Doorkeeper 5.1.0 Doorkeeper is an OAuth 2 provider for Rails. It is built on top of Rails Engines. Current Rails version: 6.0.0 Doorkeeper Provider App This app is an example of an OAuth 2 provider using Doorkeeper gem, Rails 5.2 and Devise. Check out the app hosted on heroku for a live demo. About Doorkeeper Gem For more information about the gem, documentation, wiki and another resources, check