This gem is the Ruby client library that helps connect Ruby applications to the FusionAuth (https://fusionauth.io) Identity and User Management platform.


Add this line to your application's Gemfile:

gem 'fusionauth_client'

And then execute:

$ bundle

Or install it yourself as:

$ gem install fusionauth_client


Once the gem is installed, you can call FusionAuth APIs like this:

require 'fusionauth/fusionauth_client'

# Construct the FusionAuth Client
client = FusionAuth::FusionAuthClient.new(

# Create a user + registration
id = SecureRandom.uuid
client.register(id, {
    :user => {
        :firstName => 'Ruby',
        :lastName => 'Client',
        :email => '[email protected]',
        :password => 'password'
    :registration => {
        :applicationId => application_id,
        :data => {
            :foo => 'bar'
        :preferredLanguages => %w(en fr),
        :roles => %w(user)

# Authenticate the user
response = client.({
    :loginId => '[email protected]',
    :password => 'password',
    :applicationId => application_id
user = response.success.response.user


Bug reports and pull requests are welcome on GitHub at https://github.com/FusionAuth/fusionauth-ruby-client. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.


The gem is available as open source under the terms of the Apache v2.0 License.