System & Media Control MCP Client/Server (Windows)

A Node.js-based Model Context Protocol (MCP) automation system that enables Artificial Intelligence (Google Gemini, OpenAI, Anthropic Claude, or Local AI models like Ollama/LM Studio) to query and control your Windows PC using natural language.

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📖 Table of Contents

1. Features
2. How It Works
3. Prerequisites
4. Installation & Setup
5. Configuration
6. Usage
7. Available Tools (30 total)

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🌟 Features

💻 System & Resource Monitoring

• get_system_status: CPU load, RAM usage, primary disk (C:) free capacity, and system uptime.
• get_system_info: Retrieve detailed static system hardware specifications (CPU, motherboard, RAM slots, OS, BIOS).
• get_disk_space: Returns storage space metrics (total, used, free) for all active system drives.
• get_top_processes: Top 5 CPU-intensive running processes with PIDs and CPU percentages.
• get_battery_status: Battery health percentage, charging state, and estimated remaining minutes (laptops).
• get_network_info: Retrieves local IPv4 addresses, active network adapters, and external IP.
• get_dns_servers: Retrieves configured DNS server IP addresses for the active network interfaces.
• get_network_latency: Test latency (ping response time) to major targets (e.g. google.com).
• get_wifi_networks: Scans and lists nearby Wi-Fi network SSIDs and signal strengths.
• get_wifi_status: Retrieves status details of the currently active Wi-Fi connection (SSID, Signal quality, Transmission rate).
• get_active_window: Retrieves the title, process name, and PID of the currently active focused foreground window.
• get_gpu_info: GPU graphics card details, driver versions, and VRAM memory.
• get_audio_devices: Lists available system output and input audio hardware controllers.

🎛 PC & Media Control

• media_control: Simulates keyboard media keys (Play/Pause, Next Track, Previous Track, Stop).
• get_volume / set_volume / set_mute: Checks system volume level, sets level (0-100), and mutes/unmutes audio.
• get_brightness / set_brightness: Reads or changes monitor brightness (0-100%).
• system_power_control: Locks the screen, puts the PC to sleep, schedules a shutdown/restart (with a 60s warning), or aborts active power schedules.
• close_process: Force terminates a running background/foreground process by name or process ID.

📋 Automation & Clipboard Utilities

• get_clipboard: Reads text contents currently on the Windows clipboard.
• set_clipboard: Copies a text string to the system clipboard.
• clear_clipboard: Clears all text contents currently on the Windows clipboard.
• open_url: Launches a website URL in the default or a specified browser (Chrome, Firefox, Edge, Brave).
• send_keystrokes: Sends sequential keyboard commands and inputs to automate apps and pages.
• launch_app: Spawns a desktop application by command name (e.g. notepad, calc, explorer).
• take_screenshot: Captures a PNG screenshot of the primary screen and saves it locally.
• empty_recycle_bin: Empties the Windows Recycle Bin.
• show_desktop: Minimizes all active GUI windows instantly.

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⚙️ How It Works

graph TD
    User([User Prompt]) --> Client[MCP Client - client.js]
    Client -->|1. Prompt + Tools| LLM[AI Provider: Gemini/OpenAI/Claude/Ollama]
    LLM -->|2. Tool Call Request| Client
    Client -->|3. JSON-RPC over stdin| Server[MCP Server - server.js]
    Server -->|4. Runs Native Powershell/C#| WinAPI[Windows Core Audio / CIM / Clipboard]
    WinAPI -->|5. Output| Server
    Server -->|6. JSON-RPC over stdout| Client
    Client -->|7. Tool Response| LLM
    LLM -->|8. Natural Language Answer| Client
    Client --> Display([Console Display])

1. Background Spawn: The client runs as a Node.js process and spawns the MCP server as a background process (child_process.spawn).
2. JSON-RPC handshake: During startup, they perform a line-by-line handshake over stdin and stdout using JSON-RPC 2.0.
3. AI routing: The client prompts your chosen AI provider with the user prompt and the server's tools list.
4. Tool Call Interception: When the AI responds with a Tool Call request, the client intercepts it, translates it to a tools/call JSON-RPC message, and forwards it to the server's stdin.
5. Windows Integration: The server runs native PowerShell command scripts, compiling on-the-fly C# interfaces to bypass the COM binder inside PowerShell, interacting directly with core APIs and user32 keyboard emulation.
6. Result Loop: The tool result is returned over stdout to the client, which feeds it back to the AI. The AI then formulates a final user response.
7. Interactive loop: When executed without argument, the client enters a continuous loop where you can chat with the PC Agent.

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💻 Prerequisites

• Operating System: Windows (required for CIM, user32, and COM audio objects).
• Runtime: Node.js v18 or higher.

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📦 Installation & Setup

1. Clone this repository:

   git clone https://github.com/noackjona-hash/system-media-control-mcp.git
   cd system-media-control-mcp
   

2. Install npm packages:

   npm install
   

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⚙️ Configuration

Create a file named .env in the root folder (automatically ignored by git) and set your preferred AI provider:

# Choose AI Provider: gemini, openai, anthropic, groq, github, deepseek, mistral, together, openrouter, watsonx, perplexity, nvidia, local, mock, etc.
AI_PROVIDER=gemini

# Google Gemini API
GEMINI_API_KEY=AIzaSy...
GEMINI_MODEL=gemini-2.5-flash

# OpenAI API
OPENAI_API_KEY=sk-...
OPENAI_MODEL=gpt-4o-mini

# Anthropic Claude API
ANTHROPIC_API_KEY=sk-ant-...
ANTHROPIC_MODEL=claude-3-5-sonnet-20241022

# Groq AI API
GROQ_API_KEY=gsk_...
GROQ_MODEL=llama-3.3-70b-versatile

# GitHub Models API
GITHUB_TOKEN=ghp_...
GITHUB_MODEL=gpt-4o

# Other supported providers (DeepSeek, Mistral, Together, OpenRouter, Watsonx, Perplexity, Cloudflare, Nebius, NVIDIA NIM, Upstage, Moonshot, etc.)
DEEPSEEK_API_KEY=sk-...
MISTRAL_API_KEY=sk-...
PERPLEXITY_API_KEY=pplx-...

# Local AI / Ollama / LM Studio (OpenAI-compatible)
LOCAL_API_BASE=http://localhost:11434/v1
LOCAL_MODEL=llama3.2:1b

(If no API keys are found or configured, it defaults to Mock Mode, running keyword analysis locally to simulate tool execution. Perfect for offline testing!)

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🚀 Usage

Continuous Interactive Chat Loop (Recommended)

Run the client with no arguments to start a persistent shell session:

npm start

You can chat continuously:

Ask PC Agent > How busy is my PC?
Ask PC Agent > Open github.com
Ask PC Agent > Mute the volume
Ask PC Agent > exit

CLI Command Mode (Single-Shot)

Pass your instruction directly as a command-line argument:

npm start "Show my desktop"
npm start "Copy 'Antigravity' to my clipboard"
npm start "Check the battery status"

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🛠 Available Tools

Tool Name	Parameters	Description
get_system_status	None	Returns CPU load, RAM usage (GB/%), C: disk space, and uptime.
get_top_processes	None	Returns the top 5 CPU consuming active processes.
get_battery_status	None	Returns charge level (%), charging status, and remaining time.
get_brightness	None	Gets current screen brightness percentage.
set_brightness	level (0-100)	Sets screen brightness to the specified level.
get_volume	None	Gets master volume (0-100) and mute status.
set_volume	level (0-100)	Sets master volume level.
set_mute	mute (boolean)	Mutes or unmutes system audio.
media_control	action (string)	Simulates keypress: play_pause, next_track, prev_track, stop.
system_power_control	action (string)	Performs power action: lock, sleep, shutdown, restart, abort_shutdown.
get_clipboard	None	Returns text content on the Windows clipboard.
set_clipboard	text (string)	Copies the text to the Windows clipboard.
open_url	url (string), browser (string)	Opens the URL in default or specified browser (chrome, firefox, edge, brave).
launch_app	app (string)	Launches the application (e.g. notepad).
get_network_info	None	Returns local IPs, network adapter name, external IP, and SSID.
show_desktop	None	Minimizes all active windows to show the desktop.
get_gpu_info	None	Returns GPU name, driver version, memory, and status.
get_audio_devices	None	Lists all active audio output and input devices.
close_process	target (string)	Force closes process by name or PID.
empty_recycle_bin	None	Empties the Windows Recycle Bin.
get_disk_space	None	Gets storage metrics (total, used, free) for all active drives.
take_screenshot	filename (string)	Captures primary display screenshot and saves it locally.
get_wifi_networks	None	Scans and lists nearby Wi-Fi network SSIDs and signal strengths.
get_system_info	None	Retrieves static system specs (Motherboard, CPU, RAM modules info).
get_wifi_status	None	Retrieves details of current Wi-Fi SSID, rate, and signal quality.
get_network_latency	target (string)	Tests latency (ping response time) to custom or default addresses.
clear_clipboard	None	Clears all text contents currently on the Windows clipboard.
get_dns_servers	None	Retrieves configured DNS server IP addresses for the network interface.
get_active_window	None	Retrieves the title, process name, and PID of the focused foreground window.
send_keystrokes	keys (array of strings)	Sends keystrokes to active window (type, tabs, enter, delays).