{"uid":"cap_nv_hksmtvXJlF2PkHqgFF","slug":"x402broker-com-b2a-email-deliverability-mx-spf-dmarc-verifier-26f81947","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-check)","url":"https://x402broker.com/v1/mx-check?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_10tqqWnueB0oHUSt7MLjT","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 domain status, role-account detection, and live DNS MX, SPF, and DMARC record presence.","exampleAgentPrompt":"Can you check if john.smith@acme-corp.com is a real, deliverable email — specifically whether the domain has valid MX records, passes SPF and DMARC checks, and isn't a disposable or burner address?","exampleUseCases":[{"title":"Lead list hygiene before outreach","prompt":"I have a sales lead with the email contact@prospectco.io — can you verify it's actually deliverable, has proper MX and SPF records, and isn't a throwaway address before I add them to my outreach sequence?"},{"title":"Sign-up fraud prevention check","prompt":"A new user just signed up with the email user1234@mailnull.com — can you check if that's a disposable or burner email provider and whether the domain even has real MX records?"},{"title":"B2B email infrastructure audit","prompt":"Before we start emailing partnerships@bigenterprise.com, can you confirm the domain has valid MX, SPF, and DMARC records set up so our messages won't bounce or go to spam?"}],"resultDescription":"Returns a structured object indicating email syntax validity, whether the domain belongs to a known disposable/burner provider, whether it is a role-based account (e.g. info@, admin@), and the live DNS lookup results for MX, SPF, and DMARC records including their presence and values.","failureModes":["Invalid or missing email parameter returns an error","DNS lookup timeout if the domain's nameservers are unresponsive","Disposable provider list may not cover all newly created throwaway services","Role-account detection based on prefix heuristics may have edge cases","Payment failure via x402 protocol results in 402 response before validation occurs"],"whenToPreferThis":"Choose this endpoint when you need a comprehensive, single-call email validation that combines syntax checking, live DNS MX/SPF/DMARC record verification, and disposable/burner domain detection together — especially in agentic B2A workflows requiring micropayment-native HTTP 402 integration. Prefer it over basic regex-only validators when deliverability assurance and spam/fraud risk signals are both required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:21:42.014Z","isFirstParty":false,"canonicalSlug":"b2a-email-deliverability-mx-spf-dmarc-verifier-aed51451"}