{"uid":"cap_OoTDB_tfelkkaJzYdCtu-","slug":"freetier-agent-api-email-domain-verification-a28948d0","name":"FreeTier Agent API — Email Domain Verification","description":"Pay-per-call data API for AI agents: AI model prices and cost calculator, 4,259 MCP servers, email domain checks, text-to-JSON extraction, country/holiday/currency lookup, page and link checks, page-to-markdown, 2,230 verified APIs. x402, USDC on Base, no signup. Sources cited in every response.","url":"https://freetier-agent-api.pages.dev/api/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"],"type":"string"},"queryParams":{"type":"object","required":["email"],"properties":{"email":{"type":"string","description":"one email address"}}}}},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"role":false,"email":"jane.doe@example.com","domain":"example.com","has_mx":false,"reasons":["no MX records"],"verdict":"risky","free_mail":false,"syntax_ok":true,"disposable":false}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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"}]},"paymentMethods":[{"uid":"pm_5imhsFmt5Z8nPcIZsXOTs","protocol":"x402","methodType":"crypto","chain":"base","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":"Checks an email address for syntax validity, MX records, disposable domain status, free-mail provider status, and overall deliverability risk","exampleAgentPrompt":"Can you check whether jane.doe@example.com is a real, deliverable email address — specifically whether the domain has MX records, if it's disposable or a free-mail provider, and what the overall risk verdict is?","exampleUseCases":[{"title":"Sign-up fraud screening","prompt":"Before we create an account for this new user, can you verify that their email address user123@mailnull.com is legitimate — check if it's disposable, has valid MX records, and isn't a throwaway domain?"},{"title":"Mailing list quality check","prompt":"I have a lead who gave us the email contact@somebusiness.co — can you tell me if that domain actually has mail servers set up, whether it's a free or role-based address, and whether it's safe to add to our campaign list?"},{"title":"Detecting free-mail vs business email","prompt":"Can you check whether the email john.smith@gmail.com is from a free mail provider and whether it passes syntax and MX validation, so I can decide whether to route them as a consumer or business lead?"}],"resultDescription":"A JSON object containing: the normalized email and domain, a boolean for syntax validity, a boolean for MX record presence, a boolean for disposable domain, a boolean for free-mail provider, a boolean for role address (e.g. info@, support@), a verdict string (e.g. 'risky', 'safe'), and an array of human-readable reasons explaining the verdict.","failureModes":["Missing or malformed email query parameter returns an error","Email with valid syntax but unresolvable domain returns has_mx:false and risky verdict","Network or DNS lookup timeout may cause delayed or failed response","Newly registered domains may not yet have MX records leading to false risky verdict","Catch-all mail servers may cause MX checks to pass even for non-existent mailboxes"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, pay-per-call email risk assessment without a subscription — particularly useful for agents doing real-time sign-up validation, lead qualification, or mailing list hygiene. It combines syntax, MX, disposable, free-mail, and role-address checks in a single call, with no API key or account required, billed at $0.005 USDC via x402 on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T12:42:32.233Z","isFirstParty":false,"canonicalSlug":"freetier-agent-api-email-domain-verification-a28948d0"}