mailboxlayer is an apilayer-owned REST JSON API for email address verification. It performs syntax and typo checks, MX-record lookup, real-time SMTP verification, catch-all detection, role-address detection, free and disposable provider detection, and returns a numeric deliverability quality score. Useful for signup-form validation, list hygiene, lead enrichment, and fraud prevention.
APIs.json: https://mailboxlayer.com
- Email Verification
- Email Validation
- SMTP
- MX Records
- Catch-All Detection
- Disposable Email
- Free Email Provider
- Role Address
- Quality Score
- apilayer
- Public APIs
- Created: 2026-05-28
- Modified: 2026-05-30
REST JSON API for verifying a single email address. Performs syntax validation, MX-record lookup, real-time SMTP check, catch-all detection, role-address detection, free / disposable provider detection, did-you-mean suggestion, and a 0.0 - 1.0 deliverability quality score.
- Human URL: https://mailboxlayer.com
- Base URL:
https://apilayer.net/api
- Email Verification
- SMTP
- MX Records
- Quality Score
- Documentation
- API Reference
- Quickstart
- Authentication
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
- JSON Schema — JSON Schema
- JSON Schema — JSON Schema
- JSON Structure
- J S O N- L D
- Example
- Example
- Example
- Example
- Example
- Example
- Rate Limits
- Website
- Portal
- Sign Up
- Pricing
- Getting Started
- Terms of Service
- Privacy Policy
- Support
- GitHub Organization
- GitHub Repository
- SDK
- SDK
- SDK
- SDK
- Integrations
- Integrations
- Spectral Rules
- Vocabulary
- Public APIs Listing
- Plans
- Rate Limits
- Fin Ops
- Features
- Use Cases
- Integrations
- Solutions
FN: Kin Lane Email: kin@apievangelist.com