📌Overview

Purpose: To provide an enterprise-grade authentication management solution with robust security and multiple protocol support.

Overview: The Better Auth MCP Server is designed to streamline the authentication process while prioritizing security. It supports various authentication protocols and features advanced capabilities to enhance the overall user authentication experience.

Key Features:

• Secure Credential Management: Utilizes AES-256 encryption for managing user credentials, ensuring that sensitive data remains protected.

• Multi-Protocol Authentication: Supports a variety of authentication protocols including OAuth2, SAML, and LDAP, allowing for flexible integration in diverse environments.

• Real-time Threat Detection: Incorporates features for monitoring authentication flows and detecting potential security threats in real-time, equipping organizations with proactive defense mechanisms.

• Project Analysis Tools: Offers tools to analyze the project's structure, existing authentication methods, and provides a step-by-step migration plan for upgrades.

• Testing & Security Checks: Facilitates testing of various authentication flows and runs security checks aligned with OWASP standards to maintain high security levels.

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better-auth-mcp-server MCP Server

MCP Server for Authentication Management

Enterprise-grade authentication solution providing:

• 🔐 Secure credential management with AES-256 encryption
• ⚙️ Multi-protocol auth (OAuth2, SAML, LDAP)
• 🛡️ Real-time threat detection and prevention

Features

Core Tools

• analyze_project - Analyze project structure for auth setup recommendations
• setup_better_auth - Configure auth providers with project ID and API key
• analyze_current_auth - Detect existing auth.js/next-auth implementations
• generate_migration_plan - Create step-by-step migration path

Testing & Security

• test_auth_flows - Validate login/register/reset/2fa flows
• test_security - Run OWASP-aligned security checks
• analyze_logs - Review auth system logs for issues
• monitor_auth_flows - Real-time authentication monitoring

Available Resources

• better-auth://config - Current Better-Auth configuration settings
• better-auth://logs - Authentication system logs

Development

Clone and install:

git clone https://github.com/better-auth-mcp-server/better-auth-mcp-server.git
cd better-auth-mcp-server
npm install

Build the server:

npm run build

For development with auto-rebuild:

npm run watch

Configuration

Environment Variables

# Required
BETTER_AUTH_PROJECT_ID=your-project-id
BETTER_AUTH_API_KEY=your-api-key

# Optional
BETTER_AUTH_ENV=development|staging|production
LOG_LEVEL=info|debug|error

Security Best Practices

1. API Key Management

   • Store API keys in environment variables
   • Rotate keys regularly
   • Use different keys per environment

2. Access Control

   • Implement rate limiting
   • Configure IP allowlists
   • Use principle of least privilege

3. Monitoring

   • Enable audit logging
   • Monitor auth failures
   • Set up alerts for suspicious activity

Installation

Installing via Smithery

To install Better Auth MCP Server for Claude Desktop automatically via Smithery:

npx -y @smithery/cli install @nahmanmate/better-auth-mcp-server --client claude

To use with Claude Desktop, add the server config:

On MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json
On Windows: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "better-auth-mcp-server": {
      "command": "node",
      "args": ["/path/to/better-auth-mcp-server/build/index.js"],
      "disabled": false,
      "alwaysAllow": []
    }
  }
}

Debugging

Since MCP servers communicate over stdio, debugging can be challenging. We recommend using the MCP Inspector, which is available as a package script:

npm run inspector

The Inspector will provide a URL to access debugging tools in your browser.

Usage Examples

Project Setup

// Initialize Better-Auth in your project
await mcp.useTool('setup_better_auth', {
  projectPath: './my-next-app',
  config: {
    projectId: process.env.BETTER_AUTH_PROJECT_ID,
    apiKey: process.env.BETTER_AUTH_API_KEY
  }
});

// Test core authentication flows
await mcp.useTool('test_auth_flows', {
  flows: ['login', 'register', '2fa']
});

Migration from Auth.js/NextAuth

// Analyze current auth implementation
await mcp.useTool('analyze_current_auth', {
  projectPath: './my-next-app'
});

// Generate migration steps
await mcp.useTool('generate_migration_plan', {
  projectPath: './my-next-app',
  currentAuthType: 'next-auth'
});