{"uid":"cap_2shtolIDQ8JPsleiDPtVz","slug":"one-engine-email-syntax-validator-508d8bc0","name":"ONE Engine Email Syntax Validator","description":"Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.","url":"https://one-search.one-engine.workers.dev/v1/email/syntax?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"email":{"type":"string"}}},"responseSchema":{"type":"json","example":{"valid":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0009","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":"$0.0009/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0009","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0009","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_z8HgbPrqF0Yp9tcdaYGAj","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0009","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates whether an email address string is syntactically well-formed","exampleAgentPrompt":"Can you check if 'john.doe@example.com' is a syntactically valid email address before I try to use it?","exampleUseCases":[{"title":"Form input validation before submission","prompt":"Before I store this user's profile, can you check if the email they entered — 'user@domain' — is actually a valid email format?"},{"title":"Screening scraped contact data","prompt":"I scraped a list of email addresses from a webpage and got 'notanemail@@broken' — can you verify whether that's a properly formatted email address?"},{"title":"Pre-send email validation in agent workflow","prompt":"I'm about to send an automated message to 'support@.missingdomain.com' — can you validate whether that email address is syntactically correct first?"}],"resultDescription":"A JSON object with a single boolean field 'valid' indicating whether the submitted email string conforms to standard email syntax rules. Returns {valid: true} for well-formed addresses and {valid: false} for malformed ones.","failureModes":["Missing or empty email field in request body — likely returns an error or false","Non-string input type for email field may cause parsing errors","Payment failure via x402 if wallet lacks sufficient USDC on Base","Network timeout if Cloudflare Workers instance is cold or overloaded","Only checks syntax, not deliverability — a valid response does not mean the mailbox exists"],"whenToPreferThis":"Choose this endpoint when you need a fast, cheap, stateless syntax check on an email string with no side effects — ideal for agent pipelines that need to filter or validate user-supplied or scraped email addresses before passing them downstream. At $0.0009 USDC per call it is cost-effective for high-volume validation loops. Prefer a deliverability or MX-check service instead if you need to confirm the mailbox actually exists and can receive mail.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T12:44:28.109Z","isFirstParty":false,"canonicalSlug":"one-engine-email-syntax-validator-508d8bc0"}