OAuth2orize - OAuth 2.0 Authorization Server Toolkit

OAuth2orize is a Node.js toolkit designed for implementing OAuth 2.0 authorization servers. It provides a suite of modular middleware functions that allow developers to construct a server supporting various OAuth 2.0 grant types, such as authorization code, implicit, password, and client credentials, along with refresh token functionality. The library, currently at stable version 1.12.0, integrates seamlessly with Passport.js for user authentication, acting primarily as the authorization layer. Its architecture requires application-specific route handlers and persistent storage for clients, authorization codes, and access tokens, which are not provided out-of-the-box. Due to its long-standing stability and minimal recent updates (last published 2 years ago), it operates under a maintenance release cadence, indicating it's a mature project rather than one undergoing active feature development. A key differentiator is its highly pluggable middleware design, allowing granular control over the OAuth flow, though this also means more boilerplate compared to opinionated, full-stack solutions.