Resend API

API keyHTTPSCORSEmail

Overview

Email API for developers

Resend is an email API. Requests are authenticated with an API key. It is served over HTTPS and allows browser requests (CORS).

At a glance

Authentication: API key
HTTPS: Yes
CORS: Yes
Category: Email

Questions

Does the Resend API need an API key?

Yes. The Resend API uses API key authentication; the documentation explains how to get credentials.

Can I call the Resend API from the browser?

Yes. The Resend API sends CORS headers, so a web page can call it directly with fetch().

Does the Resend API support HTTPS?

Yes, the Resend API is served over HTTPS.

What are alternatives to the Resend API?

Other Email APIs include Sendgrid, Sendinblue, mail.tm, Mandrill, Guerrilla Mail.

Compare alternatives →

Sendgrid

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

API key334 endpoints

Sendinblue

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

API keyCORS

mail.tm

Temporary Email Service

No authCORS

Mandrill

Mandrill is a reliable, scalable, and secure delivery API for transactional emails from websites and applications. It's ideal for sending data-driven transactional emails, including targeted e-commerce and personalized one-to-one messages.

No auth90 endpoints

Guerrilla Mail

Disposable temporary Email addresses

No auth

Postmark Account-level API

Postmark makes sending and receiving email incredibly easy. The Account-level API allows users to configure all Servers, Domains, and Sender Signatures associated with an Account.

No auth23 endpoints

Listed from public-apis database (MIT).