Over the past months we have been building various APIs here in Kollegorna using Rails. Although there has been a lot of fuzz about API frameworks in Ruby community like the sinatra-way and Grape the truth is that I never felt that Rails limits you when building APIs, especially if you have a large one. Today I will show how you can extend your Rails app and build an API without changing a single
![Build an API in your Rails app now! | Kollegorna Labs](https://cdn-ak-scissors.b.st-hatena.com/image/square/53ac958d41f54f5b3116dbbf23a89c8283ad0059/height=288;version=1;width=512/https%3A%2F%2Flabs.kollegorna.se%2Fassets%2Fimages%2Fmeta%2Fog.jpg)