{"uid":"cap_jbzfBIt-Ues2iqDYWuRxJ","slug":"email-verifier-validator-95fafc00","name":"Email Verifier & Validator","description":"Takes one email address and tells you whether it can actually receive mail. Returns a verdict of valid, invalid, or risky, splits the address into username and domain, and flags free providers and role accounts like admin@ or support@. One address per call.","url":"https://email-verifier.underscoredone.com/verify","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"email":{"type":"string","description":"The single email address to check, such as alpha@gmail.com. Maximum 320 characters."}}},"responseSchema":{"type":"json","example":{"api_version":"1.0.0"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_VlhJb1RqBJlv1sZZvrq0l","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies whether a single email address can actually receive mail and returns a valid/invalid/risky verdict with metadata about the address.","exampleAgentPrompt":"Can you check whether john.doe@company.com can actually receive emails — I want to know if it's valid, risky, or invalid, and whether it's a free provider or a role address?","exampleUseCases":[{"title":"Pre-send email list hygiene","prompt":"Before I blast this campaign, check if sarah.johnson@acmecorp.com is a real deliverable address or if it's going to bounce — also flag it if it's a generic role account."},{"title":"Signup form validation","prompt":"A user just entered contact@freelancer.io on our registration form — verify whether that email can actually receive mail and whether we should flag it as a role-based address before we let them sign up."},{"title":"CRM lead quality check","prompt":"I've got a lead with the email info@potentialclient.com — can you tell me if it's valid, risky, or invalid, and let me know if it's a role address or free provider so I can prioritize it?"}],"resultDescription":"Returns a JSON object with an overall verdict (valid, invalid, or risky), the email split into username and domain parts, a flag indicating whether the domain belongs to a free email provider (e.g. Gmail, Yahoo), and a flag indicating whether the address is a role account (e.g. admin@, support@, info@).","failureModes":["Email address exceeds 320 characters — request rejected","Malformed or non-string email input — validation error returned","Unresolvable or nonexistent domain — may return invalid verdict","Temporary DNS or SMTP timeout — may return risky or error response","Payment not included or insufficient — 402 Payment Required response"],"whenToPreferThis":"Choose this endpoint when you need a single-address, real-time deliverability verdict with enrichment metadata (free provider and role account flags) in one call. Ideal for pre-send list hygiene, signup form validation, or CRM lead enrichment where you need more than just syntax checking. Not suited for bulk batch processing of large lists in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:34:44.174Z","isFirstParty":false}