we are currently evaluating the integration of crash trackers for a mobile app that is developed in cross-platform style using c++ (and Unreal engine 4 to be specific).

The two possible candidates are crashlytics and hockeyapp.
While hockeyapp is exposing a REST Api to send crashes (see <http://support.hockeyapp.net/kb/api/api-crashes#post-custom-crashes>), we cannot find something similar for crashlytics.
We would prefer such a custom REST-solution, because the integration of crashlytics only seems to be easy for Android apps using Java and iOs apps using Objective-C.

Is there any way to send custom crashes to crashlytics?