{"uid":"cap_asvIG1SoM-17LLd60NYhW","slug":"preflight-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-21970bfb","name":"B2A Email Deliverability, MX, SPF & DMARC Verifier","description":"Validates email syntax, disposable/burner provider status, role accounts, and live DNS MX/SPF/DMARC records. (Live x402 v2, IETF MPP & MCP endpoint at https://preflight.agentdiet.dev/v1/spf-dmarc-auditor)","url":"https://preflight.agentdiet.dev/v1/spf-dmarc-auditor?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","required":["email"],"properties":{"email":{"type":"string","minLength":1,"description":"Email address to validate for syntax, MX deliverability, and disposable risk"}}},"responseSchema":{"type":"object"},"example":null,"exampleRequest":null,"tags":[],"displayCostAmount":"0.005","displayCostAsset":"USD","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":"mpp","network":"tempo","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_055VGV5Xv7QbfwdQ2pk10","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"preflight.agentdiet.dev","brandSlug":"preflight-agentdiet-dev-mpp","brandBaseUrl":"https://preflight.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Validates an email address for syntax correctness, disposable/burner provider status, role-account detection, and live DNS MX/SPF/DMARC record checks.","exampleAgentPrompt":"Can you check if john.smith@acmecorp.com is a real, deliverable email address — and tell me whether the domain has valid MX, SPF, and DMARC records and if it's from a disposable or role account?","exampleUseCases":[{"title":"Pre-outreach lead email validation","prompt":"Before I add these leads to my cold email campaign, can you verify that sarah.jones@techstartup.io is a real deliverable address, not a burner, and that the domain has proper MX and SPF records set up?"},{"title":"Sign-up form disposable email check","prompt":"A user just tried to register with temp-mail123@guerrillamail.com — can you check if that's a disposable or throwaway email address and whether it would actually receive mail?"},{"title":"Email domain authentication audit","prompt":"I need to know if the domain for newsletter@bigcorp.com has SPF and DMARC DNS records properly configured so our emails to them won't get rejected as spam."}],"resultDescription":"Returns a structured object indicating email syntax validity, whether the provider is a known disposable/burner service, whether the address is a role account (e.g. info@, support@), and live DNS lookup results for MX, SPF, and DMARC records on the domain — giving a comprehensive deliverability assessment.","failureModes":["Invalid or malformed email string returns a syntax error or validation failure","Domain has no MX records, indicating email cannot be delivered","DNS lookup timeout if the domain's nameservers are slow or unreachable","Missing or empty email parameter returns a 400 bad request","Unknown or private TLDs may fail DNS resolution","Payment required (HTTP 402) if x402 USDC micropayment is not supplied"],"whenToPreferThis":"Choose this endpoint when you need a single-call, comprehensive email health check covering syntax, disposable provider detection, role account identification, and live DNS MX/SPF/DMARC validation — especially for B2B lead enrichment pipelines, sign-up fraud prevention, or pre-campaign deliverability audits. Prefer it over basic regex-only validators when you need real DNS verification, or over full email-sending test services when you just need a non-invasive read-only check.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T12:35:21.636Z","isFirstParty":false,"canonicalSlug":"preflight-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-2fe18696"}