{"uid":"cap_-46lDJTDEKQroTFdAL140","slug":"datakoot-subdomain-lookup-7c7475af","name":"Datakoot Subdomain Lookup","description":"48 live public-data tools (security, packages, SEC filings, economy, FX, weather, domains, Federal Register, Base) for AI agents. $0.002 USDC per call on Base via x402, charged only on success. The same tools are free for 100 calls/day via MCP at <server>.datakoot.com/mcp.","url":"https://x402.datakoot.com/api/subdomains?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"domain":{"type":"string","description":"Registrable domain, e.g. stripe.com"}}},"responseSchema":{"type":"json","example":{"count":16,"domain":"datakoot.com","source":"Cert Spotter (SSLMate), first page of results","available":true,"truncated":true,"subdomains":["base.datakoot.com","build.datakoot.com"],"_datakoot_note":"Free tier: results capped at 10 items. Upgrade for full results at https://datakoot.com","free_tier_note":"Shortened for the free tier: list results are capped at 10 items per call — subdomains (10 of 16). The counts in this re"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_9oOwlJ_cdPi0E6mvlHA4k","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns all known subdomains for a given registrable domain using certificate transparency log data from Cert Spotter (SSLMate).","exampleAgentPrompt":"Can you list all the subdomains for stripe.com using certificate transparency data?","exampleUseCases":[{"title":"Security attack surface audit","prompt":"I'm doing a security audit — can you pull all known subdomains for acme.com so I can see what services are publicly exposed?"},{"title":"Competitor infrastructure reconnaissance","prompt":"I want to understand what services Shopify exposes publicly — can you look up all subdomains for shopify.com?"},{"title":"OSINT domain investigation","prompt":"I'm investigating a domain called suspicious-site.com — can you find all its subdomains so I can map out the full infrastructure?"}],"resultDescription":"Returns a JSON object with the total subdomain count, the queried domain, the data source (Cert Spotter/SSLMate), an availability flag, a truncation flag indicating if results were capped, and an array of discovered subdomains. Free tier caps list results at 10 items per call.","failureModes":["Invalid or malformed domain input returns an error","Domain with no certificate transparency records returns empty subdomains array","Free tier cap limits results to 10 subdomains even if more exist (truncated=true)","Payment failure on Base blockchain results in no charge and no response","Rate limit exceeded on free MCP tier (100 calls/day)"],"whenToPreferThis":"Choose this endpoint when you need fast, certificate-transparency-based subdomain enumeration for a single domain and want pay-per-use pricing with no subscription. Prefer over DNS brute-force tools when you want passive, non-intrusive discovery. Prefer over manual Cert Spotter queries when integrating into an AI agent workflow with x402 micropayment support.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:45:33.522Z","isFirstParty":false,"canonicalSlug":"datakoot-subdomain-lookup-7c7475af"}