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:

...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:

pnpm @better-auth/cli mcp --cursor

pnpm @better-auth/cli mcp --claude-code

pnpm @better-auth/cli mcp --open-code

pnpm @better-auth/cli mcp --manual

Manual Configuration

Alternatively, you can manually configure the MCP server for each client:

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"
   }
}