{"uid":"cap_9MIdneIXgnut7a7UTLnyu","slug":"polyform-email-domain-check-59fd1659","name":"Polyform Email Domain Check","description":"Pay-per-call data endpoints for AI agents. USDC on Base via x402. No account, no API key — one micropayment per call.","url":"https://api.polyform.org/v1/email/domain-check","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","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"mx":["gmail-smtp-in.l.google.com"],"spf":true,"dmarc":"reject","domain":"gmail.com","canReceive":true}},"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_rJOSoKJZ0TMmHkKzetZmW","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":"Checks whether an email domain can receive mail by looking up its MX records, SPF record, and DMARC policy","exampleAgentPrompt":"Can you check whether the domain acme.com is set up to receive email — I want to know its MX records, whether it has SPF and DMARC configured, and if it can actually receive messages?","exampleUseCases":[{"title":"Validate lead email domains before outreach","prompt":"Before we send our campaign, check whether contoso.com can actually receive email and has DMARC configured — I don't want to waste sends on broken domains."},{"title":"Screen user-submitted email domains on signup","prompt":"A new user just signed up with a @privatecorp.io address — can you verify that domain has MX records and is capable of receiving mail before we send the confirmation email?"},{"title":"Audit supplier contact email infrastructure","prompt":"I'm onboarding a new vendor at vendor-partner.net — can you look up their email domain to confirm they have MX records, SPF, and DMARC set up so I know their email is legit?"}],"resultDescription":"Returns a JSON object with: the domain name, an array of MX record hostnames, a boolean SPF field indicating whether SPF is configured, a DMARC field with the DMARC policy string (e.g. 'reject', 'quarantine', 'none'), and a canReceive boolean indicating whether the domain is configured to receive email.","failureModes":["Domain does not exist or has no DNS records — may return canReceive: false with empty MX array","Transient DNS lookup failure — may return an error or partial result","Malformed domain input — likely returns a 4xx error","DMARC record absent — dmarc field may be null or 'none'","SPF record missing — spf field returns false"],"whenToPreferThis":"Choose this endpoint when you need a quick, no-account pay-per-call DNS/email validation check for a single domain — especially in agent workflows that need to verify email deliverability, enrich contact data, or screen domains before sending. Prefer this over full email verification APIs when you only need domain-level checks (not mailbox-level existence) and want to avoid API key setup overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:34:45.221Z","isFirstParty":false}