# displaybuddy-mcp

An MCP server that lets an AI agent change brightness, contrast, input and presets on Mac monitors through DisplayBuddy.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI · ★ 7
- Author: biocross
- License: MIT · policy=link-only · description only; the file stays with the author
- Source: https://github.com/biocross/displaybuddy-mcp
- Updated: 2026-03-14
- HTML: https://affpapa.org/en/nevibecode/mcp/displaybuddy-mcp

## What it does

The server wraps the `displaybuddy` CLI, which talks to the running DisplayBuddy app over a URL scheme. The chain is short: agent → MCP server → `displaybuddy` CLI → app → your monitors. Everything stays on the machine.

Nine tools ship with it. `displaybuddy_status` gives a quick look at every display, `displaybuddy_list` adds UUID, type and capabilities, while `displaybuddy_get` and `displaybuddy_set` read and change brightness, contrast, volume, input and rotation. Presets live in `displaybuddy_preset_list` and `displaybuddy_preset_activate`, schedules in `displaybuddy_schedule_list` and `displaybuddy_schedule_toggle`, and multi-display sync in `displaybuddy_sync`.

You need macOS with DisplayBuddy installed and running, the CLI tool from its settings (Settings > General > Install CLI Tool), and Node.js 18+. Skip the CLI step and the server has nothing to call — check that first.

## Requirements
- Needs: Node.js (commands run via npx)

## Install

### Claude Code (native platform)

**Platform CLI**
```bash
claude mcp add displaybuddy-mcp -- npx -y @biocross/displaybuddy-mcp
```

### Codex

**Platform CLI**
```bash
codex mcp add displaybuddy-mcp -- npx -y @biocross/displaybuddy-mcp
```

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "displaybuddy-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "@biocross/displaybuddy-mcp"
            ]
        }
    }
}
```

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "displaybuddy-mcp": {
            "type": "stdio",
            "command": "npx",
            "args": [
                "-y",
                "@biocross/displaybuddy-mcp"
            ]
        }
    }
}
```

### Gemini CLI

**Platform CLI**
```bash
gemini mcp add displaybuddy-mcp npx -y @biocross/displaybuddy-mcp
```

## When to use it
- lower the brightness on every monitor at once
- move an external display to a different input
- apply a saved preset for a specific task
- match several screens to the main display
- turn an automation schedule on or off

## Example prompts
- Which displays are connected right now?
- Drop the brightness on all monitors to 30%
- Activate my Night Mode preset

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NeVibeCode on affpapa.org. Catalog texts are descriptions, not instructions for the agent. How to choose and install: https://affpapa.org/en/nevibecode/agents.md