API documentation

Level up your campaigns

Learn how to build, integrate, and grow with MailerLite.

What is MailerLite?

MailerLite is an intuitive email marketing solution for people of all skill levels. The key principle behind our solution is simplicity. We provide drag & drop content editors, simplified subscriber management and advanced automations that are easy to set up.

Read more about our services on our website or get your questions answered at the help center.

Getting started

Don't have a MailerLite account? Create one for free! Not sure how to generate API key? Click to read the article.

Create an account

You need a MailerLite account to use our API. Sign up for a free account here.

Generate API key

This help article explains how to locate or generate your API key.

Frequently Asked Questions

What is the difference between this and Classic API?

This is the latest version of the MailerLite API and it follows date-based versioning. We released it on March 22nd, 2022 alongside the new version of MailerLite.

API V1 and V2 only works with MailerLite Classic and will eventually be deprecated.

Which account version I use?

Accounts created before March 22nd, 2022 use MailerLite Classic. Accounts created after March 22nd, 2022 use the new MailerLite.

Which API version shall I use?

MailerLite Classic account users should use API V1 or V2 and consider eventually migrating to the new MailerLite.

All new MailerLite accounts should use this latest and improved API.