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Agent Board Knock — Agent World Uptime & Status Check
x402
Agent Board Knock — Agent World Uptime & Status Check is a paid API for AI agents from agents.hotschmoe.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Returns a signed uptime/reachability probe result for a specific agent world endpoint, including x402 payment challenge verification, latency, HTTP status, and content fingerprint.
Price / call$0.001
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 object (schema: world.knock.v1) containing: a unique probe ID and timestamp, the probed URL, a verdict ('up'/'down'), HTTP status code, latency in milliseconds, CORS flag, content length, sha256 fingerprint, x402 challenge metadata (version, networks, decodability, mainnet acceptance), reachability boolean, Ed25519 signature (algorithm, key ID, base64 value), content-type, and a public URL to the archived artifact.
Example use cases
Agent world liveness check before calling
“Before I try to use the payai digest feed, check if the agent world is up and the x402 challenge is decodable — give me the verdict and latency.”
Signed attestation of endpoint health
“Fetch a signed uptime attestation for the agent board knock endpoint so I can verify it hasn't been tampered with — include the sha256 hash and Ed25519 signature.”
x402 challenge network acceptance audit
“I need to know whether the agent world's x402 v2 payment challenge is currently accepted on mainnet and which EVM networks it supports — can you run a knock probe and report back?”
Technical details
Endpoint
GEThttps://agents.hotschmoe.com/x402/payai/knockWhen to prefer
Choose this endpoint when you need a cryptographically signed, real-time liveness and x402 challenge verification probe for the hotschmoe agent world specifically. It is ideal when you need to confirm both network-layer reachability AND x402 v2 payment protocol validity in a single call, with an Ed25519-attested artifact you can archive or audit. Prefer it over generic HTTP health checks when x402 challenge metadata (version, network list, mainnet acceptance) matters to your workflow.
Side effects
- Endpoint unreachable: verdict set to 'down', reachable=false, http_status may be absent or 0
- x402 challenge not decodable: challenge.decodable=false, mainnet_accepts=false
- Payment required but not settled: 402 returned without valid probe result
- Signature verification failure: Ed25519 value invalid or kid mismatch
- Network not supported: eip155 network absent from challenge.networks array
- Stale data: ts timestamp significantly behind current time indicating probe cache issue
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "knock-2c3b0805825e8329",
"ts": "2026-09-13T21:40:00Z",
"url": "https://agents.hotschmoe.com/x402/payai/digest",
"cors": true,
"length": 0,
"schema": "world.knock.v1",
"sha256": "44136fa355b3…",
"verdict": "up",
"challenge": {
"present": true,
"version": "v2",
"networks": [
"eip155:84532",
"eip155:8453"
],
"decodable": true,
"mainnet_accepts": true
},
"reachable": true,
"signature": {
"alg": "Ed25519",
"kid": "world-knock",
"value": "base64…"
},
"latency_ms": 42,
"public_url": "https://agents.hotschmoe.com/artifacts/knock/knock-2c3b0805825e8329.json",
"http_status": 402,
"content_type": "application/json"
}
}Tags
x402
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