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AttestPage Web Page Fetch & Attestation
x402
AttestPage Web Page Fetch & Attestation is a paid API for AI agents from vehcdj664efetfrsolne5umanq.srv.us, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-17).
Fetches a live web page and returns signed, cryptographic evidence of its content, including page metadata, SHA-256 hash, and optional clean text — designed for AI agents to verify quotes and citations.
Price / call$0.002
Success—
StatusUnknown
How this service works
Signed evidence about web pages, for AI agents. Ask whether a quote appears on a page or check every citation in an answer at once, fetch a page and learn…
Output
Returns a JSON object containing page metadata (title, final URL after redirects, HTTP status, content kind), a SHA-256 hash of the fetched content, optionally up to 20,000 characters of clean extracted text, a signed cryptographic receipt for attestation, and an injection_flags array indicating any detected content anomalies. For batch requests (urls array), returns an array of such results, one per URL.
Example use cases
Citation verification for AI-generated answer
“I just got an answer from an AI that cited three URLs as sources. Can you fetch all three pages — https://example.com/article1, https://example.com/article2, and https://example.com/article3 — and get me signed evidence of what they actually say so I can check whether the quotes are real?”
Quote presence check on a live page
“Someone told me that https://www.who.int/news/item/xyz says 'vaccines prevent 3.5 to 5 million deaths every year' — can you fetch that page right now and give me cryptographic proof of whether that exact quote actually appears on it?”
Tamper-evident snapshot of a source
“Before I publish my research, can you fetch https://cdc.gov/flu/about/burden/index.html and return a signed receipt with the SHA-256 hash of the page so I have verifiable evidence of what it said at the time I cited it?”
Technical details
Endpoint
POSThttps://vehcdj664efetfrsolne5umanq.srv.us/v1/fetch?utm_source=zero.xyzWhen to prefer
Choose AttestPage when you need cryptographically signed, tamper-evident proof of what a live web page currently contains — especially for AI citation verification, fact-checking, or legal/compliance documentation. Prefer it over generic web scrapers when you need a receipt/hash for auditability, or when verifying up to 10 URLs in a single batch call at low cost ($0.002 per URL). It is purpose-built for AI agent grounding workflows where provenance and attestation matter.
Side effects
- URL is unreachable or returns non-2xx HTTP status — reflected in http_status field
- URL exceeds 2,048 character limit — request rejected
- More than 10 URLs submitted in batch — request rejected
- Page content is paywalled or bot-blocked — content_kind may reflect non-real content
- Both url and urls fields supplied simultaneously — request rejected
- Malformed or non-HTTP URL — validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | http(s) URL to fetch (max 2,048 characters). Send url or urls, not both. |
| urls | array | Instead of url: 1 to 10 distinct http(s) URLs in one call, priced per URL (the route price × the count). The answer is results[], one per URL, each with its own receipt. |
| return_text | boolean | Also return up to 20,000 characters of clean text (per page). Default false. |
Output
Schema · Response
{
"type": "json",
"example": {
"page": {
"title": "Example Domains",
"final_url": "https://www.iana.org/help/example-domains",
"http_status": 200,
"content_kind": "real",
"content_sha256": "…"
},
"text": "…Example Domains\n\nA number of domains … are maintained for documentation purposes…",
"tier": "paid",
"receipt": "eyJ…",
"injection_flags": []
}
}Tags
x402
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