{"uid":"cap_f_XPScMJXnjBx6hXJOMMq","slug":"x402broker-com-b2a-email-deliverability-mx-spf-dmarc-verifier-28e27fc9","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://x402broker.com/v1/mx-deliverability-verifier)","url":"https://x402broker.com/v1/mx-deliverability-verifier?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_arHNDo3OaDM2VYI5YM_4K","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"x402broker.com","brandSlug":"x402broker-com-mpp","brandBaseUrl":"https://x402broker.com","brandDocsUrl":null,"whatItDoes":"Validates an email address for syntax correctness, disposable/burner provider status, role account detection, and live DNS MX, SPF, and DMARC record checks.","exampleAgentPrompt":"Can you check whether john.doe@acmecorp.com is a real, deliverable email address — specifically whether the domain has valid MX records, passes SPF and DMARC checks, and isn't from a disposable email provider?","exampleUseCases":[{"title":"Pre-send bounce prevention for outreach","prompt":"Before I send this sales email, can you verify that james.wilson@techstartup.io is actually deliverable — check the MX records and make sure the domain isn't missing SPF or DMARC?"},{"title":"Fake signup detection at registration","prompt":"A new user just signed up with mailinator123@guerrillamail.com — can you check if that's a throwaway burner email so I can decide whether to block the account?"},{"title":"CRM lead quality audit","prompt":"I have a lead with the email contact@globalventures.co — can you tell me if it's a role account, whether the domain has working mail servers, and if SPF and DMARC are configured properly?"}],"resultDescription":"Returns a structured object covering: email syntax validity, whether the domain is a known disposable/burner provider, whether it is a role-based address (e.g. info@, admin@), live MX record lookup results indicating whether the domain can receive mail, SPF record presence and content, and DMARC policy record status — giving an overall deliverability assessment.","failureModes":["Invalid or malformed email format returns a syntax error flag","Domain does not exist or has no DNS records, resulting in MX lookup failure","Temporary DNS resolution timeout may return inconclusive MX status","Disposable provider list may not include newly created throwaway domains","Payment required error (HTTP 402) if x402 payment is not attached or fails"],"whenToPreferThis":"Choose this endpoint when you need a comprehensive, real-time email deliverability check that combines syntax validation, disposable/burner detection, role account flagging, and live DNS MX/SPF/DMARC verification in a single call — especially useful for B2B lead qualification, fraud prevention at signup, or pre-campaign email list hygiene. Prefer this over simple format-only validators when you need live DNS confirmation that the domain can actually receive mail.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:25:51.189Z","isFirstParty":false,"canonicalSlug":"b2a-email-deliverability-mx-spf-dmarc-verifier-aed51451"}