X402 · Fact Check

Submit any claim; auto-routes to the relevant primary source. Pay 0.001 USDC on Base.

price

0.0010 USDC

rail

Base

facilitator

OMNIGATE

method

GET

endpoint https://mcp-x402.onrender.com/x402/fact-check

payTo 0x5bbd32e0478e49a7540ef2d760e0b0f9aa6328b2

asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

indexed 2026-10-25T20:10:49.000Z

Live 402 challenge

Hits the real endpoint without paying and shows exactly what it demands. Nothing is charged.

Pay from your agent

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

const signer = privateKeyToAccount(process.env.BUYER_PRIVATE_KEY);
const pay = wrapFetchWithPayment(fetch, { schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(signer) }] });

const res = await pay("https://mcp-x402.onrender.com/x402/fact-check", { method: "GET" });
console.log(await res.json(), res.headers.get("PAYMENT-RESPONSE"));

Example input

{
  "claim": "The 10-year Treasury yield is above 4%",
  "domain": "grants"
}

Example output

{
  "source": "https://mcp-x402.onrender.com/openapi.json",
  "claim": "The Earth orbits the Sun",
  "domain": "general",
  "verdict": "inconclusive",
  "evidence": {
    "note": "Domain auto-detected as general. Provide ?domain= hint for targeted grounding."
  },
  "verdict_key": "Domain unclear or source returned no usable data.",
  "_disclaimer": "Fact-check results are based on public government/FDA/SEC data. Not legal, medic"
}