PlumyCat/mcp-create-enhanced

MCP Create Enhanced

An enhanced version of the dynamic MCP server management service that creates, runs, and manages Model Context Protocol (MCP) servers dynamically. This service runs as an MCP server itself and spawns/manages other MCP servers as child processes, enabling a robust and flexible MCP ecosystem.

🔄 Enhanced Version

This is an enhanced and improved version of tesla0225/mcp-create with significant improvements and new features.

🌟 Key Features

• Dynamic MCP Server Creation: Create and run MCP server code on-the-fly
• Multi-Language Support: TypeScript, JavaScript, and Python server templates
• Parameter Validation: Strict JSON Schema validation with proper MCP error codes (-32602)
• Server Persistence: Save/load/delete servers to/from disk
• Tool Execution: Execute tools on child MCP servers with validation
• Server Management: Update, restart, and delete servers as needed
• Robust Python Support: Fixed Python server stability issues

🔧 Recent Improvements

✨ New Features

• MCP Parameter Validation: Strict validation with proper error codes (-32602 for invalid parameters)
• Server Persistence: Save servers to disk and reload them later
• Enhanced Python Support: Fixed Python server stability and closure issues
• Better Error Handling: Improved error messages and MCP compliance

🐛 Bug Fixes

• Fixed Python servers closing immediately after creation
• Corrected pip installation to use python3 -m pip
• Fixed duplicate process spawning issues
• Improved EOF handling in Python templates
• Better signal handling and graceful shutdown

🔄 Differences from Original

This enhanced version provides significant improvements over the original mcp-create:

Original Project: tesla0225/mcp-create

📦 Installation

Note: Docker is the recommended method for running this service

Docker Installation (Recommended)

# Build the Docker image
docker build -t mcp-create .

# Run the Docker container
docker run -it --rm mcp-create

Manual Installation

# Clone the repository
git clone https://github.com/PlumyCat/mcp-create-enhanced.git
cd mcp-create-enhanced

# Install dependencies
npm install

# Build
npm run build

# Run
npm start

Testing Local Installation

After making changes to the code, you can test locally:

# Rebuild after changes
npm run build

# Test the server directly (it will wait for MCP protocol input)
npm start

# Or test with a simple echo command
echo '{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}' | npm start

Using Local Version with Claude Desktop

To use your modified local version with Claude Desktop, update your claude_desktop_config.json:

{
  "mcpServers": {
    "mcp-create-local": {
      "command": "node",
      "args": ["./build/index.js"],
      "cwd": "/path/to/your/mcp-create-enhanced"
    }
  }
}

Note: Replace /path/to/your/mcp-create-enhanced with the actual path to your local repository.

Building Docker Image with Local Changes

To create a Docker image with your local changes:

# Build Docker image with your changes
docker build -t mcp-create-local .

# Test the Docker image
docker run -it --rm mcp-create-local

# Use with Claude Desktop
# Update claude_desktop_config.json:
{
  "mcpServers": {
    "mcp-create-local": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "mcp-create-local"]
    }
  }
}

🤖 Claude Desktop Integration

Add the following to your Claude Desktop configuration file (claude_desktop_config.json):

{
  "mcpServers": {
    "mcp-create": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "mcp-create"]
    }
  }
}

🛠️ Available Tools

📋 Usage Examples

Creating a New Server

{
  "name": "create-server-from-template",
  "arguments": {
    "language": "python",
    "code": "# Custom Python MCP server code here"
  }
}

Executing a Tool with Validation

{
  "name": "execute-tool",
  "arguments": {
    "serverId": "ba7c9a4f-6ba8-4cad-8ec8-a41a08c19fac",
    "toolName": "echo",
    "args": {
      "message": "Hello, dynamic MCP server!"
    }
  }
}

Parameter Validation Example

If you try to execute a tool with missing required parameters:

{
  "name": "execute-tool",
  "arguments": {
    "serverId": "ba7c9a4f-6ba8-4cad-8ec8-a41a08c19fac",
    "toolName": "echo",
    "args": {}
  }
}

You'll get a proper MCP error response:

{
  "jsonrpc": "2.0",
  "error": {
    "code": -32602,
    "message": "Invalid parameters: Missing required parameter: 'message'"
  }
}

🔄 Complete Workflow After Modifications

1. Make your changes in the source code
2. Rebuild Docker: docker build -t mcp-create-local .
3. Test: docker run -it --rm mcp-create-local
4. Update Claude Desktop configuration if needed

💡 Practical Tips

• Different tag: If you want to keep the old version, use a different tag:

  docker build -t mcp-create-local:v2 .
  

• Cleanup: Remove unused old images:

  docker image prune
  

• Verification: List your images to confirm:

  docker images | grep mcp-create
  

🏗️ Technical Specifications

• Node.js 18 or higher
• TypeScript (required)
• Dependencies:
  • @modelcontextprotocol/sdk: MCP client/server implementation
  • child_process (Node.js built-in): Child process management
  • fs/promises (Node.js built-in): File operations
  • uuid: Unique server ID generation
  • zod: JSON schema validation

🔒 Security Considerations

• Code Execution Restrictions: Consider sandboxing as the service executes arbitrary code
• Resource Limitations: Set limits on memory, CPU usage, file count, etc.
• Process Monitoring: Monitor and forcefully terminate zombie or runaway processes
• Path Validation: Properly validate file paths to prevent directory traversal attacks
• Parameter Validation: All tool parameters are validated against JSON schemas before execution

🧪 Testing

The project includes comprehensive validation for MCP parameters:

• ✅ Valid parameters: Normal execution
• ✅ Missing required parameters: Returns MCP error -32602 with explicit message
• ✅ Wrong parameter types: Returns MCP error -32602 with type details
• ✅ Unknown tools: Returns MCP error -32601
• ✅ Optional parameters: Handled correctly

📄 License

MIT

🤝 Contributing

Feel free to submit issues and pull requests. This project has been enhanced with Claude Code assistance to provide robust MCP server management capabilities.

🧪 Generated with Claude Code

Co-Authored-By: Claude