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Better Auth MCP Server

Better Auth MCP Server

Public
LexiconAlex/better-auth-mcp-server

Enterprise-grade Model Context Protocol server offering secure AES-256 encrypted credential management, multi-protocol authentication (OAuth2, SAML, LDAP), real-time threat detection, comprehensive auth flow testing, migration planning, and audit logging for robust authentication management.

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May 30, 2025
Updated Jun 4, 2025

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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' });
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