Displaybuddy

An MCP (Model Context Protocol) server that lets AI agents control Mac monitors via DisplayBuddy — adjust brightness, contrast, volume, input source, apply presets, sync displays, and more.

Works with Claude Desktop, Cursor, Windsurf, Cline, and any MCP-compatible client.

Prerequisites

1. macOS with DisplayBuddy installed and running
2. DisplayBuddy CLI installed: open DisplayBuddy > Settings > General > Install CLI Tool
3. Node.js 18+

Installation

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "displaybuddy": {
      "command": "npx",
      "args": ["-y", "displaybuddy-mcp"]
    }
  }
}

Cursor

Add to your MCP settings:

{
  "mcpServers": {
    "displaybuddy": {
      "command": "npx",
      "args": ["-y", "displaybuddy-mcp"]
    }
  }
}

Smithery

npx -y @smithery/cli install displaybuddy-mcp --client claude

Available Tools

Tool	Description
displaybuddy_status	Quick overview of all displays (call this first)
displaybuddy_list	Full display details including UUID, type, capabilities
displaybuddy_get	Get properties of a specific display
displaybuddy_set	Set brightness, contrast, volume, input, rotation
displaybuddy_preset_list	List saved presets
displaybuddy_preset_activate	Activate a preset (with optional delay)
displaybuddy_schedule_list	List automation schedules
displaybuddy_schedule_toggle	Enable or disable a schedule
displaybuddy_sync	Check/enable/disable multi-display sync

Example Prompts

Once connected, you can ask your AI assistant things like:

• "Dim all my monitors to 30%"
• "What displays are connected?"
• "Switch my Dell monitor to HDMI"
• "Activate my Night Mode preset"
• "Sync all displays to my main monitor"
• "Turn up the brightness on my external display"
• "Set up my coding environment — brightness 70, contrast 60"

How It Works

The MCP server wraps the displaybuddy CLI, which communicates with the running DisplayBuddy app via URL scheme. All operations are local — no data leaves your machine.

AI Agent → MCP Server → displaybuddy CLI → DisplayBuddy App → Your Monitors

Development

npm install
npm run build

# Test with MCP Inspector
npx -y @modelcontextprotocol/inspector node ./build/index.js

License

MIT