{"uid":"cap_rzPFeJiHBw7pu_KOeLDkl","slug":"pennyrail-email-validation-80caf37b","name":"PennyRail Email Validation","description":"Machine-readable settlement service","url":"https://pennyrail.vercel.app/api/f/validation.email","method":"POST","headers":{},"bodySchema":{"type":"object","required":["input"],"properties":{"input":{"type":"string","description":"string"}}},"responseSchema":{"type":"object","required":["operation","result"],"properties":{"result":{},"operation":{"type":"string"}},"additionalProperties":true},"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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_shg1ASwpfQdHX-mR4mVCU","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates whether a given string is a properly formatted email address","exampleAgentPrompt":"Can you check whether 'john.doe@example.com' is a valid email address format before I store it in the database?","exampleUseCases":[{"title":"Form submission email gating","prompt":"Before I save this new user registration, can you check if 'sarah_jones@mycompany.org' is a properly formatted email address?"},{"title":"Bulk onboarding data cleanup","prompt":"I have an email string 'not-an-email@@broken' from an import — can you tell me if that's actually a valid email format?"},{"title":"API input sanitization","prompt":"Can you validate whether 'user+tag@sub.domain.co.uk' is a correctly formatted email before I pass it downstream to our mailing service?"}],"resultDescription":"Returns a JSON object with an 'operation' field (string identifying the validation operation performed) and a 'result' field (indicating whether the input string is a valid email address, likely a boolean or status indicator), plus any additional metadata fields.","failureModes":["Missing 'input' field in request body returns validation error","Empty string input may return invalid result or error","Malformed JSON body causes request rejection","Network timeout on Vercel cold start","Ambiguous result schema — 'result' field type is not strictly typed, so boolean vs string interpretation may vary"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, pay-per-call ($0.001 USDC) email format validation with no setup or API key required, particularly in agent workflows using x402 micropayment protocol. Best for single-string validation in automated pipelines where you want a machine-readable settlement service rather than a full identity verification or email deliverability check.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T07:21:56.703Z","isFirstParty":false}