{"uid":"cap__a5GO-NwylaOdfjAwLdPY","slug":"rotary-agency-mail-check-api-27256d20","name":"Rotary Agency Mail Check API","description":"Free-source data APIs (100% margin, no proxy, $0.002/call): ...","url":"https://rotaryagency.uk/api/free/mailcheck?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"varies":"endpoint-specific structured JSON"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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_NRLA5jnP_ah5yvDO2cfj2","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":"Validates an email address and checks its deliverability, domain validity, and mailbox existence","exampleAgentPrompt":"Can you check whether the email address john.doe@example.com is valid and actually deliverable before I add it to my mailing list?","exampleUseCases":[{"title":"Signup form email gating","prompt":"Before creating an account for this new user, check if their email address sarah.jones@gmail.com is real and deliverable — I don't want fake signups getting through."},{"title":"Bulk lead list scrubbing","prompt":"I've got a lead I want to follow up with at mike.smith@somestartup.io — can you verify that email is valid and the domain actually accepts mail before I reach out?"},{"title":"Detecting disposable emails","prompt":"A user just registered with temp-inbox@mailinator.com — can you check if that's a throwaway disposable email address I should reject?"}],"resultDescription":"Returns a structured JSON object indicating whether the email address is valid, whether the domain has active MX records, whether the mailbox likely exists, whether the address is from a known disposable email provider, and an overall deliverability verdict.","failureModes":["Missing or malformed email parameter returns an error response","Domain with no MX records flagged as undeliverable","Temporary DNS failures may cause false negatives on domain checks","Private or protected mailboxes may not confirm existence even if valid","Rate limiting or payment failure results in HTTP 402 response"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, pay-per-call email validation check without committing to a monthly subscription service. Well-suited for agents that validate individual emails on-demand during signups, lead enrichment, or outreach workflows. At $0.002 per call it is cost-effective for low-to-moderate volume checks where disposable email detection and MX record validation are sufficient.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-16T00:50:14.974Z","isFirstParty":false,"canonicalSlug":"rotary-agency-mail-check-api-27256d20"}