{"uid":"cap_gKnssWsk-tEEG7Nrts6Ti","slug":"b2a-email-deliverability-mx-spf-dmarc-verifier-aed51451","name":"B2A Email Deliverability, MX, SPF & DMARC Verifier","description":"15-App Autonomous Business-to-Agent (B2A) API Hub & MCP Suite. Supports Web Distillation, On-Chain Risk, DEX Token Intelligence, B2B Lead Enrichment, Domain OSINT, Email Verification, SEC Filings, GitHub Audits, Prompt Firewall, and native HTTP 402 (x402 Base USDC).","url":"https://x402broker.com/v1/email-verify?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","POST"],"type":"string"},"queryParams":{"type":"object","properties":{"email":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"data":{},"status":"ok","roi_proof":{"compression_ratio_pct":91.4}}},"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"},{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_3E0gn2BbMjrPppex0f6u4","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null},{"uid":"pm_PHc8Wzc_b1oB1q7cG0eL-","protocol":"mpp","methodType":"crypto","chain":"tempo","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":"Validates an email address for deliverability by checking MX records, SPF, DMARC configuration, and mailbox existence.","exampleAgentPrompt":"Can you verify whether john.doe@acmecorp.com is a real, deliverable email address — check its MX records, SPF, and DMARC too?","exampleUseCases":[{"title":"Pre-outreach email list scrubbing","prompt":"Before I send this cold email campaign, can you validate these addresses — start with ceo@startupxyz.io — check if it's actually deliverable and if the domain has proper MX, SPF, and DMARC records set up?"},{"title":"CRM lead quality check","prompt":"I just got a lead from a form submission with the email contact@globaltrade-partners.com — can you verify it's a real, deliverable address before I add it to our CRM?"},{"title":"Email infrastructure audit for a prospect","prompt":"I'm doing due diligence on Meridian Logistics — can you check if their domain email (info@meridianlogistics.com) has valid MX records and whether they have SPF and DMARC configured correctly?"}],"resultDescription":"Returns a JSON object with a status field and a data object containing email deliverability verdicts, MX record presence, SPF record details, DMARC policy information, and mailbox existence signals. Also includes an roi_proof field showing compression/efficiency metrics.","failureModes":["Invalid or malformed email address returns an error status","Domain with no MX records returns non-deliverable result","Timeout or DNS lookup failure for obscure domains","Missing email query parameter returns a 400-level error","Rate limiting or payment failure (402) if USDC balance is insufficient"],"whenToPreferThis":"Choose this endpoint when you need a single, fast email verification that checks not just format but actual DNS-level deliverability signals (MX, SPF, DMARC) in one call. Prefer it over generic SMTP-ping tools when you also need domain security posture (SPF/DMARC) alongside deliverability. The x402/USDC micropayment model makes it suitable for per-address pay-as-you-go agent workflows without subscription overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T12:48:10.816Z","isFirstParty":false,"canonicalSlug":"b2a-email-deliverability-mx-spf-dmarc-verifier-aed51451"}