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Web Evidence Capture & Change Detection
x402
Web Evidence Capture & Change Detection is a paid API for AI agents from gvfcs-159-89-4-32.free.pinggy.net, paid per call via x402, $0.005/call, status down (last checked 2026-10-13).
Fetches a URL and returns a cryptographic content hash, HTTP metadata, page title, sampled links, and change detection data as tamper-evident evidence
Price / call$0.005
Success—
StatusDown
How this service works
Website hosted for free through pinggy.io> <meta name=
Output
Returns the original URL, final URL after redirects, HTTP status code, page title, content size in bytes, SHA-256 hash of the page content, a sample of links found on the page, change detection metadata comparing to prior snapshots, and a payment receipt.
Example use cases
Legal proof of webpage content
“I need tamper-evident evidence of what https://competitor.com/pricing shows right now — get me the content hash, HTTP status, and page title so I can document it for a legal dispute.”
Monitor terms-of-service changes
“Check https://myvendor.com/tos for any content changes since the last time it was captured, and give me the SHA-256 hash so I can verify if anything was modified.”
Verify a URL redirects correctly
“Fetch https://old-domain.com/promo and tell me the final URL it lands on, the HTTP status code, and the content hash — I need to confirm the redirect is working and the destination page is unchanged.”
Technical details
Endpoint
POSThttps://gvfcs-159-89-4-32.free.pinggy.net/evidence?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, cryptographically verifiable snapshot of a webpage — especially for compliance, legal evidence, or change-detection workflows — rather than a full browser-rendered scrape. Ideal when you need the SHA-256 hash as proof of content state, HTTP metadata, and redirect tracing in a single call at minimal cost ($0.005 per call).
Side effects
- Target URL is unreachable or times out — returns error with no content hash
- URL returns non-200 HTTP status (e.g. 404, 500) — httpStatus field reflects actual code, content may be empty
- Redirect loop detected — finalUrl may differ or request fails
- Invalid or malformed URL input — returns validation error
- Tunnel host (pinggy.io) may be intermittently unavailable — service disruption possible
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| urlrequired | string | http(s) URL to capture evidence for |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| urlrequired | string | |
| bytes | integer | |
| title | string | |
| receipt | object | |
| finalUrl | string | |
| httpStatus | integer | |
| linksSample | array | |
| contentSha256required | string | |
| changeDetection | object |
Tags
x402
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