already use it, including Uniswap. Circle’s adoption means Gateway now speaks the same language as the broader smart contract ecosystem. The rollout has been systematic, going live a...