{"uid":"cap_a79BMFiXZxH5NdfQEIobU","slug":"d21-email-validate-6fdb6a10","name":"d21 Email Validate","description":"Email Validate ($0.006): syntax + live MX/A-fallback deliverability + disposable-domain + role-address + free-webmail-provider + SPF/DMARC, with no third-party validation vendor at all -- syntax is RFC 5321/5322 grammar, MX/A/SPF/DMARC are live DNS via this server's own resolver (the same protocol-level sourcing as domain_intel), and disposable-domain detection is a static self-maintained list. Never opens an SMTP connection to the mailbox or confirms one specific inbox exists. Body { email }…","url":"https://draconic21-x402-api.onrender.com/v1/email_validate?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"email":{"type":"string","description":"Email address to validate, e.g. 'info@example.com'."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.006","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":"$0.006/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.006","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.006","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_-oTPgRXfLw5abCl67z5Z3","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.006","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 for syntax, live DNS-based deliverability (MX/A-fallback), disposable domain detection, role-address detection, free webmail provider detection, and SPF/DMARC presence — all without any third-party validation vendor or SMTP probing.","exampleAgentPrompt":"Can you check whether 'info@acmecorp.io' is a real, deliverable email — flag if it's disposable, a role address, or a free webmail domain, and tell me if the domain has SPF and DMARC set up?","exampleUseCases":[{"title":"Lead form email hygiene check","prompt":"Before we add this signup to our CRM, can you validate 'john.smith@tempmail.org' — is it syntactically valid, does the domain have MX records, and is it a known disposable email provider?"},{"title":"B2B outreach deliverability screening","prompt":"I'm about to send a cold email campaign — can you check 'ceo@startupxyz.com' to confirm the domain has active MX records and SPF/DMARC configured, and tell me if it looks like a role address?"},{"title":"User registration fraud detection","prompt":"A new user just signed up with 'noreply@guerrillamail.com' — can you tell me if that's a disposable domain, a role-based address, or a free webmail provider so I can decide whether to block the registration?"}],"resultDescription":"Returns structured results covering: RFC 5321/5322 syntax validity, live DNS MX/A-fallback deliverability status, whether the domain is on a self-maintained disposable-domain blocklist, whether the local part is a role address (e.g. info@, support@), whether the domain is a known free webmail provider, and whether the domain has SPF and DMARC DNS records — all resolved via the server's own DNS resolver with no third-party vendor and no SMTP probing.","failureModes":["Malformed or missing email field returns a validation/syntax error","DNS resolution timeout if the domain's DNS is slow or unresponsive","Domain not found in DNS returns a non-deliverable status but is not an API error","Does not confirm whether a specific inbox exists — only domain-level deliverability","Disposable domain list is static and may not include very new throwaway services","Free webmail and disposable lists depend on freshness of self-maintained data"],"whenToPreferThis":"Choose this endpoint when you need fast, self-contained email validation that covers syntax, DNS deliverability, disposable/role/webmail classification, and SPF/DMARC — all without relying on a third-party validation vendor or opening SMTP connections. Prefer it over SMTP-probing services when you want privacy-safe validation that won't trigger remote mail servers. Ideal for pre-send list hygiene, registration fraud screening, or lead qualification pipelines where you want deterministic, auditable DNS-based signals at low cost ($0.006/call).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:38:21.402Z","isFirstParty":false,"canonicalSlug":"d21-email-validate-6fdb6a10"}