Swap Tokens

Swap between any two tokens on Base via the Coinbase swap service using Base MCP

What you can ask

Swap 100 USDC for ETH on Base

Buy $50 of ETH with USDC

Trade 0.01 ETH for USDC

Convert all my USDC to ETH

How it works

The swap tool routes through the Coinbase swap service and requires your approval at keys.coinbase.com. Swaps are only supported on mainnet — not on testnets.

Parameter	Required	What it does
fromAsset	Yes	Token to swap from — symbol (USDC) or contract address
toAsset	Yes	Token to swap to — symbol (ETH) or contract address
amount	Yes	Amount of fromAsset to swap (human-readable decimal)
chain	Yes	base — testnets are not supported

Testnet swaps are not supported. If you need to test, use send on base-sepolia instead.

Approval flow

Same as sending — every swap requires approval at keys.coinbase.com. Your assistant will give you a link to review the swap details (input amount, expected output, price impact) before anything is signed.

Related guides

Send tokens

Send tokens directly to another address.

Check balance

Verify balances before swapping.