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Web Evidence Capture API
x402
Web Evidence Capture API is a paid API for AI agents from btolb-159-89-4-32.free.pinggy.net, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).
Fetches a URL and returns cryptographic evidence including SHA-256 content hash, HTTP status, page title, byte size, and sampled links for verification purposes
Price / call$0.005
Success—
StatusUnknown
How this service works
Website hosted for free through pinggy.io> <meta name=
Output
Returns a JSON object containing the original URL, final redirected URL (if any), HTTP status code, page title, content size in bytes, a SHA-256 hash of the page content, a sample array of links found on the page, a change detection object indicating whether content has changed, and a payment receipt object confirming the x402 micropayment was processed.
Example use cases
Legal content preservation
“I need verifiable proof of what this webpage says right now — can you fetch https://contractor-dispute.com/invoice-terms and give me the SHA-256 hash, HTTP status, and page title so I can use it as evidence?”
Website uptime and integrity check
“Check https://myapp.io/privacy-policy for me and return its content hash and HTTP status — I want to confirm it's live and record exactly what it contains at this moment.”
Detecting unauthorized content changes
“Fetch https://partner-site.com/agreement and capture the SHA-256 hash and change detection info — I want to know if the content has changed since we last checked it.”
Technical details
Endpoint
POSThttps://btolb-159-89-4-32.free.pinggy.net/evidence?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need cryptographic proof (SHA-256) of a webpage's content at a specific point in time, especially for legal, compliance, or audit use cases. It is also useful for lightweight change detection workflows where you compare successive content hashes. Prefer it over a generic scraper when the integrity and verifiability of the captured content matters more than structured data extraction.
Side effects
- URL is unreachable or returns a non-200 status — httpStatus field reflects the actual code but evidence may be incomplete
- URL redirects to an unexpected destination — finalUrl will differ from input url
- Malformed or non-HTTP URL input — likely returns a 400 validation error
- Target page blocks automated fetching (e.g. bot detection) — content hash may reflect an error/block page rather than real content
- Network timeout on the tunneled Pinggy host — service may be intermittently unavailable as it runs on a free tunnel
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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