ToolVet
78trust / 100

Verify Redirect

by ScrapeCheck in Security & trust

x402 APIPassing, checked 2 h ago

Redirect tier (deterministic, no LLM): verifies where a public URL actually leads: final URL (byte-exact), first response status, and hop count of the HTTP chain, walked twice with per-hop SSRF checks. Use it to confirm a link or a moved page points where it claims. Loops and unstable chains return unverifiable, never a guess. 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-redirect

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
220 ms typical, 340 ms slowest 5%
Last check
2 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-redirect" \
  -H "content-type: application/json" \
  -d '{"claim":{"final_url":"https://scrapecheck.fly.dev/price-mismatch-checker","first_status":301,"hops":1},"url":"https://scrapecheck.fly.dev/audit"}'
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-redirect
const res = await pay("https://scrapecheck.fly.dev/verify-redirect", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"claim":{"final_url":"https://scrapecheck.fly.dev/price-mismatch-checker","first_status":301,"hops":1},"url":"https://scrapecheck.fly.dev/audit"}),
});
console.log(await res.json());

Example input

{
  "claim": {
    "final_url": "https://scrapecheck.fly.dev/price-mismatch-checker",
    "first_status": 301,
    "hops": 1
  },
  "url": "https://scrapecheck.fly.dev/audit"
}

Example output

{
  "check_type": "redirect_chain_v1",
  "confidence": 0.95,
  "engine": "web_field_v1/0.2.1+6739b7f9ebf8",
  "evidence": {
    "lens_votes": {},
    "refetch_excerpt": "301 https://scrapecheck.fly.dev/audit -> 200 https://scrapecheck.fly.dev/price-mismatch-checker",
    "refetched_at": "2026-08-28T00:00:00.000Z",
    "second_fetch_at": "2026-08-28T00:00:01.000Z"
  },
  "key_id": "k2",
  "reasons": [
    "the chain settles at the claimed final URL (byte-exact)",
    "first response status is 301 as claimed",
    "the chain has 1 redirect hop(s) as claimed"
  ],
  "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
2 h agoPassed402389 ms$0.002
5 h agoPassed402219 ms$0.002
9 h agoPassed402133 ms$0.002
12 h agoPassed402224 ms$0.002
16 h agoPassed402220 ms$0.002
20 h agoPassed402340 ms$0.002
23 h agoPassed402216 ms$0.002
27 h agoPassed402212 ms$0.002
31 h agoPassed402219 ms$0.002
34 h agoPassed402279 ms$0.002
39 h agoPassed402323 ms$0.002