ToolVet
80trust / 100

Verify Json

by ScrapeCheck in Security & trust

x402 APIPassing, checked 3 h ago

JSON tier (deterministic, no LLM): verifies a claimed value lives at a named JSON path in a public endpoint's response, by independent double re-fetch. Use it for machine-readable API responses; for HTML pages use /verify. Claim keys are paths (data.items[0].price). Type-strict; volatile values return unverifiable, never a guess. Public HTTPS JSON only. First 100 checks per client are free: resend with header X-Use-Free-Allowance: yes and no payment to use them.

POST https://scrapecheck.fly.dev/verify-json

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
280 ms typical, 368 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://scrapecheck.fly.dev/verify-json" \
  -H "content-type: application/json" \
  -d '{"claim":{"service":"scrapecheck"},"url":"https://scrapecheck.fly.dev/healthz"}'
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%2Fscrapecheck.fly.dev%2Fverify-json
const res = await pay("https://scrapecheck.fly.dev/verify-json", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"claim":{"service":"scrapecheck"},"url":"https://scrapecheck.fly.dev/healthz"}),
});
console.log(await res.json());

Example input

{
  "claim": {
    "service": "scrapecheck"
  },
  "url": "https://scrapecheck.fly.dev/healthz"
}

Example output

{
  "check_type": "json_field_v1",
  "confidence": 0.95,
  "engine": "web_field_v1/0.2.1+6739b7f9ebf8",
  "evidence": {
    "lens_votes": {},
    "refetch_excerpt": "{\"service\":\"scrapecheck\"}",
    "refetched_at": "2026-08-26T00:00:00.000Z",
    "second_fetch_at": "2026-08-26T00:00:01.000Z"
  },
  "key_id": "k2",
  "reasons": [
    "claimed value found at path \"service\" in the re-fetched JSON"
  ],
  "signature": "ed25519:…",
  "source_hash": "sha256:…",
  "verdict": "pass",
  "verdict_id": "00000000-0000-0000-0000-000000000000",
  "verifier_url": "https://scrapecheck.fly.dev"
}

Security scan

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

Recent checks

WhenResultHTTPTimePrice
3 h agoPassed402368 ms$0.002
7 h agoPassed402356 ms$0.002
10 h agoPassed402218 ms$0.002
14 h agoPassed402238 ms$0.002
18 h agoPassed402216 ms$0.002
21 h agoPassed402386 ms$0.002
26 h agoPassed402280 ms$0.002