Use Blockchain Money Map agent services over API

Payment Retry

Use the x402 client to convert the 402 challenge into a signed payment header, then retry the same request body. Blockchain Money Map accepts either signed header name below. Do not log, paste, or store the raw signed value.

X-PAYMENT: <signed-x402-payment>
PAYMENT-SIGNATURE: <signed-x402-payment>

SDK-style example

Run this only in a local agent runtime with a dedicated buyer wallet. Never send the buyer private key to this website.

import { x402Client, x402HTTPClient } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const endpoint = "https://api.blockchainmoneymap.com/api/x402/wallet-snapshot";
const body = {
  address: "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
  chain: "base"
};

const signer = privateKeyToAccount(process.env.BUYER_PRIVATE_KEY as `0x${string}`);
const client = new x402Client();
registerExactEvmScheme(client, { signer, networks: ["eip155:8453"] });
const httpClient = new x402HTTPClient(client);

const challenge = await fetch(endpoint, {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify(body)
});

if (challenge.status !== 402) throw new Error("Expected x402 payment challenge");
const challengeBody = await challenge.json();
const paymentRequired = httpClient.getPaymentRequiredResponse(
  (name) => challenge.headers.get(name),
  challengeBody
);
const paymentPayload = await httpClient.createPaymentPayload(paymentRequired);
const paymentHeaders = httpClient.encodePaymentSignatureHeader(paymentPayload);

const paid = await fetch(endpoint, {
  method: "POST",
  headers: { "content-type": "application/json", ...paymentHeaders },
  body: JSON.stringify(body)
});

console.log(await paid.json());