How to create new actions for the overflow (...) menu

[CJCombrink]

Hosting: Bitbucket server (migrating to Data Center soon, in the coming week).

Is it possible to add a new button to the "..." menu of a repository that can pop up a dialog for the user to fill out and then send a REST command to an external service?

My use case is a "Create release" button, the user populate some fields etc. , after which a REST request is sent to Jenkins to start a build and some other actions or services.

The content of the dialog will probably be populated with information from the repo, like a version number in a file or results of REST requests, depending on how easy or this is. 

[Aron Gombas _Midori_]

It is possible to add new entry points (menu items in menus, button in different screens, custom navigation, custom screens, etc.) to the Bitbucket Server user interface, but it requires developing a so-called P2 plugin ("app"). Bitbucket Data Server is the same as Bitbucket Server in this sense.

If you are ready to develop an app, start reading here: https://developer.atlassian.com/server/bitbucket/