Doorkeeper — awesome OAuth 2 provider for your Rails / Grape app.

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Doorkeeper is a gem (Rails engine) that makes it easy to introduce OAuth 2 provider functionality to your Ruby on Rails or Grape application.

Supported features:

Table of Contents


This documentation is valid for main branch. Please check the documentation for the version of doorkeeper you are using in:

Additionally, other resources can be found on:


Installation depends on the framework you're using. The first step is to add the following to your Gemfile:

gem 'doorkeeper'

And run bundle install. After this, check out the guide related to the framework you're using.

Ruby on Rails

Doorkeeper currently supports Ruby on Rails >= 5.0. See the guide here.


Guide for integration with Grape framework can be found here.


Doorkeeper supports Active Record by default, but can be configured to work with the following ORMs:

ORM Support via
Active Record by default
MongoDB doorkeeper-gem/doorkeeper-mongodb
Sequel nbulaj/doorkeeper-sequel
Couchbase acaprojects/doorkeeper-couchbase
RethinkDB aca-labs/doorkeeper-rethinkdb


Extensions that are not included by default and can be installed separately.

OpenID Connect extension doorkeeper-gem/doorkeeper-openid_connect
JWT Token support doorkeeper-gem/doorkeeper-jwt
Assertion grant extension doorkeeper-gem/doorkeeper-grants_assertion
I18n translations doorkeeper-gem/doorkeeper-i18n
CIBA - Client Initiated Backchannel Authentication Flow extension doorkeeper-ciba
Device Authorization Grant doorkeeper-device_authorization_grant

Example Applications

These applications show how Doorkeeper works and how to integrate with it. Start with the oAuth2 server and use the clients to connect with the server.

Application Link
OAuth2 Server with Doorkeeper doorkeeper-gem/doorkeeper-provider-app
Sinatra Client connected to Provider App doorkeeper-gem/doorkeeper-sinatra-client
Devise + Omniauth Client doorkeeper-gem/doorkeeper-devise-client

You may want to create a client application to test the integration. Check out these client examples in our wiki or follow this tutorial here.


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To run the local engine server:

bundle install
bundle exec rake doorkeeper:server

By default, it uses the latest Rails version with ActiveRecord. To run the tests with a specific Rails version:

BUNDLE_GEMFILE=gemfiles/rails_6_0.gemfile bundle exec rake

You can also experiment with the changes using bin/console. It uses in-memory SQLite database and default Doorkeeper config, but you can reestablish connection or reconfigure the gem if you need.


Want to contribute and don't know where to start? Check out features we're missing, create example apps, integrate the gem with your app and let us know!

Also, check out our contributing guidelines page.


Thanks to all our awesome contributors!


MIT License. Created in Applicake. Maintained by the community.