# Open API Specification For Rails OasRails is a Rails engine for generating **automatic interactive documentation for your Rails APIs**. It generates an **OAS 3.1** document and displays it using **[RapiDoc](https://rapidocweb.com)**. ## What Sets OasRails Apart? - **Dynamic**: No command required to generate docs - **Simple**: Complement default documentation with a few comments; no need to learn a complex DSL - **Pure Ruby on Rails APIs**: No additional frameworks needed (e.g., Grape, RSpec)