Lutron Caseta MCP Server

A Model Context Protocol (MCP) server for controlling Lutron Caseta smart lights and devices. Powered by pylutron-caseta. This server allows AI assistants to interact with your Lutron Caseta bridge to control lights, check device status, and manage your smart home lighting.

Features

• Device Control: Turn lights on/off and set dimmer levels
• Device Discovery: List all lights and devices connected to your bridge
• Hybrid Pairing: Support for both standalone pairing utility and MCP tool-based pairing
• Type Safety: Full type hints for better development experience
• Error Handling: Robust error handling with clear error messages

Prerequisites

• Python 3.10 or higher
• uv package manager
• Lutron Caseta bridge connected to your network
• Network access to your Lutron Caseta bridge

No manual installation required - uv will handle everything automatically when you configure Claude Desktop.

Setup

1. Find Your Bridge IP Address

You need to find the IP address of your Lutron Caseta bridge on your network. You can:

• Check your router's device list
• Use a network scanner app
• Check the Lutron Caseta app settings

2. Pair with Your Bridge

You have two options for pairing:

Option A: MCP Tool Pairing (Recommended)

Start the MCP server and use the pair_bridge_tool through Claude. Simply ask Claude to "pair with my Lutron bridge at 192.168.1.100" and Claude will guide you through the process.

Option B: Standalone Pairing Utility

# Run the pairing utility
uv run --with lutron-caseta-mcp lutron-caseta-pair 192.168.1.100

# Or specify a custom directory for certificates
uv run --with lutron-caseta-mcp lutron-caseta-pair 192.168.1.100 ./certificates

For both options:

1. When prompted, press the small black button on the back of your Lutron Caseta bridge
2. You have 30 seconds to press the button after the prompt appears
3. Three certificate files will be created:
   • caseta-bridge.crt (CA certificate)
   • caseta.crt (Client certificate)
   • caseta.key (Private key)

3. Configure Environment Variables

Set the required environment variables:

export LUTRON_BRIDGE_IP=192.168.1.100
export LUTRON_CERT_DIR=./certificates  # Optional, defaults to current directory

Usage

Available MCP Tools

The server provides the following tools that can be called by MCP clients:

pair_bridge_tool(host: str, output_dir: str = ".")

Pair with a Lutron Caseta bridge and save certificates.

Parameters:

• host: IP address of the bridge
• output_dir: Directory to save certificate files (optional)

Returns:

• Success status, message, and certificate file paths

check_connection()

Check connection status and certificate files.

Returns:

• Bridge IP, certificate directory, certificate status, and connection status

list_devices(domain: str = "light")

List all devices in the specified domain.

Parameters:

• domain: Device domain to list (default: "light")

Returns:

• List of devices with their IDs, names, and capabilities

turn_on_device(device_id: str)

Turn on a device by ID.

Parameters:

• device_id: The device ID to turn on

Returns:

• Device ID, action performed, and success status

turn_off_device(device_id: str)

Turn off a device by ID.

Parameters:

• device_id: The device ID to turn off

Returns:

• Device ID, action performed, and success status

set_device_level(device_id: str, level: int)

Set device level (0-100) for dimmers.

Parameters:

• device_id: The device ID to control
• level: Brightness level (0-100)

Returns:

• Device ID, action performed, level set, and success status

Example Usage with Claude Desktop

Add this to your Claude Desktop MCP configuration:

{
  "mcpServers": {
    "lutron-caseta": {
      "command": "uv",
      "args": ["run", "--with", "lutron-caseta-mcp", "lutron-caseta-mcp"],
      "env": {
        "LUTRON_BRIDGE_IP": "192.168.1.100",
        "LUTRON_CERT_DIR": "/path/to/certificates"
      }
    }
  }
}

Note: If you encounter Python version errors, you may need to specify a Python version by adding "--python", "3.12" to the args array:

{
  "mcpServers": {
    "lutron-caseta": {
      "command": "uv",
      "args": ["run", "--python", "3.12", "--with", "lutron-caseta-mcp", "lutron-caseta-mcp"],
      "env": {
        "LUTRON_BRIDGE_IP": "192.168.1.100",
        "LUTRON_CERT_DIR": "/path/to/certificates"
      }
    }
  }
}

Then you can ask Claude to:

• "Turn on the living room lights"
• "Set the bedroom lights to 50% brightness"
• "List all my lights"
• "Turn off all the lights in the kitchen"

Troubleshooting

Connection Issues

1. Certificate files not found: Run the pairing utility first
2. Bridge connection failed: Check that the bridge IP is correct and reachable
3. Pairing timeout: Make sure to press the bridge button within 30 seconds

Common Error Messages

• "Not connected to Lutron Caseta bridge": The server couldn't connect to your bridge. Check the IP address and certificate files.
• "Certificate files not found": Run the pairing process first.
• "Pairing failed": The bridge button wasn't pressed in time, or there was a network issue.

Debug Mode

For more detailed logging, you can modify the server to enable debug mode or check the console output when running the server.

Development

For development, clone the repository and install in development mode:

git clone https://github.com/dgalarza/lutron-caseta-mcp.git
cd lutron-caseta-mcp
uv sync

Running Tests

uv run pytest

Code Structure

• src/lutron_caseta_mcp/server.py: Main MCP server implementation
• src/lutron_caseta_mcp/pairing.py: Pairing utilities and standalone pairing tool
• src/lutron_caseta_mcp/validation.py: Input validation utilities

Requirements

• mcp>=1.0.0: Model Context Protocol implementation
• pylutron-caseta>=0.10.0: Lutron Caseta bridge communication

License

MIT License

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Add tests if applicable
5. Submit a pull request

Security Notes

• Certificate files contain sensitive authentication data
• Keep certificate files secure and don't commit them to version control
• The .gitignore file is configured to exclude certificate files
• Consider storing certificates in a secure location outside the project directory