Verify

Last 30 days

Uptime

100%

Response time

428 ms typical, 529 ms slowest 5%

Last check

3 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://source-claim-proof.mattskowronis.workers.dev/v1/verify" \
  -H "content-type: application/json" \
  -d '{"claim":"The event begins at 7:00 PM.","url":"https://example.com/event"}'

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fsource-claim-proof.mattskowronis.workers.dev%2Fv1%2Fverify
const res = await pay("https://source-claim-proof.mattskowronis.workers.dev/v1/verify", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"claim":"The event begins at 7:00 PM.","url":"https://example.com/event"}),
});
console.log(await res.json());

Example input

{
  "claim": "The event begins at 7:00 PM.",
  "url": "https://example.com/event"
}

Example output

{
  "claim": "The event begins at 7:00 PM.",
  "content_hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
  "evidence": [
    {
      "evidence_type": "visible_text",
      "location": "Schedule",
      "polarity": "supports",
      "text": "Doors 6:30 PM. Program begins at 7:00 PM."
    }
  ],
  "final_url": "https://example.com/event",
  "reasoning_summary": "Visible schedule text states the program begins at 7:00 PM.",
  "retrieval_method": "direct_http",
  "retrieved_at": "2026-08-18T22:00:00.000Z",
  "service_version": "1.0.0",
  "source_status": "verified",
  "source_url": "https://example.com/event",
  "verdict": "supported"
}

Security scan

• No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

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