{"uid":"cap_otnl0DqlMIk9cMVnYZa5r","slug":"x402-web-probe-us-central-st-louis-90915683","name":"x402 Web Probe – US Central (St. Louis)","description":"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.","url":"https://rockndefi.xyz:8443/v1/check?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["url"],"properties":{"url":{"type":"string","description":"Public http(s) URL to check (ports 80/443)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"ok":{"type":"boolean"},"tls":{"type":"object"},"status":{"type":"number"},"timing":{"type":"object"}}}}}}},"responseSchema":{"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":[]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ehPn9L4ZSd5sLr5pMWpyu","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"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.","exampleAgentPrompt":"Can you check if https://example.com is up right now from US Central — I want to know the HTTP status, how fast it responds, and whether the TLS cert is still valid?","exampleUseCases":[{"title":"Pre-launch site availability check","prompt":"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?"},{"title":"SSL certificate expiry alert","prompt":"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."},{"title":"Redirect chain investigation","prompt":"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?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T12:31:40.657Z","isFirstParty":false,"canonicalSlug":"x402-web-probe-us-central-st-louis-90915683"}