← The evidence ledger
Evidence row 120989
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://scrapecheck.fly.dev/verify-redirect
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 49fac77af3158a3a0dff5aa6b26e04975db1b7ef71f6e1fce8c8b3e445c18f3e
- Leaf
- 0x8b3f8660265271a283cb0f5087b7195baafbc5371ad5bc1eecfa7f6fe1a604f1
What was observed
{
"endpoints": [
[
"x402",
"https://scrapecheck.fly.dev/verify-redirect"
]
],
"name": "ScrapeCheck",
"owner_address": "0x455f20ec147477cafcd6d77c1604529f3c4ff665",
"raw": {
"accepts": [
{
"amount": "2000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x455F20eC147477CAFcd6D77C1604529f3c4Ff665",
"scheme": "exact"
},
{
"amount": "2000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0x455F20eC147477CAFcd6D77C1604529f3c4Ff665",
"scheme": "exact"
},
{
"amount": "2000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "4HuSbgqgKkeUM5jEzAzLGpxtivCGda9eEtYc2Sp1fLpM",
"scheme": "exact"
}
],
"description": "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.",
"extensions": {
"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_v1/0.3.2+17e21204a029",
"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"
}
]
},
"lastUpdated": "2026-10-26T00:14:43.021Z",
"quality": {
"l30DaysTotalCalls": 5,
"l30DaysUniquePayers": 4,
"lastCalledAt": "2026-10-26T00:14:42.916Z"
},
"resource": "https://scrapecheck.fly.dev/verify-redirect",
"serviceName": "ScrapeCheck",
"tags": [
"verification",
"redirects",
"links",
"web"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "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."
}What the leaf hashes
{"body":"49fac77af3158a3a0dff5aa6b26e04975db1b7ef71f6e1fce8c8b3e445c18f3e","id":120989,"kind":"listing","method":"baseline/1","observed_us":1793025619088578,"prev":null,"subject":"x402_bazaar:https://scrapecheck.fly.dev/verify-redirect","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0x8b3fa289e567c2ae9f18437ba820c691614c9fe833456410c00823e9eb79f42c
- 0x252fae9d448805f30491b53ee0867d145cb3c34d30fd4bf4a5f2caf872a3372a
- 0x1d4c9aa362bb5b8a75c3d5ae085485282f21fdd875e4db837f173f689ee8f0e1
- 0x8fc4b63af9dcb7b740e50556cf8225a225fa44b6195fd83ed7e447a497c03621
- 0x9be23c74991d04b7b6c8af862aec26660fd2b44e5a0d76bc8e38a614133b9887
- 0x6e76c7db38c8e146f2827626da3c1b5bcf0153e401a3b93b44f3f68dc478549f
- 0xb2d7872403b63e988ced4004f66e5c8db313b940eb8100aaa6a85ecfb00b64de
- 0x846eab73106c3cd8b899337bce966b558505a82d7cc8b02b4c1c7faff06c3367
- 0xee88fbeb53bd37ff3d897ec35c283d35063b90a3724c4194b03f948ccf02349f
- 0x06e192564a33f8e5303c5b3f24c4a64be258d0a0274ef3cfee7f4221b7582bc5
- 0x7d887da17795602ff54a7a2d145692904e47f8d3ab035b8db85d274d00bc9bfe
- 0x8cb11bf3bc7d3a6f859c170a167821024ffc4758cdfd2cc96f61a3291aefb637
- 0xd5ec7ffaecac790d8adfa0620b0a5494758f862e3090b49e556a6ecbad2f0782
- 0x78ac2b34737774659a6a411f4d10b8ba570d40699d9f277321c3a32ff03d1dc9
- 0x7eb603d37f0f22dae1ea013e391889906ffc0139ff26e25b044bee38eec8f9b2
- 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
- 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae