🍋 LemonServer

The hardware monitor and FPS web server for Windows.

LemonServer is a lightweight utility that exposes real-time system stats and FPS data through a simple web server. It returns system information in JSON format, making it easy to integrate with dashboards, overlays, or remote monitoring tools.

📦 Features

• Displays real-time:
  • CPU and GPU temperatures
  • CPU and GPU loads
  • RAM and VRAM usage
  • Current FPS for the topmost application on the screen
• JSON API over HTTP
• Lightweight and easy to use
• No installation required
• Customizable port
• Perfect for game overlays, stream HUDs, or system dashboards

🖥️ Example JSON Output

{
  "cpuName": "11th Gen Intel Core i5-11400H",
  "gpuName": "NVIDIA GeForce RTX 3060 Laptop GPU",
  "totalMemory": 16235,
  "availableMemory": 2283,
  "cpuTemp": 72.3333359,
  "cpuLoad": 89.6999969,
  "gpuTemp": 71,
  "gpuLoad": 37.7296906,
  "gpuTotalVram": 6144,
  "gpuAvailVram": 1340,
  "currFps": 106.343132
}

🚀 Usage

• Starting the Server

# LemonServer.exe {port}

Replace {port} with your desired port number. Defaults to 8080 if no port is provided.

• Accessing the API

http://localhost:{port}

The server will respond with live system statistics in JSON format.

• Stopping the server

http://localhost:{port}/exit

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⚙️ Requirements

• Operating System: Windows only
• .NET Framework: Version 4.7.2 or higher

⚠️ Make sure you run LemonServer as Administrator