Run razer macro externally/dev kits that are not chroma focused

So I know it's possible only because when you set the key press for a global macro, you can use any device and synapse will read that input. It just wont trigger from any device. Ultimately, I would like some sort of api into synapse it's self. I try looking for dev kits, but it's all chroma chroma chroma. Is there not a core sdk?