Open-source alternatives to Node Oidc Provider

Doorkeeper is an OAuth 2 authorization server and provider for Ruby on Rails and Grape applications. It provides the necessary framework to build an authorization server that issues and validates security tokens for third-party applications, effectively acting as a security middleware to protect API endpoints. The project integrates an identity layer via OpenID Connect to verify user identities and retrieve profile information. It supports a variety of security patterns, including the implementation of the PKCE flow for public clients and the issuance of stateless JSON Web Tokens. Its broade

Authlib is a comprehensive Python framework for implementing OAuth 1.0, OAuth 2.0, and OpenID Connect clients and servers. It provides a complete toolkit for identity management, spanning the development of authorization servers, resource servers, and client-side integrations. The library distinguishes itself through a full implementation of the JOSE specifications, including JSON Web Tokens, Encryption, Signatures, and Keys. It features specialized capabilities for non-interactive authentication via service account assertion frameworks and a compliance-correction layer designed to handle ide

Dex is an OpenID Connect provider and identity federation proxy that translates authentication signals from various upstream sources into a unified OpenID Connect interface. It functions as a multi-protocol identity broker, enabling client applications to implement a single standard while delegating user verification to external identity providers. The project distinguishes itself through a pluggable connector architecture that bridges disparate protocols including LDAP, SAML, and OAuth2. It provides specific integrations for services such as GitHub, Google, GitLab, and Microsoft, while offer

This project is an authentication and authorization platform built on the Spring framework that functions as a centralized identity provider and authorization server. It manages user identities and protects resources by implementing standardized protocols to verify credentials and issue secure tokens for web applications. The platform distinguishes itself by providing a comprehensive framework for managing complex authorization flows and identity verification. It supports dynamic client registration to automate the onboarding of third-party applications and utilizes relational database persis

OpenAuth is a standards-based authentication server and identity provider that implements OAuth 2.0 and OpenID Connect protocols. It serves as a centralized system for managing user identities, issuing access tokens, and orchestrating authentication flows across various services. The project functions as a federated identity gateway, aggregating external providers such as Google, GitHub, Microsoft, Apple, and Discord into a unified login flow. It distinguishes itself with a multi-tenant architecture that supports pluggable identity providers and customizable user interface frameworks for bran

FastMCP is a Python framework designed for building servers that expose functions, resources, and prompts to AI models using the Model Context Protocol. It simplifies the development process by automatically deriving tool metadata, input schemas, and documentation directly from Python function signatures and type hints. The framework provides a unified container for managing these components, allowing developers to build modular applications that integrate seamlessly with AI assistants. The project distinguishes itself through its support for interactive, server-defined user interface compone

Hanko is an open-source identity provider and customer identity and access management system. It serves as a passkey authentication service and an OAuth and SAML SSO gateway, allowing applications to authenticate users and issue tokens via standard identity protocols. The project distinguishes itself through a strong focus on passwordless access using WebAuthn-based passkeys and email-based passcodes. It provides framework-agnostic authentication interfaces as customizable web components that can be embedded directly into web applications to handle login, registration, and profile management.

Spring Authorization Server is an OAuth 2.1 and OpenID Connect 1.0 authorization server built on Spring Security. It implements the full protocol surface for issuing access and refresh tokens, including authorization code, client credentials, device code, and token exchange grants, as well as pushed authorization requests and user consent management. The server also functions as an OpenID Connect provider, supporting ID tokens, userinfo, discovery, logout, and dynamic client registration. The project distinguishes itself through an extensible framework that allows custom grant types, pluggabl

Kanidm is a centralized identity management server designed to handle authentication, authorization, and directory services across distributed infrastructure. It provides a comprehensive framework for managing human and service accounts, utilizing a schema-driven database to store identity records, group memberships, and system attributes. The platform supports a wide range of authentication methods, including passkeys, passwords, and standard protocols like OAuth2, OIDC, LDAP, and RADIUS. The system distinguishes itself through a granular access control engine that enforces security policies

Casbin is an authorization library that provides a model-based engine for enforcing access control across diverse application environments. It decouples authorization logic from application code by using a configuration-driven approach, allowing developers to define access rules and evaluation logic independently. The system supports a wide range of access control models, including role-based, attribute-based, and relationship-based patterns, which are evaluated at runtime to determine if a subject is permitted to perform an action on a resource. The project distinguishes itself through a hig

This project is a PHP library for implementing a spec-compliant OAuth 2.0 authorization server. It serves as an authentication framework for managing user identities and client authorizations, providing the necessary components to issue and validate access and refresh tokens. The server supports a wide range of standardized authorization flows, including authorization code exchange, device grants, implicit flows, and PKCE enforcement. It handles complex token lifecycles through refresh token rotation, scope management, and the use of asymmetric keys for signing digital tokens. The system pro

Tinyauth is an authentication middleware service and identity provider that verifies user identities to grant system access. It operates as a standalone server or as an authentication gateway, utilizing a reverse proxy model to intercept requests and validate credentials before traffic reaches protected backend services. The project functions as an OpenID Connect provider for single sign-on experiences and an OAuth 2.0 gateway that delegates verification to external providers such as Google and GitHub. It also acts as an LDAP authentication server, allowing for centralized user management and

Hono is a minimal JavaScript HTTP framework designed for building web servers across multiple runtimes, including Node.js, edge runtimes, and serverless platforms. It functions as a cross-runtime web server and a web standard API wrapper, normalizing various runtime request and response objects into standard Web API signatures. The project serves as an HTTP middleware orchestrator and request handler, utilizing a middleware-based request pipeline and hierarchical route mounting to create modular server structures. It distinguishes itself through a runtime-agnostic event wrapper that ensures c

Vercel is a cloud platform for building, deploying, and scaling web applications. It provides a unified infrastructure that automates the build process by detecting project frameworks and distributing static and dynamic content through a global content delivery network. The platform executes application logic using serverless functions that scale automatically based on real-time traffic demand. The platform distinguishes itself through a centralized AI gateway that proxies requests to multiple model providers, enabling standardized authentication, observability, and cost tracking. It supports

mcp-context-forge is a Model Context Protocol federation gateway that unifies diverse AI tool servers and APIs into a single consistent interface for discovery and execution. It acts as a centralized proxy that aggregates multiple servers and APIs, allowing AI agents to access and invoke a unified set of tools, prompts, and resources. The project distinguishes itself through a multi-protocol translation bridge that converts communication between standard I/O, SSE, gRPC, and REST to enable interoperability between disparate tool servers. It includes a comprehensive LLM evaluation framework for

Quarkus is a Kubernetes-native Java framework designed for building high-performance, memory-efficient applications. It utilizes ahead-of-time native compilation to transform Java code into standalone, optimized binaries that eliminate the need for a virtual machine, enabling rapid startup and reduced memory consumption. By performing code augmentation during the build phase, it shifts heavy processing tasks away from runtime, ensuring that applications are optimized for cloud-native environments. The framework distinguishes itself through a unified approach to reactive and imperative program

node-oauth2-server is an OAuth2 server implementation for Node.js that functions as an authorization provider. It enables the creation of a centralized server to manage client registration and issue access tokens for third-party applications using the OAuth2 protocol. The project operates as Node.js middleware, integrating authorization logic directly into web application request pipelines. It provides a bearer token validator to verify identity and permissions by checking security tokens within incoming HTTP request headers. The system covers API access control, token management, and user a

Authelia is a centralized identity and access management server designed to secure web applications through unified authentication and authorization. It functions as an identity authority that enables single sign-on across diverse platforms, allowing users to access multiple services with a single set of credentials. By acting as a standards-compliant provider, it facilitates secure identity propagation and token issuance for client applications. The platform distinguishes itself through its ability to integrate directly with web gateways as a reverse proxy authentication middleware, intercep

This project is a cloud-native identity and access management platform designed to centralize authentication, authorization, and identity lifecycle management. It functions as a standards-compliant OpenID Connect authorization server, providing secure session management and token issuance for web, mobile, and device-based applications. The platform is built to handle complex identity requirements through stateless token authentication and support for modern passwordless methods, including biometrics and hardware keys. What distinguishes this platform is its native support for multi-tenant env

Keycloak is an open-source identity and access management server that provides a centralized platform for user authentication, authorization, and identity federation. It functions as a standards-compliant identity provider, utilizing a centralized engine to validate credentials and issue cryptographically signed tokens based on industry-standard protocols like OpenID Connect and SAML. This enables organizations to secure diverse applications and services through a unified authentication layer. The platform distinguishes itself through its cloud-native orchestration and high-availability capab

Casdoor is a centralized identity and access management platform that functions as an OAuth 2.0 authorization server. It provides a comprehensive suite of services for managing user identities, authentication sessions, and access policies across both web and machine-to-machine applications. Built with a decoupled frontend-backend architecture in Go, the platform supports high-concurrency environments and offers a web-based management interface for administrative tasks. The platform distinguishes itself through its extensive support for federated identity management, allowing integration with

This project is a microservice framework for building scalable backend systems in Go. It provides an architecture for distributed systems with integrated support for service discovery, load balancing, and fault-tolerance mechanisms. The framework distinguishes itself through a domain-driven layered architecture and a remote-first configuration system that synchronizes settings between remote stores and local files with automatic failover. It implements a high-performance communication model using gRPC for unary and streaming data exchange, as well as real-time notification systems for managin

This is a JSON Web Token authentication package for the Django REST Framework that manages stateless user identities. It serves as an authentication provider and token manager used to issue and validate signed tokens to maintain user sessions across multiple requests. The project implements a dual-token lifecycle, issuing short-lived access tokens and long-lived refresh tokens to balance security with session persistence. It features token rotation to prevent replay attacks and a blacklisting system to invalidate compromised credentials. Additionally, it supports sliding-window expiration to

Dex is an OpenID Connect identity provider that functions as an identity federation gateway. It authenticates users and issues signed tokens for applications by using a variety of pluggable connectors to interface with external identity sources. The project focuses on federating multiple external identity providers into a single authentication portal. It maps diverse external authentication sources to a uniform internal user representation and manages the orchestration of authorization handshakes between clients and identity sources. Capability areas include centralized user authentication,

Sa-Token is a Java-based authentication and authorization framework designed to manage user sessions, permissions, and identity verification within web applications and microservice architectures. It provides a centralized security layer that enforces access control policies and identity validation across distributed service environments and API gateways. The framework distinguishes itself through its support for cross-domain single sign-on and its ability to function as an OAuth2 identity provider. It manages user session lifecycles by applying configurable rules for single or multi-login re

Model Context Protocol is a standardized framework for connecting large language models to external data sources and executable tools. It enables the creation of a universal interface where servers expose tools, resources, and prompts that can be discovered and utilized by various AI clients. The protocol utilizes a JSON-RPC message system that is transport-agnostic, supporting both standard input/output for local processes and HTTP with server-sent events for remote connections. It emphasizes security and control by delegating model sampling to the client to keep API keys secure from servers

django-allauth is a comprehensive authentication framework for Django applications that manages user registration, account ownership verification, and secure login processes. It provides a system for handling the entire user account lifecycle, including the ability to define custom signup fields and implement identity verification. The project distinguishes itself by providing a suite of OAuth and SAML integrations for social account authentication and the capability to act as an OpenID Connect identity provider. It further supports decoupled architectures through a token-based headless authe