{"uid":"cap_7mwDcrXGjcyUk93jAsLCB","slug":"fiber-ai-api-fiber-ai-email-bounce-validator-0e862b77","name":"Fiber AI Email Bounce Validator","description":"Checks if a given email is likely to bounce using a waterfall of strategies. Works for catch-all email addresses, which are increasingly common yet hard for other APIs to validate.","url":"https://mpp.orthogonal.com/fiber/v1/validate-email/single?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":{"request":{"email":"test.user@example.com"},"response":{"output":{"email":"test.user@example.com","verdict":"undeliverable","is_consumer":false,"is_catch_all":false,"is_disposable":false,"is_role_based":false,"email_provider":"","deliverability_score":0},"chargeInfo":{"method":"charged-now","creditsCharged":1}}},"exampleRequest":{"email":"test.user@example.com"},"tags":["contacts","email","phone","enrichment","data"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.02/call","primary":{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_1fy_CMfOofYpSzi6YP6wE","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":"Fiber AI API","brandSlug":"fiber-ai-api-mpp","brandBaseUrl":"https://api.fiber.ai","brandDocsUrl":"https://api.fiber.ai","whatItDoes":"Checks if a single email address is likely to bounce using a waterfall of validation strategies, including catch-all detection","exampleAgentPrompt":"Before I send my outreach email, can you check whether john.smith@acmecorp.com is likely to bounce — I want to know if it's a catch-all or just invalid?","exampleUseCases":null,"resultDescription":"Returns a bounce likelihood assessment for the given email address, including whether it is a catch-all address, likely invalid, or safe to send to, derived from a multi-strategy waterfall validation process.","failureModes":["Invalid or malformed email address input — returns validation error","Email domain does not exist — returns domain-level bounce signal","Timeout or unreachable mail server — may return inconclusive result","Catch-all domain detected but individual address unverifiable — returns catch-all flag","Rate limit exceeded — returns 429 error"],"whenToPreferThis":"Choose this endpoint when you need to validate a single email address before outreach, especially when dealing with catch-all domains where standard SMTP checks fail. It is ideal for pre-screening individual contacts in a sales or marketing workflow to reduce bounce rates. Prefer it over generic SMTP checkers when catch-all handling and high accuracy are critical.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T12:39:16.911Z","isFirstParty":false,"canonicalSlug":"fiber-ai-api-fiber-ai-email-bounce-validator-0e862b77"}