{"uid":"cap_KE2ts-XMpm7Sb3NgQfrkW","slug":"fastx402-email-auth-check-88d2570b","name":"FastX402 Email Auth Check","description":"200 pay-per-call tools for AI agents, from $0.001 per request in USDC on Base or Solana with x402. No account, no API key.","url":"https://fastx402.tools/email-auth-check?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["domain"],"properties":{"domain":{"type":"string","description":"Domain (or an email address) to audit"},"selectors":{"type":"string","description":"Optional extra DKIM selectors, comma-separated (max 10)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"mx":{"type":"array","items":{"type":"object","properties":{"host":{"type":"string"},"priority":{"type":"integer"}}}},"spf":{"type":"object","properties":{"all":{"type":"string"},"record":{"type":"string"},"present":{"type":"boolean"},"dnsLookups":{"type":"integer"}}},"bimi":{"type":"boolean"},"dkim":{"type":"object","properties":{"found":{"type":"array","items":{"type":"object","properties":{"keyType":{"type":"string"},"revoked":{"type":"boolean"},"selector":{"type":"string"},"strength":{"type":"string"}}}},"selectorsChecked":{"type":"integer"}}},"dmarc":{"type":"object","properties":{"pct":{"type":"integer"},"rua":{"type":"string"},"ruf":{"type":"string"},"aspf":{"type":"string"},"adkim":{"type":"string"},"policy":{"type":"string"},"record":{"type":"string"},"present":{"type":"boolean"},"subdomainPolicy":{"type":"string"}}},"grade":{"type":"string"},"score":{"type":"integer"},"domain":{"type":"string"},"exists":{"type":"boolean"},"mtaSts":{"type":"boolean"},"nullMx":{"type":"boolean"},"tlsRpt":{"type":"boolean"},"findings":{"type":"array","items":{"type":"object","properties":{"area":{"type":"string"},"message":{"type":"string"},"severity":{"type":"string"}}}}}}}}}},"responseSchema":{"type":"json","example":{"mx":[{"host":"github-com.mail.protection.outlook.com","priority":0}],"spf":{"all":"~all","record":"v=spf1 ip4:192.30.252.0/22 include:spf.protection.outlook.com include:_netblocks.google.com ... ~all","present":true,"dnsLookups":10},"bimi":false,"dkim":{"found":[{"keyType":"rsa","revoked":false,"selector":"google","strength":"rsa-2048-or-more"},{"keyType":"rsa","revoked":false,"selector":"k1","strength":"rsa-1024-or-less"}],"selectorsChecked":20},"dmarc":{"pct":100,"rua":"mailto:dmarc@github.com","ruf":"mailto:dmarc@github.com","aspf":"r","adkim":"r","policy":"quarantine","record":"v=DMARC1; p=quarantine; sp=reject; pct=100; rua=mailto:dmarc@github.com; ruf=mailto:dmarc@github.com; fo=1","present":true,"subdomainPolicy":"reject"},"grade":"B","score":80,"domain":"github.com","exists":true,"mtaSts":false,"nullMx":false,"tlsRpt":false,"findings":[{"area":"dkim","message":"selector k1 uses a weak (<=1024-bit) RSA key","severity":"warning"}]}},"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_Phv9OPcw679Z3QezyH3bH","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":"Audits a domain or email address for email authentication configuration including SPF, DKIM, DMARC, BIMI, MX, MTA-STS, and TLS-RPT records, returning a scored grade.","exampleAgentPrompt":"Can you audit the email authentication setup for acme.com — check its SPF, DKIM, DMARC, BIMI, MX, and MTA-STS records and give me an overall security grade?","exampleUseCases":[{"title":"Pre-send deliverability check","prompt":"Before we send out our newsletter campaign, can you audit the email auth configuration for ourcompany.com and flag any issues with SPF, DKIM, or DMARC that might cause deliverability problems?"},{"title":"Vendor email security vetting","prompt":"I want to make sure our supplier at payments-vendor.io has proper email authentication so we're not at risk of spoofed invoices — can you check their DMARC policy, SPF record, and DKIM setup and give them a grade?"},{"title":"Diagnosing spam folder issues","prompt":"Our emails from marketing.mybrand.com keep landing in spam — can you do a full email auth audit on that domain, including checking for weak DKIM keys and any DMARC misconfigurations, so I know what to fix?"}],"resultDescription":"A JSON object containing the domain's MX records, SPF record details (including DNS lookup count), DKIM keys found (selector, key type, strength, revoked status), DMARC policy (policy, subdomain policy, RUA/RUF addresses, alignment modes), BIMI presence, MTA-STS and TLS-RPT status, a list of actionable findings with severity levels, an overall numeric score (0–100), and a letter grade (e.g. A, B, C).","failureModes":["Domain does not exist — 'exists: false' returned with no auth data","DNS timeout or lookup failure for specific records — partial results with missing fields","Invalid domain or email format in query parameter — 400 Bad Request","More than 10 extra DKIM selectors requested — validation error","Payment failure via x402 — 402 Payment Required before data is returned"],"whenToPreferThis":"Choose this endpoint when you need a comprehensive, scored audit of all major email authentication mechanisms (SPF, DKIM, DMARC, BIMI, MTA-STS, TLS-RPT) for a domain in a single call without needing an API key or subscription. It is ideal for agents performing one-off domain audits, pre-campaign deliverability checks, or vendor security vetting at $0.002 per call via x402 micropayment.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T12:53:12.522Z","isFirstParty":false,"canonicalSlug":"fastx402-email-auth-check-88d2570b"}