x402 Challenge Policy Check

Validate an x402 payment declaration before signing. Check a caller-supplied challenge against expected resource, network, asset, payee and exact spending limits; return mismatches and an integrity receipt. Offline only: no endpoint probe, uptime history, settlement test, safety clearance or payment authorization. New modular adapter: retained result recovery for 24 hours, minimal receipt metadata

Open endpoint ↗

Price per call: $0.01
Chain: Base
Method: POST
Paid calls · 30 days: 1

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://www.mahastrategies.com/api/v1/verify/payments/challenge-sanity", { method: "POST" });
console.log(await res.json());

https://www.mahastrategies.com/api/v1/verify/payments/challenge-sanity