Campaign Monitor API

The Campaign Monitor API makes it easy for developers to add their own layer of awesomeness on top of the Campaign Monitor platform.

What kind of awesomeness can I build?

The API gives you access to almost all of the features available in your account, letting you do things like:

  • Automatically sync subscribers between Campaign Monitor and a third party tool.
  • Develop useful plugins and integrations like these guys for other popular apps.
  • Create and send custom email campaigns to segments of subscribers built on the fly.
  • Automatically create a client account, set billing and load it with ready-to-send templates.

Ready to get started?

We've put together a detailed and easy to follow guide to help you get the ball rolling. This includes where to access your API key, the input formats we expect, secure access and lots more. What are you waiting for, get started.

Common questions

  • Where are the old API docs?
    While we encourage you to work with the latest and greatest version of our API, you can still access the old documentation and wrappers for Version 2. But seriously, quit 'livin in the past.
  • Where can I find my API key?
    The details on where to find your API key, plus lots of general getting started info can be found in our getting started guide.
Samples & Wrappers

We currently supply wrappers for Ruby, Python, PHP, .NET, Java and Perl with more on the way.

Chat with other API devs

Need help working with the API or have any questions for other API developers? Head over to the API developer section of our forums.

Existing Plugins

Looking for some API inspiration, or want to see if an integration has already been done? Check out the integrations and plugins already in the wild.