{"uid":"cap_Oy2QIWBJKUHcPDCC1LAk9","slug":"geekvault-email-auth-check-spf-dmarc-lookup-a2a752ac","name":"GeekVault Email Auth Check (SPF/DMARC Lookup)","description":"Network, docs, image, web, and dev utility tools paid per call via x402. No signup, no API keys, no subscriptions — just USDC on Base.","url":"https://api.geekvault.dev/net-tools/v1/email-auth-check?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","required":["host"],"properties":{"host":{"type":"string"}}},"responseSchema":{"type":"object","required":["host","note"],"properties":{"spf":{"type":["string","null"]},"host":{"type":"string"},"note":{"type":"string"},"dmarc":{"type":["string","null"]}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/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_REEC9fukYICjuA7zh6Zru","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":"Checks a domain's email authentication records (SPF and DMARC) to assess its email security configuration.","exampleAgentPrompt":"Can you check whether example.com has SPF and DMARC records set up for email authentication?","exampleUseCases":[{"title":"Pre-send email deliverability audit","prompt":"Before I launch this email campaign, can you check if my domain mailchimp-partner.com has valid SPF and DMARC records configured so my emails don't land in spam?"},{"title":"Security audit for suspicious sender domain","prompt":"I got an email from someone claiming to be at bigcorp.io — can you check whether that domain has proper SPF and DMARC email authentication set up so I can tell if it's likely spoofed?"},{"title":"Onboarding vendor email domain check","prompt":"We're onboarding a new vendor whose invoices come from payments.vendorco.com — can you verify their email domain has SPF and DMARC records before we whitelist them?"}],"resultDescription":"Returns the queried host, the SPF record string (or null if absent), the DMARC record string (or null if absent), and a human-readable note summarizing the authentication status of the domain.","failureModes":["Domain does not exist — returns null SPF and DMARC with an explanatory note","DNS timeout or resolution failure — may return error or empty records","Invalid host format provided — likely 400 or error note","Domain has no email authentication records at all — returns nulls with note indicating missing configuration","Payment not provided or insufficient USDC — 402 Payment Required response"],"whenToPreferThis":"Use this endpoint when you need a quick, no-signup DNS lookup for SPF and DMARC records on any domain, particularly for email security auditing, deliverability checks, or anti-spoofing validation. It is ideal for agents that need frictionless per-call access without managing API keys. Prefer this over manual DNS lookup tools when you want a structured JSON response with a plain-language note.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T07:27:04.711Z","isFirstParty":false,"canonicalSlug":"geekvault-email-auth-check-spf-dmarc-lookup-a2a752ac"}