{"uid":"cap_0EbAyI66_fmnQ5LHwvJ-j","slug":"email-deliverability-check-6701c630","name":"Email Deliverability Check","description":"Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.","url":"https://anibalb.duckdns.org/x402/email-deliverability?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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"mx":true,"valid":true,"disposable":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_hfJ1kA6cXzN1d-AVLgJy6","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether an email address or domain is deliverable by validating MX records, address format, and disposable/temporary email status","exampleAgentPrompt":"Can you check if the email address john.doe@example.com is actually deliverable — does it have valid MX records, is it a real address format, and is it from a disposable email provider?","exampleUseCases":[{"title":"Screen sign-up emails for fake accounts","prompt":"Before we accept this new user registration, can you check if the email they signed up with — tempuser@mailinator.com — is valid, has MX records, and is from a disposable email service?"},{"title":"Validate leads before email outreach","prompt":"I have a lead with the email contact@acmecorp.io — can you verify it's deliverable and not a throwaway address before we add it to our outreach campaign?"},{"title":"Debug why emails are bouncing","prompt":"We're getting bounces from orders@shopexample.net — can you check if that domain even has MX records set up and whether the email address is structurally valid?"}],"resultDescription":"Returns a JSON object with three boolean fields: 'mx' indicating whether the domain has valid MX records, 'valid' indicating whether the email address format is valid, and 'disposable' indicating whether the email comes from a known disposable/temporary email provider.","failureModes":["Missing or malformed email/domain input may return an error or empty result","Unknown or newly created disposable domains may not be flagged as disposable","DNS lookup failures may cause mx field to return false even for valid domains","Rate limits or network timeouts may result in failed payment with no response","Private or internal domains may return false negatives for MX checks"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, pay-per-call email deliverability check with no account setup required. Ideal for agents that need to validate user-submitted emails at sign-up, screen leads before outreach, or detect throwaway addresses — especially in workflows where sporadic, low-volume checks make a subscription service impractical. Best suited for quick boolean-flag checks rather than deep SMTP handshake verification.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:38:53.190Z","isFirstParty":false,"canonicalSlug":"email-deliverability-check-6701c630"}