Authentication middleware

6 reusable Authentication middleware libraries across every platform — libraries, SDKs, and drop-in systems. You should never have to know which ecosystem it lives in.

• Auth0

  by Okta · Free tier + paid · Commercial · middleware

  Identity platform: authentication, SSO, and authorization as a service via SDKs and APIs.

  AuthenticationAuthorization   WebNode.jsReactAndroidiOS

• git-credential-oauth

  by homebrew · Free · homebrew

  Git credential helper that authenticates in browser using OAuth

  AuthenticationDeveloper Tools   Web

• Lucia

  by Lucia · Free · MIT · middleware

  Open-source auth library for TypeScript — sessions and credentials you fully control.

  Authentication   TypeScriptNode.jsWeb

• propagate-id-entra

  by ozgurkarahan · Free · github

  This example shows how to propagate a user's Entra ID identity end-to-end — from the browser, through an AI Foundry agent with MCP tools, through API Management, all the way to the backend API. No service accounts in the data path.

  AIAuthenticationCloudAPI   PythonWeb

• rust-auth

  by bymaxone · Free · github

  Full-stack authentication library for Rust (Axum 0.8), React 19 & Next.js 16 — JWT, MFA, OAuth, sessions, multi-tenant SaaS ready. Pure-Rust crypto with WebAssembly edge verification.

  AuthenticationAuthorization   RustReactWeb

• Task-Management-Dashboard

  by VitorFelisbert · Free · github

  Manage, track, and organize tasks with a React and TypeScript dashboard featuring real-time search, filters, views, and automatic browser saving.

  AIAuthenticationCloudWorkflow   TypeScriptReactWeb