Pay-Per-Request with x402

npm install @x402/fetch @x402/evm viem

import { wrapFetchWithPaymentFromConfig } from '@x402/fetch';
import { ExactEvmScheme } from '@x402/evm';
import { privateKeyToAccount } from 'viem/accounts';

const account = privateKeyToAccount('0xYOUR_PRIVATE_KEY');

const fetchWithPayment = wrapFetchWithPaymentFromConfig(fetch, {
  schemes: [{ network: 'eip155:8453', client: new ExactEvmScheme(account) }],
});

const response = await fetchWithPayment('https://api.messari.io/ai/v2/chat/completions', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    messages: [{ role: 'user', content: 'What is the latest on Bitcoin?' }],
    verbosity: 'succinct',
    response_format: 'markdown',
    stream: false,
  }),
});

const data = await response.json();
console.log(data);