{"uid":"cap_535TkBh4zamtySWnjqyia","slug":"domain-intel-spf-lookup-pay-per-call-via-x402-d6604e35","name":"Domain Intel SPF Lookup — pay-per-call via 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/spf-lookup-budget?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"domain":{"type":"string","pattern":"^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\\.)+[a-zA-Z]{2,63}$","maxLength":253}}},"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_r44tjX54S_blBE60Wy8_V","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":"Looks up SPF (mail policy) and comprehensive domain intelligence including WHOIS, DNS, TLS certificate, and subdomains for a given domain, paid per call in USDC over x402.","exampleAgentPrompt":"Can you look up the SPF record and full domain intelligence — WHOIS, DNS, TLS cert, and any subdomains — for halowerk.com?","exampleUseCases":[{"title":"Email deliverability SPF audit","prompt":"Check the SPF record and mail policy for sendgrid.net — I need to know if their SPF is properly configured before I whitelist their IPs."},{"title":"Pre-acquisition domain due diligence","prompt":"Pull up everything you can on acmecorp.io — WHOIS ownership, DNS setup, TLS cert details, and any subdomains — I'm evaluating it for acquisition."},{"title":"Phishing domain investigation","prompt":"I got a suspicious email from support@paypa1.com — can you look up the SPF, DNS records, WHOIS, and TLS certificate for paypa1.com to help me determine if it's legit?"}],"resultDescription":"Returns comprehensive domain intelligence for the queried domain, including SPF and other mail policy records, WHOIS registration data, DNS records, TLS/SSL certificate details, and discovered subdomains. Payment is deducted per call in USDC via the x402 protocol.","failureModes":["Invalid domain format — rejected by input pattern validation before the call is made","Domain does not exist or is not resolvable — may return empty or partial results","TLS certificate unavailable for domains without HTTPS","WHOIS data redacted for privacy-protected registrations","Subdomain enumeration may be incomplete depending on DNS configuration","Payment failure or insufficient USDC balance causes 402 rejection"],"whenToPreferThis":"Choose this endpoint when you need a single, no-signup, pay-per-call source for comprehensive domain intelligence — especially SPF/mail policy — without managing API keys or subscriptions. Ideal for agents running ad-hoc domain investigations, security audits, or email deliverability checks at low volume where the $0.009/call micropayment model is cost-effective.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:42:45.329Z","isFirstParty":false,"canonicalSlug":"domain-intel-spf-lookup-pay-per-call-via-x402-d6604e35"}