Heinrichstech · CDP Echo

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

const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);

const res = await fetchWithPay("https://app.heinrichstech.com/v1/cdp/echo", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "message": "hello bitbooth"
  }),
});
const data = await res.json();

curl -X POST \
  "https://app.heinrichstech.com/v1/cdp/echo" \
  -H "Content-Type: application/json" \
  -d '{"message":"hello bitbooth"}' \
  -H "X-PAYMENT: <signed x402 payment>"

{
  "ok": true,
  "payment": {
    "network": "eip155:8453",
    "payer": "0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
    "transaction": "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
  },
  "protocol": "x402 + CDP Facilitator",
  "service": "BitBooth /v1/cdp/echo",
  "timestamp": "2026-05-05T12:00:00.000Z",
  "youSent": "hello bitbooth"
}