{"uid":"cap_bohjkBi8M18a7ooG24Uk4","slug":"email-domain-deliverability-check-mx-spf-dmarc-provider-disposable-flag-e728eac8","name":"Email & Domain Deliverability Check (MX, SPF, DMARC, Provider, Disposable Flag)","description":"Email/domain deliverability check: MX, provider, SPF, DMARC policy, disposable flag — Genesis402 / UnyKorn Operator Network","url":"https://twin.unykorn.org/web/email-check?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"params":{"type":"object","properties":{"email_or_domain":{"type":"string","description":"required: user@domain.com or domain.com"}}}}},"responseSchema":{"type":"json","example":{"ok":true,"type":"email-domain-check","receipt":{"tx_hash":"0x<64hex>","amount_usd":0.002,"receipt_id":"g402-<16hex>"},"sources":[{"ok":true,"name":"<source>"}],"limitations":"<text>","generated_at":"<iso time>","evidence_hash":"sha256:<64hex>"}},"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_z6w25gIFhkq3sUFGPjElq","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 an email address or domain for deliverability signals including MX records, email provider, SPF policy, DMARC policy, and whether the domain is disposable/temporary.","exampleAgentPrompt":"Can you check whether user@example.com is a real, deliverable email address — I want to know if the domain has MX records, what email provider they use, whether SPF and DMARC are configured, and if it looks like a disposable/throwaway address?","exampleUseCases":[{"title":"Pre-send email list validation","prompt":"Before I send my newsletter campaign, check john.doe@mailinator.com for me — I need to know if it's deliverable, whether it's a disposable address, and if the domain has MX records set up."},{"title":"Onboarding signup fraud detection","prompt":"A user just signed up with the email 'quickemail@guerrillamail.com' — can you check if this is a throwaway disposable address and whether the domain has valid MX and DMARC policies?"},{"title":"Sales lead email qualification","prompt":"I have a lead with the domain 'prospectcorp.io' — can you check if they have MX records, what mail provider they're on, and whether they have SPF and DMARC configured so I know their email is legitimate before I reach out?"}],"resultDescription":"Returns a structured report for the queried email or domain including: MX record presence and details, identified email provider (e.g. Google Workspace, Microsoft 365), SPF record policy, DMARC policy configuration, and a boolean flag indicating whether the domain is a known disposable/temporary email provider.","failureModes":["Invalid or malformed email/domain input returns an error","Non-existent domain with no DNS records may return empty MX/SPF/DMARC fields","Rate limiting or payment failures result in HTTP 402 response","Newly registered domains may have incomplete or missing DNS records","Some privacy-protected domains may obscure provider identification"],"whenToPreferThis":"Use this endpoint when you need a quick, multi-signal deliverability and authentication check for an email address or domain in a single call — covering MX, SPF, DMARC, provider identification, and disposable detection simultaneously. Prefer this over manual DNS lookups or single-purpose validators when you need a comprehensive picture of email infrastructure quality, especially for fraud detection, lead qualification, or pre-send list hygiene.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T18:52:42.731Z","isFirstParty":false,"canonicalSlug":"email-domain-deliverability-check-mx-spf-dmarc-provider-disposable-flag-e728eac8"}