The Elearning Community

I'd like to attach a api to run when a user passes a course and is awarded a certificate. This API just adds the username, name, email address and some other fields to a Campaign Monitor list. Is there a way to do this without messing with core?

You need a plugin. If interested contact me with a private message.

In the latest version 2.3 we introduced new web services to retrieve certificates released for users, and API to get user data are already available