It might be worth noting that Grape is Rack based and will work very well alongside Rails or standalone on top of Rack (sample in https://github.com/dblock/grap

It might be worth noting that Grape is Rack based and will work very well alongside Rails or standalone on top of Rack (sample in https://github.com/dblock/grape-on-rack https://github.com/dblock/grape-on-rack).