I'm trying to access slots in the blueprints, however I can't seem to find how to do it. For example something like clicking on the Spine character and getting which slot has been clicked.
Is this even possible? :
Interacting with slots inside Unreal
I'm afraid that's currently not possible via BluePrints. For that, you'd have to drop down into C++ and use the spine-cpp API, and translate mouse/touch click coordinates to the skeleton coordinate system.