The paywall your agent can pay.

import { wrapFetchWithPayment } from '@x402/fetch';
import { privateKeyToAccount } from 'viem/accounts';

// One agent wallet, one line of wrapper. Done.
const account = privateKeyToAccount(process.env.AGENT_PRIVATE_KEY);
const fetchWithPayment = wrapFetchWithPayment(fetch, account);

// Hit any Pico content URL — payment happens automatically on 402.
const res = await fetchWithPayment('https://picomicropay.nl/api/content/abc-123');
const { contentUrl, title } = await res.json();

# A bare curl shows you the 402 challenge — no signing required to peek.
$ curl -i https://picomicropay.nl/api/content/abc-123

HTTP/1.1 402 Payment Required
payment-required: <base64 JSON, decoded below>

{
  "x402Version": 2,
  "accepts": [
    { "scheme": "exact", "network": "eip155:8453", "amount": "200000",
      "asset": "0x8335…2913", "payTo": "0xCreator…" },
    { "scheme": "exact", "network": "eip155:5042", "amount": "200000",
      "asset": "0x3600…0000", "payTo": "0xCreator…" }
  ]
}
# Base and Arc, same price, same creator wallet — your client picks one.

import { wrapFetchWithPayment, x402Client } from '@x402/fetch';
import { registerExactEvmScheme } from '@x402/evm/exact/client';
import { privateKeyToAccount } from 'viem/accounts';

// Same paywall, settled on Arc mainnet (eip155:5042) by Circle's
// x402 Facilitator. USDC goes straight to the creator's wallet.
const signer = privateKeyToAccount(process.env.AGENT_PRIVATE_KEY);
const client = registerExactEvmScheme(new x402Client(), {
  signer,
  networks: ['eip155:5042'],
});
const fetchWithPayment = wrapFetchWithPayment(fetch, client);

const res = await fetchWithPayment(
  'https://picomicropay.nl/api/content/abc-123?network=arc',
);