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AttestPage Quote Verifier
x402
AttestPage Quote Verifier is a paid API for AI agents from s2h6qt73jtzlgbgnnfacln2poq.srv.us, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-27).
Checks whether a specific quote appears on a live web page, returning match type (exact/fuzzy/none), character offsets, and a cryptographically signed timestamped receipt.
Price / call$0.01
Success—
StatusUnknown
How this service works
Checks a quote on its live page: exact, fuzzy or none, offsets and a signed receipt. US$0.01 per call; POST url, quote.
Output
Returns whether the quote was found (exact, fuzzy, or not found), the character offsets where it appears in the page, the similarity score for fuzzy matches, and a cryptographically signed timestamped receipt that serves as verifiable proof of the page's content at the time of the check.
Example use cases
Journalism source verification
“I'm writing an article and I cited https://bbc.com/news/article-123 as saying 'inflation fell to 2.1% in March' — can you do a fuzzy check to confirm that quote is actually on that page and get me a signed receipt I can keep as evidence?”
Legal contract publication check
“We need to confirm the phrase 'all disputes shall be governed by Delaware law' is still published exactly as-is on https://acmecorp.com/terms — run an exact match and give us a timestamped signed receipt.”
AI-generated citation fact-checking
“An AI tool told me that https://who.int/news/detail/vaccine-update says 'over 70% of adults are now vaccinated' — can you do a fuzzy match to verify if that claim actually appears on that page?”
Technical details
Endpoint
POSThttps://s2h6qt73jtzlgbgnnfacln2poq.srv.us/v1/verify/quote?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need both a match verdict AND a signed, timestamped receipt proving the result — ideal for journalism, legal evidence, compliance auditing, or any workflow where verifiable proof of a quote's presence on a live page is required. For batch verification of multiple quotes on one page, use the bulk variant (up to 20 quotes). For checking quotes across multiple URLs at once, use the multi-URL batch endpoint. For offline text comparison without fetching a live page, use the local text matching endpoint.
Side effects
- URL is unreachable or returns non-200 status — match result will be 'unreadable' or error
- Quote exceeds 1,000 characters after normalization — request rejected
- URL exceeds 2,048 characters — request rejected
- Page requires JavaScript rendering that cannot be fetched as static HTML
- Threshold below 0.5 rejected; must be 0.5–1.0
- case_sensitive set to true with match='passages' — invalid combination
- Payment not provided or insufficient — 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | http(s) URL of the page to check (max 2,048 characters). |
| match | string | exact; fuzzy (default), which also accepts small differences; or passages, for a paraphrased claim: the 3 passages that share most of its words, scored, as evidence for you to judge (not a verdict). |
| quote | string | Text to look for on the page, or with match "passages" the claim to find support for (max 1,000 characters after normalisation). |
| threshold | number | Fuzzy similarity needed, default 0.9. |
| case_sensitive | boolean | Default false; must be false with match "passages". |
Tags
x402
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