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The authentication glue you need.

ZITADEL - Identity infrastructure, simplified for you.

🧑‍🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.

Expose your FastAPI endpoints as Model Context Protocol (MCP) tools, with Auth!

The authorization Gem for Ruby on Rails.

Doorkeeper is an OAuth 2 provider for Ruby on Rails / Grape.

Policy and data administration, distribution, and real-time updates on top of Policy Agents (OPA, Cedar, ...)

Cerbos is the open core, language-agnostic, scalable authorization solution that makes user permissions and authorization simple to implement and manage by writing context-aware access control policies for your application resources.

A generic, spec-compliant, thorough implementation of the OAuth request-signing logic

🔐 oauth2 - A Ruby wrapper for the OAuth 2.0, & 2.1 Authorization Frameworks, including OpenID Connect (OIDC)

Awesome Django authorization, without the database

Authorization framework for Ruby/Rails applications

Warrant is a highly scalable, centralized authorization service based on Google Zanzibar. Use it to define, enforce, query, and audit application authorization and access control.

Multi-role and whitelist based authorization gem for Rails (and not only Rails!)

A binary and file access authorization system for macOS.

Simple authorization gem for GraphQL :lock:

Scope-based authorization for Ruby on Rails.

Simple role-based authorization library for Ruby on Rails

A multi-account, form-based, database-less, application-wide, Rails authenticator.