What are the most popular uses for the Atlassian API for administering the tools (as opposed to developing new add ons)?
For instance, I can see wanting to use the API to output a CSV of all projects with their permission scheme & users/groups with roles.
Or identifying which licensed users are not logging in.
I don't know if they API could do it but I'd love to be able to get a list of custom fields that are not associated with any active project (and delete them).
What else?