x402 demo

HTTP 402 Payment Required — pay-per-request API on Base Sepolia

GET/api/cowsays

Price0.001 USDCNetworkBase Sepolia · eip155:84532Asset0x036CbD53842c5426634e7929541eC2318f3dCF7eSchemeexact · EIP-3009 TransferWithAuthorizationReturnscowsay ASCII art

Try without payment:

$ curl -i https://x402.llmer.com/api/cowsays
# → HTTP 402  PAYMENT-REQUIRED: <base64>

Try it in browser

Connect MetaMask on Base Sepolia to pay and get a cowsay

Live requests

Resets on page refresh

connecting…

Waiting for requests to /api/cowsays…

Base Sepolia · Chain ID 84532 · USDC 0x036C…CF7e · GitHub