Fetch with X402

npm install @x402/fetch @x402/core @x402/evm @x402/svm viem @solana/kit @scure/base dotenv
npm install --save-dev tsx

EVM_PRIVATE_KEY=0x...
SOLANA_PRIVATE_KEY=...

import dotenv from "dotenv";
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client, x402HTTPClient } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { registerExactSvmScheme } from "@x402/svm/exact/client";
import { privateKeyToAccount } from "viem/accounts";
import { createKeyPairSignerFromBytes } from "@solana/kit";
import { base58 } from "@scure/base";

dotenv.config();

async function main() {
  const evmKey = process.env.EVM_PRIVATE_KEY;
  const solanaKey = process.env.SOLANA_PRIVATE_KEY;
  if (!evmKey && !solanaKey) {
    throw new Error("Set EVM_PRIVATE_KEY or SOLANA_PRIVATE_KEY in .env");
  }

  const client = new x402Client();

  if (evmKey) {
    registerExactEvmScheme(client, {
      signer: privateKeyToAccount(evmKey as `0x${string}`),
    });
  }

  if (solanaKey) {
    const signer = await createKeyPairSignerFromBytes(base58.decode(solanaKey));
    registerExactSvmScheme(client, { signer });
  }

  const fetchWithPayment = wrapFetchWithPayment(fetch, client);
  const response = await fetchWithPayment(
    "https://api.hyperbrowser.ai/x402/web/fetch",
    {
      method: "POST",
      signal: AbortSignal.timeout(60_000),
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({
        url: "https://example.com",
        outputs: { formats: ["markdown", "links"] },
      }),
    }
  );

  const data = await response.json();
  if (!response.ok) {
    throw new Error(
      `Fetch failed (${response.status}): ${JSON.stringify(data)}`
    );
  }

  console.log("Fetch result:", JSON.stringify(data, null, 2));

  const httpClient = new x402HTTPClient(client);
  console.log(
    "Payment settled:",
    httpClient.getPaymentSettleResponse((name) => response.headers.get(name))
  );
}

main().catch((error) => {
  console.error(error);
  process.exitCode = 1;
});

npx tsx fetch.ts