{"uid":"cap_25dnvR33pir-5WP4xifYO","slug":"prompt-guard-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-f0765224","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://prompt-guard.agentdiet.dev/v1/email)","url":"https://prompt-guard.agentdiet.dev/v1/email?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_cDlLOlbpZ-ZlROa8m83zg","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"prompt-guard.agentdiet.dev","brandSlug":"prompt-guard-agentdiet-dev-mpp","brandBaseUrl":"https://prompt-guard.agentdiet.dev","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@examplecorp.com is a real, deliverable email address — verify its syntax, check if the domain has MX records, and flag it if it's a disposable or role-based address?","exampleUseCases":[{"title":"Signup fraud prevention screening","prompt":"Before creating this account, check whether the email address they signed up with — tempuser@mailinator.com — is a disposable burner address or a real deliverable inbox."},{"title":"B2B lead list hygiene","prompt":"I have a lead from our CRM with email contact@acmecorp.io — can you verify it's syntactically valid, not a generic role address, and that acmecorp.io actually has MX records set up so emails won't bounce?"},{"title":"Email domain security audit","prompt":"Check whether the domain on this vendor's email address — billing@globalpartners.net — has SPF and DMARC records properly configured so I know it's not spoofable."}],"resultDescription":"Returns a structured object indicating: whether the email syntax is valid, whether the domain is from a known disposable/burner provider, whether it is a role account (e.g. info@, admin@, noreply@), and the live DNS lookup results for MX, SPF, and DMARC records — giving a comprehensive deliverability and authenticity picture for the address.","failureModes":["Missing or empty email parameter returns a 400 error","Malformed email string may return syntax-invalid without DNS checks","DNS timeout or unreachable authoritative nameserver may result in incomplete MX/SPF/DMARC results","Payment not received (HTTP 402) if x402 micropayment is not completed","Very new or obscure domains may not be in disposable provider lists yet, leading to false negatives","Rate limiting if called too frequently without proper payment flow"],"whenToPreferThis":"Choose this endpoint when you need a comprehensive, multi-signal email validation that combines syntax checking, disposable/burner detection, role-account identification, and live DNS record lookups (MX, SPF, DMARC) in a single call. It is especially well-suited for AI agent workflows that need to verify email quality before outreach, onboarding, or lead enrichment, particularly in B2B or fraud-sensitive contexts. Prefer it over simple regex-based validators when you need live DNS confirmation of deliverability, or over domain-only tools when you need the full email address validated end-to-end.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:21:46.753Z","isFirstParty":false,"canonicalSlug":"prompt-guard-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-f0765224"}