Shieldz
Swap USDC Optimism to Base
Swap USDC on Optimism to USDC on Base straight from your own wallet: no exchange account, no wrapped tokens, and no one holding your funds in between. Shieldz routes this pair through Relay and shows you the full quote before you sign.
What 1,000 USDC on Optimism gets you
Quoted October 19, 2026. Updates live while this page is open.
How to swap USDC Optimism to Base
- Open Shieldz Swap and choose USDC on Optimism as the coin you pay and USDC on Base as the coin you get.
- Enter an amount. Relay quotes it, with the amount you receive and the time it takes.
- Paste the Base address you want to receive at, or connect a Base wallet and pick one.
- Review the minimum you receive and the fees, then send from Ledger, Trezor, Keystone and MetaMask. Shieldz tracks the swap until it lands.
What it costs
On this quote, $1,000 of USDC on Optimism became $998 of USDC on Base: about $1.62, or 0.16%, for everything taken out on the way. That includes the 0.15% Shieldz fee, the protocol's own fees and the gas to deliver to you. The network fee your wallet pays to send is extra.
MetaMask's built-in swap charges 0.875% and Phantom's 0.85% before any of that. Compare on your own amount.
Gas on OP Mainnet is paid in ETH. If you're arriving with a stablecoin, swap a little into ETH on OP Mainnet first so you can move funds later.
Pay USDC on Optimism with
Receive at any Base address you control. More on Optimism and Base.
USDC Optimism to Base: common questions
How do I swap USDC Optimism to Base?
Open Shieldz Swap with USDC on Optimism as the coin you pay and USDC on Base as the coin you get, enter an amount and paste the Base address you want to receive at. Then send from Ledger, Trezor, Keystone, MetaMask and Phantom or another supported wallet. The protocol delivers USDC on Base straight to your address.
How long does a USDC Optimism to Base swap take?
The fastest route quoted today takes a few seconds. Every quote shows its expected time before you send.
How much does it cost?
On the $1,000 quote above, about $1.62 (0.16%) in total: the 0.15% Shieldz fee, the protocol's own fees and the gas to deliver to you, all already taken out of the amount shown. The network fee your wallet pays to send comes on top.
Is it safe? Do I need an account?
There is no account and no KYC. Shieldz never holds your funds or keys: you send USDC on Optimism from your own wallet to a deposit address or contract of the protocol, and the protocol pays USDC on Base to your address. If a swap cannot complete, it is refunded to the address you paid from.
