What are the best Email APIs? (2026)

Validate email addresses for deliverability and spam

This API allows you to verify whether an email belongs to a recognized educational institution

Validate email addresses, phone numbers, VAT numbers and domain names

<p>Make use of our in-depth documentation to get more information about the various functions of the service. Those willing to explore the mechanics of Data2CRM.API can test it in live regime using...

Validate and detect disposable and temporary email addresses

GraphQL API for creating and managing ephemeral e-mail inboxes

E-Mail address validation

Validate email addresses

Fungenerators API gives access to the full set of generators available at fungenerators.com so that you can integrate them in your workflow or an app. [Click here to get details and subscribe](http...

Disposable temporary Email addresses

Email Verification API

API for free email forwarding service

Everything email for your startup with markdown support

Email verification API

## Welcome! The License Manager API allows you to create users, modify their names and emails, as well as add and remove roles from users. ### ATTRIBUTES |Attribute name | Description | |...

10 Minute Mail

Temporary Email Service

Email address validation

Validate email address to improve deliverability

The MailboxValidator Disposable Email Checker API checks if a single email address is from a disposable email provider and returns the results in either JSON or XML format. Refer to https://www.mai...

The Single Validation API does validation on a single email address and returns all the validation results in either JSON or XML format. Refer to https://www.mailboxvalidator.com for further inform...

The MailboxValidator Free Email Checker checks if a single email address is from a free email provider and returns the results in either JSON or XML format. Refer to https://www.mailboxvalidator.co...

Prevent users to sign up with temporary email addresses

A service for the safe testing of emails sent from the development and staging environments

Email validation API for real-time & bulk checking

A seamless messaging platform & API to send all types of SMS

Validate email addresses without sending

Email API for developers

A cloud-based SMTP provider that allows you to send emails without having to maintain email servers

A service that provides solutions relating to marketing and/or transactional email and/or SMS

ShipEngine's easy-to-use REST API lets you manage all of your shipping needs without worrying about the complexities of different carrier APIs and protocols. We handle all the heavy lifting so you ...

Self-serve multichannel notification platform for transactional email, SMS, push web& mobile, chat, in-app

Reliable email validation API with Free tier

This API provides temporary & disposable email addresses

Trueguard offers API for detecting temporary emails, free-tier abusers and automated bots

Verifies that a given email is real

This API provides cacheable and straightforward access to Wikimedia content and data, in machine-readable formats. ### Global Rules - Limit your clients to no more than 200 requests/s to this API. ...

Unlimited e-mail inboxes with API access. Catch OTPs, reset links, and sign-up emails in test flows