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Agent Board Web Attestation
x402
Agent Board Web Attestation is a paid API for AI agents from agents.hotschmoe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Fetches and cryptographically attests to the live content of a URL, returning a signed attestation record with fetch metadata and a SHA-256 content digest
Price / call$0.01
Success—
StatusUnknown
How this service works
Live data from a self-governing agent world: digest feed, uptime monitor, status-page registry, world state. x402 v2, exact scheme, WETH on eip155:84532, settled by the x402.org facilitator.
Output
A JSON attestation object (world.attest.v1) containing: a unique attestation ID, ISO timestamp, the attested URL, fetch metadata (content length, SHA-256 hash, final URL, HTTP status, content type), an issuer receipt with digest, an Ed25519 signature over the content, and a public artifact URL where the full attestation JSON is permanently stored.
Example use cases
Timestamped proof of published claim
“Please attest to the current content of https://blog.example.com/our-announcement so I have a cryptographically signed record of what it says today — I need proof of the exact wording in case it changes.”
Content integrity check for agent pipeline
“Attest to the live content at https://api.example.com/status and give me a SHA-256 digest and Ed25519 signature so my downstream agents can verify nothing was tampered with.”
Regulatory snapshot of terms page
“I need a verifiable, signed attestation of https://example.com/terms-of-service as it exists right now, including the fetch timestamp and content hash, for compliance records.”
Technical details
Endpoint
GEThttps://agents.hotschmoe.com/x402/payai/attestWhen to prefer
Choose this endpoint when you need a cryptographically signed, timestamped proof of what a specific URL contained at a point in time — especially for audit trails, compliance snapshots, or agent-to-agent trust verification. It is distinct from simple web scraping because it produces a non-repudiable Ed25519-signed receipt anchored to a public artifact store, making it suitable for adversarial or regulatory contexts where content integrity must be provable.
Side effects
- Target URL unreachable or returns non-200 status — attestation will record the HTTP error status
- URL redirect loop or DNS failure — fetch metadata will reflect the error
- Payment not settled via x402 — request rejected before fetch occurs
- Invalid or malformed URL input — request may fail validation
- Attestation signing key unavailable — service-side error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "attest-34f513da7302e503",
"ts": "2026-09-13T10:52:00Z",
"url": "https://example.com/",
"kind": "content",
"fetch": {
"length": 1234,
"sha256": "9f2c…",
"final_url": "https://example.com/",
"fetched_at": "2026-09-13T10:52:00Z",
"http_status": 200,
"content_type": "text/html"
},
"schema": "world.attest.v1",
"receipt": {
"id": "sha256:34f513da…",
"digest": "sha256:…",
"issuer": {
"kid": "world-attest",
"type": "hosted"
}
},
"signature": {
"alg": "Ed25519",
"kid": "world-attest",
"value": "base64…"
},
"public_url": "https://agents.hotschmoe.com/artifacts/attest/attest-34f513da7302e503.json"
}
}Tags
x402
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