July 7th 2017
At this moment no changes are planned for the Coppermine backend API. Developed is underway for the Coppermine 3.0 CMS API. CMS version 3.0 gives you full control over themes, templates, pages and widgets. You can create your own apps within the CMS.
The Coppermine API is a REST API, see https://en.wikipedia.org/wiki/Representational_state_transfer for more information. To connect to the API you require a URL, login, password. These are supplied by Coppermine on request.