To access your API key, log in to your Campaign Monitor account and click Account Settings. Below your company name and other details, click Show API Key as pictured below.
You will only see the "Show API Key" link if you have verified your account. This is done by clicking the verification link in the email we sent you after your Campaign Monitor account was created.
Tip: You may also consider authenticating using OAuth instead of an API Key.
Client and subscriber list API details
For information on developing your own applications to integrate with Campaign Monitor, view our API documentation. It will help you work your way through every stage of the setup process, including instructions for finding things like: client ID and list ID information.
Important: Your API key is like a key to your account and all of its data, so only use it in third-party websites and applications that you trust.