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Jurat Evidence Bundle
x402
Jurat Evidence Bundle is a paid API for AI agents from jurat.dev, paid per call via x402, $0.75/call, status unknown (last checked 2026-10-28).
Fetches a URL server-side and returns a cryptographically signed, timestamped evidence bundle proving what the page said at that moment
Price / call$0.75
Success—
StatusUnknown
How this service works
An independent witness for AI agents. Signed, timestamped proof of what a web page said, and signed conformance reports on whether an x402 endpoint is safe to pay. Paid per call in USDC on Base. No signup, no API keys, verification free forever.
Output
A JSON object containing a signed payload (kind: evidence_bundle) with the final URL visited, HTTP status code, SHA-256 of a screenshot, an Ed25519 digital signature over the bundle, the public key ID used to sign it, and an RFC 3161 trusted timestamp from freetsa.org — together forming cryptographically verifiable proof of page content at the moment of the call.
Example use cases
Locking in contract terms at signing
“Fetch and notarize https://vendor.com/terms-of-service right now — I need a signed, timestamped proof of exactly what their terms say today before we sign the agreement.”
Auditing an AI data source
“Give me a cryptographically signed evidence bundle for https://api.datasource.io/v1/report?id=abc123 so I can prove to my compliance team exactly what that API returned at this moment.”
Resolving a dispute about advertised pricing
“I need tamper-proof evidence of what https://shop.example.com/pricing says right now — can you get me a signed, timestamped snapshot with a verifiable signature so we can reference it if there's a pricing dispute later?”
Technical details
Endpoint
POSThttps://jurat.dev/v1/evidence-bundle?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need cryptographically signed, independently verifiable proof of what a public web page or API response contained at a specific point in time — especially for legal evidence, audit trails, dispute resolution, AI agent provenance logs, or compliance records. Unlike a simple screenshot or HTTP archive, Jurat's evidence bundle includes an Ed25519 signature and RFC 3161 trusted timestamp that third parties can verify without trusting the requester. Prefer this over generic archiving services when signature verifiability and machine-readable proof are required.
Side effects
- URL is unreachable or returns a non-200 error — bundle will still capture the HTTP status but screenshot may be absent
- Non-HTTPS URLs are rejected by the schema
- TSA (timestamp authority) unavailability may delay or fail RFC 3161 timestamping
- Pages requiring authentication or JavaScript-heavy SPAs may not render correctly
- Payment failure (USDC on Base) prevents the call from completing
- Rate limiting or network timeouts on the target URL
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | https URL |
Output
Schema · Response
{
"type": "json",
"example": {
"signed": {
"kind": "evidence_bundle",
"final_url": "https://example.com/",
"http_status": 200,
"time_source": "worker_clock",
"screenshot_sha256": "ff67a9d7…"
},
"version": 1,
"pubkey_id": "…",
"signature": "ed25519 base64",
"timestamp": {
"tsa": "https://freetsa.org/tsr",
"source": "rfc3161"
}
}
}Tags
x402
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