{"uid":"cap_TUrTXsXzXtXMrN5_gredu","slug":"vextorium-subdomain-discovery-via-certificate-transparency-9f0f7ac0","name":"Vextorium Subdomain Discovery via Certificate Transparency","description":"Subdomains of a domain found in public Certificate Transparency logs (every TLS certificate issued): names, wildcard count and certificate dates. For asset inventory, audits and OSINT.","url":"https://api.vextorium.com/subdominios-pago?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"limite":{"type":"integer"},"dominio":{"type":"string"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_aGMr537vdXd3rw-nBjvtk","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns all subdomains of a given domain found in public Certificate Transparency logs, including subdomain names, wildcard count, and certificate dates.","exampleAgentPrompt":"Can you look up all subdomains of example.com that have appeared in Certificate Transparency logs? Limit the results to 50 subdomains.","exampleUseCases":[{"title":"Attack surface mapping for pentest","prompt":"I'm doing a security assessment of acmecorp.com — can you pull all their subdomains from Certificate Transparency logs so I can map out their full attack surface? Show me up to 100 results."},{"title":"Forgotten subdomain audit","prompt":"We recently inherited the domain oldcompany.io and need to know every subdomain that's ever had a TLS certificate issued for it — fetch that list from CT logs so we can see what infrastructure might still be live."},{"title":"Competitor OSINT research","prompt":"I'm researching the infrastructure footprint of bigtech.com for competitive intelligence — can you enumerate all their subdomains visible in Certificate Transparency logs, including when the first and most recent certificates were issued?"}],"resultDescription":"Returns a JSON object containing the queried domain, a list of subdomain objects (each with name and latest certificate date), the total subdomain count, wildcard count, the date of the first certificate ever seen, the number of certificates analyzed, and the data source. May include a note field with additional context.","failureModes":["Domain not found in CT logs — returns empty subdomain list with zero counts","Invalid or malformed domain input — likely returns an error or empty result","Rate limiting — too many requests may result in errors","Limit parameter ignored or capped at a server-side maximum","Very new domains with no issued certificates return no results"],"whenToPreferThis":"Use this endpoint when you need passive, non-intrusive subdomain discovery sourced from public Certificate Transparency logs without sending any traffic to the target domain. It is ideal for OSINT, asset inventory, and security audits where stealth or comprehensiveness of historical data matters. Prefer this over active DNS brute-forcing tools when you want a purely passive approach or need certificate issuance dates alongside subdomain names.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T12:36:42.864Z","isFirstParty":false,"canonicalSlug":"vextorium-subdomain-discovery-via-certificate-transparency-9f0f7ac0"}