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Proofwire Page Verification (Browser Render & Assert)
x402
Proofwire Page Verification (Browser Render & Assert) is a paid API for AI agents from verify.reversecaptcha.fun, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).
Renders a URL in a real browser, asserts presence of a CSS selector or text, and returns a signed verdict with screenshot evidence.
Price / call$0.01
Success—
StatusUnknown
How this service works
Close the loop on your own work with one paid call that returns a verdict plus Ed25519-signed, falsifiable evidence (verify signatures with GET /v1/keys). GET /v1/verify/http checks a URL is alive (redirect chain, TLS, latency, body hash). GET /v1/verify/dns resolves records and parses SPF/DMARC/DKIM. Email: POST /v1/verify/email/inbox issues a seed address; send mail to it, then GET /v1/verify/email?inbox=&token= returns delivery plus SPF/DKIM/DMARC alignment and raw headers (polls inside the paid window are free). Webhooks: POST /v1/verify/webhook arms a tripwire URL; register it upstream, then poll GET /v1/verify/webhook/{id}?token= for free. GET /v1/verify/page renders a page in a real browser, asserts a selector/text, and returns a screenshot URL. Failed work is never settled.
Output
A JSON object with a 'verdict' field ('pass' or 'fail'), plus an 'evidence' object containing the page title, extracted text, any console errors, and a time-limited signed screenshot URL. All evidence is Ed25519-signed for tamper-evident verification.
Example use cases
Post-deploy UI smoke test
“After I push to production, check that https://myapp.com/dashboard loads and the selector '#welcome-banner' is visible — I need a screenshot and a signed pass/fail verdict so I can gate the release.”
Confirm landing page copy went live
“Can you verify that https://company.com/pricing now shows the text 'New: Pro plan at $49/mo' somewhere on the page, and send me a screenshot as proof?”
Validate agent workflow outcome
“My automation just submitted a form — can you render https://portal.acme.com/success and confirm the phrase 'Submission received' appears, so I know the workflow completed successfully?”
Technical details
Endpoint
GEThttps://verify.reversecaptcha.fun/v1/verify/page?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need verified, tamper-evident proof that a webpage rendered correctly and contains specific content — especially for AI agent workflows that must close the loop on their own actions (form submissions, deploys, content updates). Prefer it over headless scraping tools when you need Ed25519-signed evidence for auditability, or when you must assert UI-level presence of a selector or text rather than just HTTP reachability.
Side effects
- Page does not load or returns non-200 — verdict is 'fail' with error detail
- Expected selector or text not found — verdict is 'fail' with extracted text for debugging
- TLS/certificate error on target URL — verdict is 'fail' with connection error
- Rendering timeout if page takes too long to load — verdict is 'fail'
- Invalid URL format in query param — request rejected with validation error
- Screenshot URL expiry — signed URLs are time-limited and will stop working after expiration
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"verdict": "pass",
"evidence": {
"title": "Example Domain",
"console_errors": [],
"extracted_text": "This domain is for use in documentation examples...",
"screenshot_url": "https://verify.example/evidence/....png?exp=...&sig=..."
}
}
}Tags
x402
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