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ScrapeCheck
x402
ScrapeCheck is a paid API for AI agents from scrapecheck.fly.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Independently re-fetches a source URL and returns a cryptographically signed pass/fail/unverifiable verdict confirming whether a scraped claim actually appears on that page.
Price / call$0.01
Success—
StatusUnknown
How this service works
Checks whether a value you did not fetch yourself is actually on the page it came from. Independently re-fetches the source and returns a signed pass/fail/unverifiable verdict. A claim is never certified unless the re-fetched page contains it, and anything unconfirmed is unverifiable, never pass. Server-rendered pages only. $0.01 per check. First 100 checks per client are free: resend this exact request with header X-Use-Free-Allowance: yes and no payment to use them.
Output
A JSON object containing a signed verdict ('pass', 'fail', or 'unverifiable'), a confidence score (0–1), an ed25519 cryptographic signature, a unique verdict_id UUID, an excerpt from the re-fetched page, the timestamp of the re-fetch, reasons explaining the decision, and lens votes (is_real, is_current, does_answer) indicating whether the claim was found, appears current, and answers the original request.
Example use cases
E-commerce price claim audit
“A competing tool says the Sony WH-1000XM5 headphones are listed at $279 on https://www.bestbuy.com/site/sony-wh1000xm5/6505727.p — can you re-fetch that page yourself and give me a signed confirmation whether that price actually appears there?”
Job listing detail verification
“My job-scraper says this posting at https://jobs.acme.com/positions/senior-engineer-123 lists a salary range of $140k–$160k and is still open — can you independently verify those details are actually on the page and return a verdict I can use?”
Real estate data integrity check
“Before I send a rental application, I need to confirm that the listing at https://www.zillow.com/homedetails/123-main-st/12345678_zpid/ actually shows a $2,200/month rent and says 'available now' — please verify those claims against the live page and give me a confidence score.”
Technical details
Endpoint
POSThttps://scrapecheck.fly.dev/verify?utm_source=zero.xyzWhen to prefer
Choose ScrapeCheck when you need a cryptographically signed, independently verified attestation that a value (price, availability, fact) actually appeared on a specific public webpage at a specific time — especially when the data came from a third-party scraper you do not fully trust. It is the right choice when auditability and non-repudiation matter, or when downstream decisions (purchases, applications, contracts) depend on scraped claim accuracy. Prefer it over simply re-scraping yourself when you need a tamper-evident signed verdict with a unique ID. Not suitable for JavaScript-heavy SPAs or pages behind authentication.
Side effects
- Verdict is 'unverifiable' if the page requires JavaScript rendering (server-rendered pages only)
- Verdict is 'fail' if the claimed value is not found anywhere in the re-fetched page
- Network errors or paywalls preventing re-fetch return 'unverifiable' rather than 'pass'
- Pages behind authentication or login walls cannot be verified
- Dynamically injected content (SPA/CSR) will not be confirmed — server-rendered HTML required
- Ambiguous or overly broad claims may return low confidence with 'unverifiable'
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | source page the scraper claims to have read (public http/https) |
| asked | string | the original request, plain text |
| claim | object | the scraper's claimed field values |
Output
Schema · Response
{
"type": "json",
"example": {
"engine": "web_field_v1/0.2.0+2ae28205cac4",
"key_id": "k2",
"reasons": [
"claimed price £51.77 found in re-fetched page; page shows \"in stock\""
],
"verdict": "pass",
"evidence": {
"lens_votes": {
"is_real": true,
"is_current": true,
"does_answer": true
},
"refetched_at": "2026-07-31T17:38:14.697Z",
"refetch_excerpt": "…$29.99…"
},
"signature": "ed25519:…",
"check_type": "web_field_v1",
"confidence": 0.97,
"verdict_id": "965abecd-a85f-45c7-98a2-49bde4bb9c51",
"source_hash": "sha256:…",
"verifier_url": "https://scrapecheck.fly.dev"
}
}Tags
x402
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