As far as I can see from Grape README it works as Rack application that is mounted to your routes. So there is no rails controllers and actions.
So it looks like no, this gem will not work with Grape API. You need to write separate one that will declare grape-specific metrics (I'm not even know how they should be named: actions, endpoints, methods?). I've never worked with Grape so can't really help there.
As far as I can see from Grape README it works as Rack application that is mounted to your routes. So there is no rails controllers and actions.
So it looks like no, this gem will not work with Grape API. You need to write separate one that will declare grape-specific metrics (I'm not even know how they should be named: actions, endpoints, methods?). I've never worked with Grape so can't really help there.