Authorization

Verified open-source repositories and technical documentation formatted for LLM context windows and autonomous AI coding agents (35 repositories indexed).

Open source, composable payments platform | PCI compliant | SaaS and Self-host options | Enables connectivity to multiple payment, payout, fraud, vault and tokenization providers | Uplifts authorization with intelligent routing and revenue recovery | Reduce payment processing costs with cost observability | Reduces payment ops with reconciliation

43,468 GitHub

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

20,311 GitHub

✨ 开源、免费、一站式 Java 权限认证框架，让鉴权变得简单、优雅！—— 登录认证、权限认证、分布式 Session 会话、微服务网关鉴权、SSO 单点登录、OAuth2.0 统一认证、jwt 集成、API Key 秘钥授权、API 参数签名

18,977 GitHub

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.

17,416 GitHub

Open-source web application framework for ASP.NET Core! Offers an opinionated architecture to build enterprise software solutions with best practices on top of the .NET. Provides the fundamental infrastructure, cross-cutting-concern implementations, startup templates, application modules, UI themes, tooling and documentation.

14,391 GitHub

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

14,315 GitHub

Google's officially supported Node.js client library for accessing Google APIs. Support for authorization and authentication with OAuth 2.0, API Keys and JWT (Service Tokens) is included.

12,214 GitHub

The tiniest OpenID Certified™ authorization and authentication server you have ever seen.

8,103 GitHub

casl

TypeScript Doc

CASL is an isomorphic authorization JavaScript library which restricts what resources a given user is allowed to access

7,028 GitHub

Open Source, Google Zanzibar-inspired database for scalably storing and querying fine-grained authorization data

6,945 GitHub

stack-auth

TypeScript Doc

The user infrastructure platform. You choose the frontend, backend, and database. Hexclave handles everything else.

6,843 GitHub

↥ ↥ ↥ Follow for updates An RBAC permission management system based on Spring Cloud 2025, Spring Boot 4, and OAuth2.

6,664 GitHub

An open-source authorization as a service inspired by Google Zanzibar, designed to build and manage fine-grained and scalable authorization systems for any application. — Permify is now part of FusionAuth 🎉

5,928 GitHub

opal

Python Doc

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

5,452 GitHub

The most scalable and customizable permission server on the market. Fix your slow or broken permission system with Google's proven "Zanzibar" approach. Supports ACL, RBAC, and more. Written in Go, cloud native, headless, API-first. Available as a service on Ory Network and for self-hosters.

5,375 GitHub

A high performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar

5,305 GitHub

Apache Shiro is a powerful and easy-to-use Java security framework that performs authentication, authorization, cryptography, and session management

4,430 GitHub

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.

4,398 GitHub