{"uid":"cap__tNHxT7hH5Rrb9C7fhXcC","slug":"x402-agent-services-ssl-certificate-checker-60874280","name":"x402 Agent Services – SSL Certificate Checker","description":"USDC pay-per-call APIs for AI agents via the x402 protocol (v2, exact, Base mainnet). Send a request, receive HTTP 402 with payment requirements, pay with @x402/fetch or any x402 client, retry with the PAYMENT-SIGNATURE header.","url":"https://call402.com/api/ssl-check?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"host":{"type":"string","description":"Domain name, optionally host:port (default port 443)"}}},"responseSchema":{"type":"json","example":{"host":"example.com","meta":{"source":"direct TLS handshake (first-party)"},"port":443,"issuer":{"O":"Let's Encrypt","CN":"R13"},"expired":false,"subject":{"CN":"example.com"},"valid_to":"Nov 30 00:00:00 2026 GMT","valid_from":"Sep  1 00:00:00 2026 GMT","serial_number":"03AB...","chain_verified":true,"days_remaining":40,"fingerprint256":"AA:BB:...","subject_alt_names":["example.com","www.example.com"]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Ch-hVWmiOoYnJgtQPU_9Z","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks the TLS/SSL certificate status of a given domain, returning expiry, issuer, chain validity, fingerprint, and SANs","exampleAgentPrompt":"Can you check the SSL certificate for api.mycompany.com — I want to know if it's valid, who issued it, and how many days are left before it expires?","exampleUseCases":[{"title":"Pre-launch HTTPS health check","prompt":"Before we go live tomorrow, check the SSL certificate on staging.myapp.com and confirm it's valid, trusted, and not expiring within the next 30 days."},{"title":"Monitor partner API cert expiry","prompt":"Check the TLS certificate on payments.partnerapi.com and tell me the exact expiry date and issuer so I can set up a renewal reminder."},{"title":"Diagnose HTTPS connection error","prompt":"Our users are getting SSL errors on secure.mystore.com — can you inspect the certificate and tell me if the chain is verified and whether the cert covers that hostname?"}],"resultDescription":"Returns a JSON object with the domain's TLS certificate details: issuer (O and CN), subject CN, validity window (valid_from / valid_to), days remaining, expiry status (expired boolean), chain verification result, SHA-256 fingerprint, serial number, port used, and list of subject alt names (SANs). Also includes a meta field indicating the data source (direct TLS handshake).","failureModes":["Domain does not exist or is unreachable — connection timeout or DNS failure","Port is not open or not serving TLS — connection refused","Certificate chain verification fails — chain_verified returns false","Invalid host format in request body — validation error","Payment not included — HTTP 402 returned with payment requirements before any check is performed"],"whenToPreferThis":"Use this endpoint when you need programmatic, real-time TLS certificate inspection for a specific domain — especially in agent workflows monitoring certificate expiry, validating HTTPS configuration before deployments, or diagnosing SSL errors. Prefer this over manual browser inspection or cert-monitoring SaaS dashboards when you need machine-readable certificate metadata on demand at low cost.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T06:42:48.676Z","isFirstParty":false,"canonicalSlug":"x402-agent-services-ssl-certificate-checker-60874280"}