A Thankster “User API Key” is for users of our integrations. You get one when you sign up for a Thankster plan for use with one of those integrations. Its purpose is primarily to identity you for the that application
Once you have a User API Key you can see it again by visiting account menu > My Profile.
This is the API key developers will use to develop applications using our API. If you would like one, and a link to our API document, please Contact Us.