x402 check before paying

Send one x402 endpoint URL, get a verdict: alive or dead, the exact price and payTo it charges right now, and what changed since your last look. One GET, no key. Agents call this before paying someone else. The call answers all three: alive (with the reason when it is not), the probe facts (HTTP status, latency, redirects, bytes, cutoff), the exact 402 the target serves right now (amount, asset, n

Open endpoint ↗

Price per call: $0.02
Chain: Base
Method: GET
Paid calls · 30 days: 0

Call it from code

This API is run by its own provider and paid directly through x402. We list it so you can find it; we don't route or hold the payment.

import { x402Client, wrapFetchWithPayment } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";

const client = new x402Client();
registerExactEvmScheme(client, { signer: agentAccount });

const pay = wrapFetchWithPayment(fetch, client);
const res = await pay("https://x402-catalog-history.ai-business-surface.workers.dev/check", { method: "GET" });
console.log(await res.json());

https://x402-catalog-history.ai-business-surface.workers.dev/check