Accept USDC on Optimism

Take USDC payments settled on Optimism, wallet-to-wallet, with $0 platform fee and no KYC to start.

Optimism is an Ethereum layer-2 with low gas and fast finality, common among buyers already active in the OP ecosystem.

Create an invoice with Optimism as the settlement chain, send the buyer to the hosted checkout, and get a signed webhook the moment the USDC payment confirms. Shieldz is non-custodial: it only ever holds a public key, funds go straight to your wallet.

curl https://shieldz.cash/api/v1/invoices \
  -H "Authorization: Bearer sk_live_…" \
  -d '{ "amount_usd_cents": 5000, "settlement": { "chain": "OPTIMISM", "asset": "USDC" } }'

See all payments on Optimism, USDC on other chains, the API docs, and the SDKs.

Start free, $0 platform fees, no KYC to start.

Explore Shieldz

Crypto payment gateway: overview, non-custodial, Zcash.

Accept a coin: Bitcoin, USDC, USDT, Zcash.

Compare: vs Coinbase Commerce, vs BTCPay Server, vs ZGo, vs CryptAPI, vs NOWPayments, vs Cryptomus, vs BitPay, vs CoinGate, vs OpenNode, vs Plisio, vs BlockBee, vs CoinPayments.

Use cases: For freelancers, For creators, For open-source projects, For online stores, For SaaS, For VPN & hosting providers, For agencies, For nonprofits, For digital sellers.

Guides: Node.js, FastAPI, .NET, WooCommerce.

Build: SDKs, API reference, quickstart. Learn: overview, blog, how it works, supported coins, pricing, is it safe, verify it yourself.