{"uid":"cap_H3CBfJqQlrhxSlmP-F8eZ","slug":"domain-intel-whois-dns-tls-subdomain-lookup-x402-88a6b285","name":"Domain Intel — WHOIS, DNS, TLS & Subdomain Lookup (x402)","description":"Domain in, WHOIS, DNS, mail policy, TLS certificate and subdomains out. Pay per call in USDC over x402. No signup, no API key.","url":"https://dns.halowerk.com/domain/articles/ns-key-systems?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"domain":{"type":"string","maxLength":253},"baseline":{"type":"object","required":["domain","observed_at","records"],"properties":{"domain":{"type":"string","maxLength":253},"records":{"type":"array","items":{"type":"string","maxLength":254},"maxItems":50},"observed_at":{"type":"string","maxLength":40}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.009","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":"$0.009/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_UsMxxi7H7cCSgIzGrB_c6","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.009","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Given a domain name, returns WHOIS registration data, DNS records, mail policy (SPF/DKIM/DMARC), TLS certificate details, and discovered subdomains — paid per call in USDC via x402.","exampleAgentPrompt":"Pull a full domain intelligence report for stripe.com — I need the WHOIS registration info, all DNS records, mail policy settings, TLS certificate details, and any subdomains you can find.","exampleUseCases":[{"title":"Email security audit for onboarding vendor","prompt":"Before we onboard this vendor, check the domain security posture of acmecorp.io — specifically their SPF, DKIM, and DMARC mail policy settings and whether their TLS certificate looks legitimate."},{"title":"Subdomain enumeration for penetration test","prompt":"I'm doing a security assessment of targetclient.com — can you pull all discoverable subdomains and their DNS records so I can map the attack surface?"},{"title":"DNS change monitoring against baseline","prompt":"Here's a baseline snapshot of the DNS records for mycompany.com that we captured last month — compare it against the current state and tell me what has changed."}],"resultDescription":"Returns a structured object containing WHOIS registration details (registrar, dates, contacts), full DNS record set (A, MX, CNAME, TXT, NS, etc.), mail policy analysis (SPF, DKIM, DMARC presence and validity), TLS certificate metadata (issuer, validity dates, SANs), and an enumerated list of discovered subdomains.","failureModes":["Invalid or non-existent domain returns an error or empty result set","Rate limiting or payment failure via x402 prevents the call from completing","Firewall or DNS propagation delays may cause incomplete DNS record retrieval","WHOIS privacy protection may redact registrant contact details","TLS certificate lookup may fail for domains without HTTPS","Baseline comparison fails if baseline object schema is malformed or observed_at is unparseable"],"whenToPreferThis":"Choose this endpoint when you need comprehensive, multi-signal domain intelligence in a single call — WHOIS + DNS + mail policy + TLS + subdomains — without needing an API key or subscription. It is ideal for pay-as-you-go agent workflows where domain lookups are infrequent or one-off. Prefer it over dedicated WHOIS-only or DNS-only services when you want consolidated output and optional delta comparison against a stored baseline snapshot.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:40:37.152Z","isFirstParty":false,"canonicalSlug":"domain-intel-whois-dns-tls-subdomain-lookup-x402-4065472a"}