The mailfloss email verification API allows you to add email verification to any part of your software, ideal for signup, registration, onboarding, and other points of entry.

You will need an API key and an account with mailfloss to use the API. The API key can be generated inside of the mailfloss dashboard.

The API is not suitable for use in client-side scripts (e.g. React, Angular, Vue, jQuery, and other Javascript frameworks) because our verification endpoints do not allow cross-domain requests. Using it directly in the browser would require exposing sensitive API credentials giving anyone access to your account. Please make all requests server-side.

Make API calls on the server-side only

API Overview

Authentication

mailfloss

mailfloss API & Webhooks

Rate Limits

Response Headers

Response Codes

Reference

Code Examples

Email Verification API

Webhooks Overview

Retries and Errors

Managing Webhooks

Verifying Webhooks

Event Triggers

Webhooks