Redirect tier (deterministic, no LLM): verifies where a public URL actually leads: final U
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.
2000 (raw units)
price
2
calls / 30d
2
unique payers
2026-08-30
updated
Provider
scrapecheck.fly.dev · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x455F20eC147477CAFcd6D77C1604529f3c4Ff665",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "2000",
"maxTimeoutSeconds": 300
},
{
"scheme": "exact",
"network": "eip155:137",
"payTo": "0x455F20eC147477CAFcd6D77C1604529f3c4Ff665",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"amount": "2000",
"maxTimeoutSeconds": 300
},
{
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "4HuSbgqgKkeUM5jEzAzLGpxtivCGda9eEtYc2Sp1fLpM",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"amount": "2000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"body": {
"claim": {
"final_url": "https://scrapecheck.fly.dev/price-mismatch-checker",
"first_status": 301,
"hops": 1
},
"url": "https://scrapecheck.fly.dev/audit"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"check_type": "redirect_chain_v1",
"confidence": 0.95,
"engine": "web_field_v1/0.2.0+2ae28205cac4",
"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"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"claim": {
"description": "see the route description; there is no asked field - this tier adjudicates exactly what it accepts",
"type": "object"
},
"url": {
"description": "public HTTPS URL",
"type": "string"
}
},
"required": [
"url",
"claim"
]
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"check_type": {
"description": "The check contract used, e.g. web_field_v1.",
"type": "string"
},
"confidence": {
"description": "The engine's confidence in the verdict, 0 to 1.",
"type": "number"
},
"engine": {
"description": "Engine name and version digest that produced the verdict.",
"type": "string"
},
"evidence": {
"description": "What the re-fetch observed.",
"properties": {
"lens_votes": {
"description": "Boolean votes is_real, is_current, does_answer from the judging lenses.",
"properties": {
"does_answer": {
"type": "boolean"
},
"is_current": {
"type": "boolean"
},
"is_real": {
"type": "boolean"
}
},
"type": "object"
},
"refetch_excerpt": {
"description": "Excerpt of the re-fetched page content the verdict was judged against.",
"type": "string"
},
"refetched_at": {
"description": "UTC timestamp of the engine's own fetch of the page.",
"type": "string"
}
},
"type": "object"
},
"key_id": {
"description": "Identifier of the signing key; resolve against GET /pubkey.",
"type": "string"
},
"reasons": {
"description": "The stated reasons for the verdict.",
"items": {
"type": "string"
},
"type": "array"
},
"signature": {
"description": "ed25519 signature over canonical sorted-key JSON of every field except signature.",
"type": "string"
},
"source_hash": {
"description": "sha256 of the normalized page text the verdict judged; null when no anchor text was obtained.",
"type": [
"string",
"null"
]
},
"verdict": {
"description": "One of pass, fail, unverifiable.",
"enum": [
"pass",
"fail",
"unverifiable"
],
"type": "string"
},
"verdict_id": {
"description": "Unique identifier for this verdict; its issuance is confirmable at GET /verdicts/{verdict_id}.",
"type": "string"
},
"verifier_url": {
"description": "The issuing service's URL; display only, never a trust root.",
"type": "string"
}
},
"required": [
"verdict_id",
"verdict",
"confidence",
"reasons",
"evidence",
"check_type",
"engine",
"key_id",
"verifier_url",
"source_hash",
"signature"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"errorNote": "A page that cannot be verified is NOT an error: unverifiable (or fail on /verify-presence) is a signed 200 verdict. 4xx means the request never reached the engine.",
"errors": [
{
"body": {},
"name": "Payment Required",
"note": "the x402 v2 challenge is not in the body; it is base64-encoded JSON in the PAYMENT-REQUIRED response header",
"status": 402,
"when": "any request without valid payment, a free-allowance header, or a service key — including requests with malformed bodies: payment is checked before input validation"
},
{
"body": {
"details": [
"url: Invalid url",
"claim: Required",
"asked: Required"
],
"error": "invalid input contract"
},
"name": "Bad Request",
"note": "details lists one entry per failing field, in the form \"<field>: <problem>\"",
"status": 400,
"when": "payment or allowance has cleared but the body does not match the input contract"
},
{
"body": {
"error": "rate limit exceeded — try again shortly"
},
"name": "Too Many Requests",
"status": 429,
"when": "requests exceed the per-minute rate limit, paid or not"
}
]
}Use it
curl
curl "https://scrapecheck.fly.dev/verify-redirect" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://scrapecheck.fly.dev/verify-redirect");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://scrapecheck.fly.dev/verify-redirect")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/6286.json, and this resource appears in /discovery/resources and /discovery/search.