authorization

The authentication glue you need.

Apache Casbin: an authorization library that supports access control models like ACL, RBAC, ABAC.

Internet-scale OpenID Certified™ OpenID Connect and OAuth2.1 provider that integrates with your user management through headless APIs. Solve OIDC/OAuth2 user cases over night. Consume as a service on Ory Network or self-host. Trusted by OpenAI and many others for scale and security. Written in Go.

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!

Apereo CAS - Identity & Single Sign On for all earthlings and beyond.

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, ...)

Easy integration with OAuth 2.0 service providers.

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

Modern data layer for TypeScript apps - type-safe ORM, built-in access control, automatic query services

Python Client for Supabase. Query Postgres from Flask, Django, FastAPI. Python user authentication, security policies, edge functions, file storage, and realtime data streaming. Good first issue.

A JWT based API for managing users and issuing JWT tokens

Handle roles and permissions in your Laravel application

An authorization library that supports access control models like ACL, RBAC, ABAC in Rust

Hierarchical Role Based Access Control for NodeJS

Python Social Auth - Core

Authentication and Authorization for CodeIgniter 4

Frontier is an all-in-one user management platform that provides identity, access and billing management to help organizations secure their systems and data. (Open source alternative to Clerk, WorkOS)