How to Send USDC from Coinbase Wallet to Base?

Connecting Your Coinbase Wallet to Across

1. Open the Across interface at app.across.to/bridge using Chrome, Brave, or Firefox on desktop.

2. Click “Connect Wallet” in the top-right corner and select “Coinbase Wallet” from the list of options.

3. Approve the connection request inside your Coinbase Wallet mobile or browser extension interface.

4. Confirm that your wallet address appears correctly in the Across UI and that the network displayed matches Ethereum Mainnet.

5. Ensure your Coinbase Wallet holds sufficient ETH for gas fees on Ethereum before proceeding further.

Selecting Chains and Inputting Transfer Details

1. In the Across interface, set “From” to Ethereum Mainnet and “To” to Base.

2. Choose USDC as the token to bridge; Across will automatically detect the USDC balance available in your Coinbase Wallet on Ethereum.

3. Enter the exact amount of USDC you wish to transfer—Across supports transfers up to $10,000,000.

4. Observe the estimated time-to-completion and fee breakdown shown dynamically based on current network conditions.

5. Verify that the destination address preview matches your Coinbase Wallet address on Base, not a different chain.

Transaction Confirmation and Finalization

1. Click “Bridge Now” to initiate the transaction on Ethereum Mainnet.

2. Sign the approval and bridge transactions sequentially within Coinbase Wallet—Across uses CCTP V2 for automatic finalization, so no second claim step is required.

3. Wait for the Ethereum transaction to be confirmed; this usually takes under two minutes during normal congestion.

4. Monitor the Across status bar: it will switch from “Pending” to “Completed” once USDC appears in your Coinbase Wallet on Base.

5. Refresh your Coinbase Wallet app or browser extension while connected to Base to see the newly received USDC balance.

Verification on Base Chain

1. Switch your Coinbase Wallet network to Base via the network selector dropdown.

2. Navigate to the “Assets” tab and confirm USDC is listed with the correct balance.

3. Cross-check the transaction hash on basescan.org using the receipt link provided by Across.

4. Ensure the USDC token contract address matches the official Circle-deployed USDC on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.

5. Test a small internal transfer within Base—send 1 USDC to another address you control—to validate full token functionality.

Frequently Asked Questions

Q: Why does Across show “CCTP V2” instead of “Relay” for my USDC transfer?Across selects CCTP V2 automatically for transfers above $10,000 because it leverages native Circle infrastructure for deterministic settlement without relying on third-party relayers.

Q: Can I bridge USDC from Coinbase Wallet to Base if my wallet only holds USDC and no ETH?No. You must hold ETH on Ethereum Mainnet to pay for the initial bridge transaction gas fee—even though the bridged asset is USDC.

Q: Is the USDC I receive on Base the same as the one issued by Circle?Yes. Across bridges only canonical USDC through CCTP V2, meaning the token on Base is fully backed, audited, and directly issued by Circle—not a wrapped or synthetic representation.

Q: What happens if I close the Across tab before seeing “Completed”?The transfer remains active on-chain. You can revisit app.across.to/bridge, reconnect your wallet, and check the “Recent Activity” section to monitor progress or retrieve the Base receipt.