Introduction
Better Auth is a framework‑agnostic, universal authentication and authorization framework for TypeScript.
It provides a comprehensive set of features out of the box and includes a plugin ecosystem that simplifies adding advanced functionalities.
Whether you need 2FA, passkey, multi‑tenancy, multi‑session support, or even enterprise features like SSO, creating your own IDP, it lets you focus on building your application instead of reinventing the wheel.
Features
Better Auth aims to be the most comprehensive auth library. Below are some of the key features it offers:
| Feature | Description |
|---|---|
| Framework Agnostic | Support for most popular frameworks |
| Email & Password | Built‑in support for secure email and password authentication |
| Account & Session Management | Manage user accounts and sessions with ease |
| Built‑In Rate Limiter | Built‑in rate limiter with custom rules |
| Automatic Database Management | Automatic database management and migrations |
| Social Sign‑on | Multiple social sign‑on providers |
| Organization & Access Control | Manage organizations and access control |
| Two Factor Authentication | Secure your users with two factor authentication |
| Plugin Ecosystem | Even more capabilities with plugins |
…and much more!
AI tooling
LLMs.txt
Better Auth exposes an LLMs.txt that helps AI models understand how to integrate and interact with your authentication system.
See it at https://better-auth.com/llms.txt.
MCP
Better Auth provides an MCP server so you can use it with any AI model that supports the Model Context Protocol (MCP).
CLI Options
Use the Better Auth CLI to easily add the MCP server to your preferred client:
# Cursor
npx @better-auth/cli mcp --cursor
# Claude Code
npx @better-auth/cli mcp --claude-code
# Open Code
npx @better-auth/cli mcp --open-code
# Manual
npx @better-auth/cli mcp --manual