{"uid":"cap_UignAPJw1qJAThGinaIQy","slug":"fittings-email-deliverability-validator-a8ae47d5","name":"fittings Email Deliverability Validator","description":"RFC 5322 syntax check, live MX resolution and a disposable-provider check for one email address, in a single call.","url":"https://fittings.sh/v1/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"],"type":"string"},"queryParams":{"type":"object","required":["email"],"properties":{"email":{"type":"string","description":"Up to 320 characters"}}}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_JbW3kr1uFEmp_mNvQjGE9","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates a single email address by checking RFC 5322 syntax, resolving live MX records, and flagging disposable/temporary email providers in one call.","exampleAgentPrompt":"Can you check whether john.doe@tempmail.io is a real, deliverable email address — specifically verify the syntax is correct, that the domain has working mail servers, and whether it's from a disposable email provider?","exampleUseCases":[{"title":"User registration email screening","prompt":"Before we create this account, check if the email submitted — signup@guerrillamail.com — is valid, has working MX records, and whether it's a throwaway address we should block."},{"title":"Pre-send list hygiene check","prompt":"I'm about to send a campaign — can you verify that newsletter@acme-corp.com is syntactically correct, that acme-corp.com can actually receive email, and that it's not a disposable domain?"},{"title":"Lead qualification email check","prompt":"A sales lead came in with the email bob.smith@yopmail.fr — validate whether it's properly formatted, whether the mail servers are live, and flag it if it's a disposable provider."}],"resultDescription":"Returns a structured result indicating whether the email passes RFC 5322 syntax validation, whether live MX records were found for the domain via DNS resolution, and whether the domain belongs to a known disposable or temporary email provider.","failureModes":["Email address exceeds 320 characters — request rejected","Malformed input with no email query parameter — validation error returned","DNS resolution timeout for obscure or newly-registered domains — MX check may be inconclusive","Disposable provider list may not cover very new or niche throwaway services","Valid syntax with no MX records returns deliverable: false but does not indicate a typo"],"whenToPreferThis":"Choose this endpoint when you need a single-call, three-in-one email check combining syntax validation, live DNS MX resolution, and disposable-provider detection — ideal for real-time user registration flows, lead qualification, or pre-send list hygiene where speed and cost matter. Prefer it over heavier email verification services when you don't need SMTP handshake verification or full inbox existence checks.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:45:35.310Z","isFirstParty":false,"canonicalSlug":"fittings-email-deliverability-validator-a8ae47d5"}