{"uid":"cap_MRfqUx-1muwYQHh8dk3tX","slug":"certificate-transparency-lookup-5f41d984","name":"Certificate Transparency Lookup","description":"Certificates in Certificate Transparency logs for a domain: recent certs, issuers, subdomains seen (Cert Spotter).","url":"https://dev-utils.x402tookit.com/cert-transparency?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":["domain"],"properties":{"domain":{"type":"string","description":"Registrable domain such as example.org (no scheme, no path)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"domain":{"type":["null","string"]},"newest":{"type":["null","object"],"properties":{"id":{"type":["null","string"]},"issuer":{"type":["null","string"]},"revoked":{"type":["boolean","null"]},"notAfter":{"type":["null","string"]},"nameCount":{"type":["null","number"]},"notBefore":{"type":["null","string"]}}},"recent":{"type":["array","null"],"items":{"type":"object","properties":{"id":{"type":["null","string"]},"issuer":{"type":["null","string"]},"revoked":{"type":["boolean","null"]},"notAfter":{"type":["null","string"]},"nameCount":{"type":["null","number"]},"notBefore":{"type":["null","string"]}}}},"source":{"type":["null","string"]},"issuers":{"type":["array","null"],"items":{"type":"object","properties":{"name":{"type":["null","string"]},"count":{"type":["null","number"]}}}},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"namesSeen":{"type":["array","null"],"items":{"type":"string"}},"sourceUrl":{"type":["null","string"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"revokedCount":{"type":["null","number"]},"wildcardNames":{"type":["array","null"],"items":{"type":"string"}},"namesSeenCount":{"type":["null","number"]},"namesTruncated":{"type":["boolean","null"]},"certificateCount":{"type":["null","number"]},"currentlyValidCount":{"type":["null","number"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_hcMjlwE9LtOKmj1Ik1EHF","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves Certificate Transparency log data for a domain, including recent certs, certificate issuers, and all subdomains observed via Cert Spotter.","exampleAgentPrompt":"Can you pull the certificate transparency log data for stripe.com — I want to see recent certs, who issued them, and all the subdomains that have shown up in CT logs?","exampleUseCases":[{"title":"Subdomain discovery for security audit","prompt":"I'm doing a security audit of acmecorp.com — can you use certificate transparency logs to find all subdomains that have ever had a TLS cert issued for them?"},{"title":"Checking for unauthorized certificate issuance","prompt":"Someone might have issued an unauthorized SSL certificate for mybrand.io — can you pull the CT log history and show me all recent certs and their issuers so I can spot anything suspicious?"},{"title":"Mapping third-party certificate authorities in use","prompt":"Which certificate authorities have issued certs for shopify.com over the past few years? Pull the CT log data so I can see the full issuer breakdown."}],"resultDescription":"Returns a structured object containing: the domain queried, a summary verdict, a list of recent certificates (each with ID, issuer, notBefore/notAfter dates, revocation status, and name count), a deduplicated list of certificate issuers with counts, all DNS names seen across certificates (namesSeen), wildcard names, total names count, revoked certificate count, a source URL to the raw Cert Spotter data, and optional disclaimer or degraded-service flags.","failureModes":["Domain not found in CT logs returns empty arrays and null fields","Invalid domain format (includes scheme or path) returns a validation error","CT log upstream (Cert Spotter) unavailable may return degraded:true with partial data","Rate limiting or upstream timeout may result in incomplete results","Very new domains with no certificates return empty/null cert lists"],"whenToPreferThis":"Use this endpoint when you need passive, non-intrusive subdomain enumeration or certificate audit data sourced from public CT logs — no active scanning or DNS queries are performed. Prefer this over DNS brute-forcing or active scanners when stealth or read-only reconnaissance is required, or when you need historical issuer data and revocation status rather than current DNS resolution.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-02T12:30:57.894Z","isFirstParty":false,"canonicalSlug":"certificate-transparency-lookup-5f41d984"}