API programs exist in almost every organization, sometimes explicitly and sometimes implicitly. Even if you don’t have an explicit API program yet, the success of all of your digital investments and activities still critically depends on how APIs are used and managed. Many organizations report that they are not perfectly happy with their API initiatives and programs. This talk presents patterns and anti-patterns for API programs. While using these for assessing your organization’s API program does not guarantee success, they will help to improve the overall effectiveness of the program, and therefore will also help the larger digital transformation journey.