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Better Auth MCP Server

by LexiconAlex

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' });
-
security - not tested
A
license - permissive license
-
quality - not tested

Enterprise-grade authentication solution that provides secure credential management with encryption, multi-protocol authentication (OAuth2, SAML, LDAP), and real-time threat detection for applications.

  1. Features
    1. Core Tools
    2. Testing & Security
    3. Available Resources
  2. Development
    1. Configuration
      1. Environment Variables
      2. Security Best Practices
    2. Installation
      1. Installing via Smithery
      2. Debugging
    3. Usage Examples
      1. Project Setup
      2. Migration from Auth.js/NextAuth

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