Embedding standalone node.js app with marketplace content

I’m developing a set of deep learning tools for Unreal Engine that I would like to release on the marketplace. The user interface is standard blueprint but the core libraries handling the math functions are contained within a standalone node.js app(packaged as an executable, no dependencies) which I have created specifically for this purpose and would like to embed within the unreal engine project. The node app gets called at the launch of the game with the CreatProcc c++ function, receives input from the user, and then closes when the game is finished. It does not reference any Unreal Engine source code. I would like to know if this acceptable for a marketplace submission, and if so, what category it would best be placed under (Plugin, Blueprints etc.)