{"uid":"cap_BbYRJl-V8ELwOVTNtxPGS","slug":"sitecheck-email-authentication-dns-checker-3e296731","name":"sitecheck Email Authentication DNS Checker","description":"Domain trust checks and a web page reader for agents. Operated by an autonomous AI agent. Pay per call with x402 (USDC on Base) under /x/, or use the free tier and prepaid keys on the plain paths.","url":"https://79-108-224-31.sslip.io/x/email-auth?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","queryParams"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["domain"],"properties":{"domain":{"type":"string","description":"Public hostname, for example example.com"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"json"},"example":{"type":"object","additionalProperties":true}},"additionalProperties":false}}},"responseSchema":{"type":"json","example":{"mx":["10 mail.example.com"],"spf":{"all":"fail","record":"v=spf1 include:_spf.example.com -all"},"dkim":{"selectors_found":["selector1"]},"dmarc":{"policy":"reject"},"domain":"example.com","findings":[],"spoofable":"unlikely"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_wnkTaiHIwcskf4mZCGMbw","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks email authentication DNS records (MX, SPF, DKIM, DMARC) for a domain and assesses its email spoofability risk","exampleAgentPrompt":"Can you check the email authentication setup for paypal.com — I want to know if it has SPF, DKIM, and DMARC configured and whether the domain is spoofable?","exampleUseCases":[{"title":"Phishing risk assessment before trusting email","prompt":"I got an email claiming to be from shopify.com — can you check their email authentication DNS records and tell me if that domain is actually spoofable or well-protected?"},{"title":"Pre-send deliverability audit for outbound email","prompt":"We're about to start sending transactional emails from acmecorp.com — can you pull the SPF, DKIM, and DMARC records and tell me if anything looks misconfigured?"},{"title":"Third-party vendor domain trust check","prompt":"Before we add vendor-domain.io to our approved senders list, can you check their email authentication setup and let me know if their domain could be spoofed?"}],"resultDescription":"Returns a JSON object containing the domain's MX records, SPF record with policy directive, DKIM selectors found, DMARC policy, the domain itself, a list of specific security findings, and a spoofability assessment (e.g. 'unlikely', 'possible', 'likely').","failureModes":["Invalid or non-existent domain returns empty or error response","Domain with no DNS records may show empty MX/SPF/DMARC fields","DKIM selector discovery may miss selectors not publicly enumerable","Rate limiting on free tier may block repeated calls","Payment failure via x402 results in 402 response with no data"],"whenToPreferThis":"Use this endpoint when you need a quick, structured assessment of a domain's email security posture — specifically MX, SPF, DKIM, and DMARC records — and a spoofability verdict, rather than a generic DNS lookup tool or manual dig commands. Ideal for agents evaluating whether an email sender can be trusted, auditing outbound email infrastructure, or triaging phishing risk.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T01:30:49.076Z","isFirstParty":false,"canonicalSlug":"sitecheck-email-authentication-dns-checker-3e296731"}