Better Auth
Enables enterprise-grade authentication management with secure credential handling and support for multi-protocol auth, complete with tools for analyzing, setting up, and testing authentication systems.
What is Better Auth?
Better Auth is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to enables enterprise-grade authentication management with secure credential handling and support for multi-protocol auth, complete with tools for analyzing, setting up, and testing authentication system...
Enables enterprise-grade authentication management with secure credential handling and support for multi-protocol auth, complete with tools for analyzing, setting up, and testing authentication systems.
This server falls under the Security category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- Enables enterprise-grade authentication management with secu
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx better-auth-mcp-serverConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use Better Auth
The Better Auth MCP server brings enterprise-grade authentication management to AI assistants, providing tools to analyze project authentication setups, initialize Better Auth with various providers, test login and registration flows, run OWASP-aligned security assessments, and generate migration plans from existing auth systems like NextAuth. It supports real-time monitoring of authentication events and access to live configuration and log resources. Developers can use it to audit, configure, and validate authentication in their applications through natural language without manually inspecting auth code or configs.
Prerequisites
- Node.js 18 or later installed
- A Better Auth project ID and API key (BETTER_AUTH_PROJECT_ID and BETTER_AUTH_API_KEY)
- npx available (included with npm 5.2+)
- Claude Desktop or another MCP-compatible client
Install via Smithery CLI (recommended)
The easiest installation method uses the Smithery CLI, which automatically configures the server for your MCP client.
npx -y @smithery/cli install @nahmanmate/better-auth-mcp-server --client claudeOr run directly with npx
Alternatively, run the server directly using npx with your Better Auth credentials passed as environment variables.
BETTER_AUTH_PROJECT_ID=your-project-id \
BETTER_AUTH_API_KEY=your-api-key \
npx better-auth-mcp-serverSet environment variables
The server requires BETTER_AUTH_PROJECT_ID and BETTER_AUTH_API_KEY. Optionally set BETTER_AUTH_ENV (development, staging, or production) and LOG_LEVEL (info, debug, or error).
Configure Claude Desktop manually
If you prefer manual configuration, add the server block to your claude_desktop_config.json with your credentials in the env section.
Verify with a project analysis
Open Claude Desktop and ask it to analyze your project's authentication setup to confirm the server is working and connected to your Better Auth account.
Better Auth Examples
Client configuration
Add this block to your claude_desktop_config.json to register the Better Auth MCP server with your credentials.
{
"mcpServers": {
"better-auth": {
"command": "npx",
"args": ["better-auth-mcp-server"],
"env": {
"BETTER_AUTH_PROJECT_ID": "your-project-id",
"BETTER_AUTH_API_KEY": "your-api-key",
"BETTER_AUTH_ENV": "development",
"LOG_LEVEL": "info"
}
}
}
}Prompts to try
Use these prompts in Claude Desktop to analyze, configure, and test authentication in your application.
- "Analyze my project at ./my-next-app and recommend an authentication setup."
- "Set up Better Auth for my project with email/password and Google OAuth providers."
- "Test the login and registration flows for my application."
- "Run a security assessment of my authentication setup against OWASP guidelines."
- "Generate a migration plan to move my project from NextAuth to Better Auth."
- "Show me the current Better Auth configuration and recent authentication logs."Troubleshooting Better Auth
Authentication fails with invalid API key error
Verify that BETTER_AUTH_PROJECT_ID and BETTER_AUTH_API_KEY are correct and that the API key has not been rotated or revoked. Check your Better Auth dashboard to confirm the credentials match the project you are working with.
test_auth_flows fails with connection refused
The tool needs to reach your running application to test auth flows. Ensure your application is running locally before invoking this tool, and that the project path or URL configured in the tool parameters points to a reachable endpoint.
Smithery CLI install completes but Claude Desktop shows no tools
Restart Claude Desktop after the Smithery installation completes. If tools still don't appear, check claude_desktop_config.json to confirm the server entry was written correctly, and verify that npx can resolve better-auth-mcp-server by running it manually in a terminal.
Frequently Asked Questions about Better Auth
What is Better Auth?
Better Auth is a Model Context Protocol (MCP) server that enables enterprise-grade authentication management with secure credential handling and support for multi-protocol auth, complete with tools for analyzing, setting up, and testing authentication systems. It connects AI assistants to external tools and data sources through a standardized interface.
How do I install Better Auth?
Follow the installation instructions on the Better Auth GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.
Which AI clients work with Better Auth?
Better Auth works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is Better Auth free to use?
Yes, Better Auth is open source and available under the AGPL 3.0 license. You can use it freely in both personal and commercial projects.
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