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x402 Web Probe – US Central (St. Louis)
x402
x402 Web Probe – US Central (St. Louis) is a paid API for AI agents from rockndefi.xyz:8443, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-22).
Checks website uptime, HTTP status, TLS certificate validity, and latency from US Central (St. Louis), returning structured JSON results; pay-per-call via USDC on Base.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-call website uptime/latency/TLS checks and fetch-to-Markdown, measured from US Central (St. Louis). USDC on Base via x402. No account or API key.
Output
Returns a JSON object containing: whether the request succeeded (ok), HTTP status code, resolved IP address, TLS details (issuer, days_left, authorized), timing breakdown (dns_ms, ttfb_ms, total_ms), final URL after redirects, list of any redirects, and the probe node/region identifier.
Example use cases
Pre-launch site availability check
“Before we go live, can you verify that https://myapp.io is returning 200 OK, has a valid TLS cert, and is responding in under 500ms as measured from the US Central region?”
SSL certificate expiry alert
“Check https://shop.mybusiness.com and tell me how many days are left on its TLS certificate and who issued it — I want to know if we're at risk of it expiring soon.”
Redirect chain investigation
“I think https://oldsite.com is redirecting somewhere unexpected — can you probe it from US Central and show me the full redirect chain and the final URL it lands on?”
Technical details
Endpoint
GEThttps://rockndefi.xyz:8443/v1/check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, no-account pay-per-call HTTP probe from the US Central (St. Louis) geographic vantage point, especially for uptime checks, TLS certificate inspection, redirect tracing, or latency measurement without needing a full monitoring subscription. Ideal for one-off spot checks or agent-driven infrastructure validation where setting up an account with traditional monitoring services is impractical.
Side effects
- URL is unreachable or DNS fails — ok:false with no status or timing
- Target URL uses a non-standard port (not 80/443) — rejected by schema validation
- TLS certificate is invalid or expired — authorized:false in tls object
- Request times out — may return partial timing data or error
- Payment via x402/USDC fails — request not processed, HTTP 402 response
- Non-HTTP URL (e.g. ftp://) provided — rejected by type:http constraint
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ip": "93.184.215.14",
"ok": true,
"tls": {
"issuer": "DigiCert Inc",
"days_left": 60,
"authorized": true
},
"url": "https://example.com/",
"node": "vps2",
"region": "US Central (St. Louis)",
"status": 200,
"timing": {
"dns_ms": 3.1,
"ttfb_ms": 95.2,
"total_ms": 97.8
},
"final_url": "https://example.com/",
"redirects": []
}
}Tags
x402
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