While Thrinacia Web UI (AngularJS / Semantic UI front-end) is fully open source and you can modify it yourself at any time, the Thrinacia REST API is proprietary and closed source, so only our own developers have access to the REST API source code and are able to make modifications for REST API.
However we are always willing and able to work our clients to make specific modifications as needed. Thrinacia REST API modification for an individual client is considered custom work. Please view this FAQ for further information on custom work.