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Web Capture – Signed Page Records
x402
Web Capture – Signed Page Records is a paid API for AI agents from web-capture.j0wn0.chatgpt.site, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-11).
Captures a webpage as screenshot, rendered HTML, and PDF with cryptographically signed file hashes for tamper-evident archival.
Price / call$0.1
Success—
StatusUnknown
How this service works
Keep a browser capture before a page changes. Screenshot, rendered HTML, PDF and signed file hashes for 0.10 USDC on Base.
Output
Returns a JSON object with a unique capture ID, a status field (e.g. 'ready'), a verification URL path where the signed record can be independently checked, and an independent_timestamp flag indicating whether a third-party timestamp was applied. The actual screenshot, rendered HTML, and PDF assets along with their signed file hashes are accessible via the verification URL.
Example use cases
Legal evidence preservation before takedown
“Archive https://socialmedia.com/post/12345 right now with a signed screenshot and PDF — I need a verifiable record of that post before it gets deleted.”
Compliance snapshot of vendor terms
“Take a signed capture of https://vendor.com/privacy-policy today — screenshot, rendered HTML, and PDF — so we have a tamper-evident record of the terms we agreed to at contract signing.”
Journalist documenting a live webpage claim
“I need you to preserve https://news-site.com/article/xyz with a cryptographically signed page record — screenshot, HTML, and PDF — so I can prove what the article said at this exact moment.”
Technical details
Endpoint
POSThttps://web-capture.j0wn0.chatgpt.site/v1/captures?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a tamper-evident, signed archival record of a webpage — not just a raw screenshot or simple scrape. It is ideal for legal discovery, compliance documentation, journalistic evidence, or any scenario where you must later prove what a page contained at a specific moment. Prefer it over generic screenshot APIs when cryptographic signing and a verifiable hash are required.
Side effects
- URL is unreachable or returns a non-200 status — capture fails with an error response
- Invalid or malformed URL input causes a 400 validation error
- Page requires authentication or blocks headless browsers — capture may be incomplete or blank
- Timeout if the target page is extremely slow to load
- Duplicate request_id may conflict with a prior capture
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| request_id | string |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "12345678-1234-4234-8234-123456789abc",
"status": "ready",
"verification_url": "/verify/12345678-1234-4234-8234-123456789abc",
"independent_timestamp": false
}
}Tags
x402
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