{"uid":"cap_UKSPxnNgROuXVkWqHPEvT","slug":"stride20k-email-validation-e2400b22","name":"Stride20k Email Validation","description":"Agent data gateway plus the live x402 market feed. Normalized, schema-stable JSON for crypto prices, DeFi TVL, on-chain DEX pools, gas, FX, US Treasury yields, US weather, WHOIS, DNS, email validation, web-page extraction, tech news, Wikipedia, npm/PyPI package health, ERC-20 token-risk scoring, and composed domain dossiers, plus x402 ecosystem analytics and metered LLM inference. Pay per call with USDC via the x402 protocol; no accounts, no API keys.","url":"https://gateway.stride20k.com/email/validate/%7Bemail%7D","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"ok":true,"data":{"mx":[{"exchange":"mail.example.com","preference":10}],"email":"postmaster@example.com","hasMx":true,"domain":"example.com","aFallback":false,"deliverable":true,"syntaxValid":true},"meta":{"cached":false,"source":"local + Cloudflare DoH","fetchedAt":"2026-07-04T00:00:00.000Z","attribution":null},"endpoint":"/email/validate/:email"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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_5fVsVFUlzmByfYF6Frzmb","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":"Validates an email address by checking RFC syntax and performing live MX-record DNS lookup to determine deliverability","exampleAgentPrompt":"Can you check whether hello@acme.io is a valid, deliverable email address — verify the syntax and look up its MX records?","exampleUseCases":[{"title":"Pre-send email deliverability check","prompt":"Before I send this campaign, check whether support@newsletters.example.com is actually deliverable — does the domain have proper mail servers set up?"},{"title":"User signup email verification","prompt":"A new user just submitted j.doe@fastmail.fm during signup — can you confirm it's syntactically valid and that the domain can actually receive mail?"},{"title":"Lead list email hygiene","prompt":"I have a lead email address info@startup.io — validate it for me and tell me whether it has MX records and is likely to accept mail."}],"resultDescription":"Returns a JSON object containing: whether the email syntax is valid (syntaxValid), whether MX records exist (hasMx), an array of MX records with exchange hostname and preference values, whether an A-record fallback applies (aFallback), whether the address appears deliverable (deliverable), the parsed domain, the original email, and metadata including cache status, data source, and fetch timestamp.","failureModes":["Malformed or missing email parameter returns error","Domain with no MX or A records returns hasMx:false and deliverable:false","DNS resolution timeout from Cloudflare DoH yields fetch error","Syntactically invalid email short-circuits before DNS lookup","Cached results may not reflect very recent DNS changes (meta.cached:true)"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, pay-per-call email validation with both RFC syntax checking and live DNS MX-record resolution in a single call, with no API key or account setup. Prefer it over heavyweight email verification services when you want schema-stable JSON output and per-call USDC micropayment billing via x402. Best for agents that need on-demand validation of individual email addresses during onboarding flows, lead enrichment, or pre-send hygiene checks.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:40:04.804Z","isFirstParty":false}