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. It provides a wide range of features out of the box and allows you to extend it with plugins. Here are some of the features:
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).
claude mcp add --transport http better-auth https://mcp.chonkie.ai/better-auth/better-auth-builder/mcp {
"$schema": "https://opencode.ai/config.json",
"mcp": {
"Better Auth": {
"type": "remote",
"url": "https://mcp.chonkie.ai/better-auth/better-auth-builder/mcp",
"enabled": true,
}
}
}{
"Better Auth": {
"url": "https://mcp.chonkie.ai/better-auth/better-auth-builder/mcp"
}
}