Bridge USDC from Base → Arc on the new official domain: This is the supported USDC on-ramp for uarc. Prefer this URL going forward. Legacy hosts remain live without a hard redirect so wallet risk scores don’t chain — but announce and bookmark How it works (non-custodial): Connect on Base and deposit USDC into Circle’s GatewayWallet Wait for Circle finality (about 13–19 minutes — ETH L1 blocks, not Base L2 blocks) Your wallet asks for one Circle EIP-712 burn authorization — that signature is the claim (there is no separate Claim button) Our relayer submits gatewayMint on Arc and pays the gas uarc never holds your key or your USDC. Funds move only through Circle’s public Gateway contracts. Platform fee is 0; only Circle’s own transfer fee applies. Official contracts — verify before you sign: GatewayWallet (Base deposit) 0x77777777Dcc4d5A8B6E418Fd04D8997ef11000eE GatewayMinter (Arc mint) 0x2222222d7164433c4C09B0b0D809a9b52C04C205 Canonical Arc USDC 0x3600000000000000000000000000000000000000 Relayer (sponsors Arc mint gas only) 0x25948666b5cA24D1745b9053929d70588E1C3E21 If you refresh mid-bridge, restore with your Base deposit tx: Circle Gateway docs: Home: