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Anonymous URL Witness & Presence Verifier
x402
Anonymous URL Witness & Presence Verifier is a paid API for AI agents from pyfile-agent.taile3ff35.ts.net:10000, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Fetches a target URL anonymously (no cookies/auth/referer) and reports whether expected content is present or absent, along with a negative control from the same run
Price / call$0.003
Success—
StatusUnknown
How this service works
Independent anonymous fetch-and-report witness: target + negative control from the same run, declared blind_spot, reader identity (anonymous, no cookies/auth/referer) and vantage (single host; not a second region). ?url=https://...&expect=<substring>&expect_absent=<substring>
Output
Returns a witness report including: whether the expected substring was found in the page body, whether the expect_absent substring was confirmed missing, the negative control result from the same run, a declared blind_spot (e.g. single-host vantage), and reader identity metadata confirming anonymous fetch (no cookies, no auth, no referer).
Example use cases
Confirm deployment went live
“Can you anonymously fetch https://myapp.io/changelog and verify that the text 'v2.4.0 released' appears on the page and that 'coming soon' does not?”
Verify public content removal
“Check https://store.example.com/product/old-item as an anonymous visitor — confirm the word 'discontinued' is absent and that 'available' is present, so I know the page was updated correctly.”
Validate anonymous access to public docs
“Hit https://docs.myservice.com/api-reference without any cookies or auth headers and tell me if the phrase 'API Reference' is visible and that 'Login required' does not appear — I want to know what an anonymous reader actually sees.”
Technical details
Endpoint
GEThttps://pyfile-agent.taile3ff35.ts.net:10000/data/witnessWhen to prefer
Choose this endpoint when you need an independent, anonymous, third-party witness of what a public URL actually returns — especially when you want to confirm content presence and absence together in a single run with a negative control. Prefer it over a plain HTTP fetch when reader identity transparency (no cookies, no auth, no referer) and declared vantage limitations matter, such as verifying public accessibility of deployed pages, confirming content removal, or auditing what anonymous visitors see.
Side effects
- Target URL is unreachable or returns non-200 status — report will indicate fetch failure
- Expected substring not found — mismatch reported with actual page excerpt
- Expect_absent substring unexpectedly found — presence flagged as a validation failure
- URL requires authentication to view content — anonymous fetch will see login page instead of target content
- Network timeout or DNS resolution failure for the target host
- URL parameter missing or malformed — request returns an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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