Rails API Auth is a Rails Engine that implements the "Resource Owner Password Credentials Grant" OAuth 2.0 flow as well as Facebook authentication for API projects.

A Devise extension to use passkeys instead of passwords for authentication, using warden-webauthn

LDAP authentication for humans

Devise based user authentication for AlchemyCMS.

OpenID authentication module for Devise using Rack::OpenID

Neo4j integration with the Devise authentication framework

Ruby wrapper for the Angellist API. The AngelList API provides developers with a RESTful interface to the AngelList data set. Some endpoints are public and require no authentication.

The spark_api gem handles most of the boilerplate for communicating with the Spark API rest services, including authentication and request parsing.

Allows applications using Train to speak to AWS; handles authentication, cacheing, and SDK dependency management.

Delicious HMAC Digest(if) authentication and AES-128-CBC encryption

Proof provides an easy-to-use JWT-based authentication system.

Rails-API authentication solution based on JWT and inspired by Devise.

Provides all the protocol you need in order to do authentication on your rack application. The implementation specifics can be found in http://github.com/cyx/shield-contrib

dm-devise adds DataMapper support to devise (http://github.com/plataformatec/devise) for authentication support for Rails

Rack middleware that provides authentication based on JSON Web Tokens.

Authentication plugin for the Trestle admin framework

A library for generating signed authentication tokens for use with Firebase. Uses your app secret.

minimalistic authentication

ActiveGraph integration with the Devise authentication framework

An easy drop in solution for rails to use GitHub authentication.