mailboxlayer

mailboxlayer.com

REST API that validates and verifies email addresses in real time, returning syntax, MX-record, SMTP, disposable/free provider checks and a quality score in JSON.

The mailboxlayer API uses api key authentication; has freemium pricing; offers a free tier (Free Plan: 100 API requests/month (homepage also states 1,000 monthly requests for free)). Verified 2026-07-08 with per-field source links.

Communication Verified 2026-07-08 medium confidence

Base URL

https://apilayer.net/api/

mailboxlayer.com ↗

Auth

api_key

mailboxlayer.com ↗

Free tier

Free Plan: 100 API requests/month (homepage also states 1,000 monthly requests for free)

mailboxlayer.com ↗

Pricing model

freemium

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Pricing

Free $0 (100 requests); Basic $14.99/mo (5,000 requests); Professional Plus $74.99/mo (50,000 requests); Enterprise Plus $249.99/mo (250,000 requests); Custom Enterprise pricing; yearly billing saves up to 15%; overage fees apply

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Rate limits

not documented null

no source

OpenAPI spec

not documented null

no source

MCP server

not documented null

no source