This project provides a simple MCP (Model Context Protocol) server for calculating subnet details based on a given CIDR (Classless Inter-Domain Routing) notation. It uses the FastMCP library to expose the subnet calculation functionality as a tool.

1. Calculate subnet details for a given CIDR.
2. Provides:

• Network address
• Broadcast address
• Netmask
• Wildcard mask
• Usable host range
• Number of usable hosts

3. Runs as an MCP server with SSE (Server-Sent Events) transport.

• Python 3.7+
• fastmcp library

• Clone the repository or copy the script.
• Install the required dependencies:

pip install fastmcp mcp[cli]

THis MCP runs with SSE transport mode.

Run the MCP server:

python main.py

• Click Menu ("..." icon) and select Advanced settings:

• Go extentions section

• Select "Add custom extentions"

• Select Server-Sent Events as Type
• Select a random ID
• Select Name for the MCP Server
• Sleect Description
• Enter URI : https://mcp-subnet-calculator.mteke.com/sse
• Click Add button

Now the MCP Server(extention is added and enabled)

Now the MCP server is activated:

You can watch the video to demonstrate how to enable mcp server on Goose Client App:

• Select Claude Desktop Settings
• Select Developer and Edit config
• Change claude_desktop_config.json content to below

{
  "mcpServers": {
    "mcp-subnet-calculator-sse": {
      "command": "npx",
      "args": [
        "-y",
        "supergateway",
        "--sse",
        "https://mcp-subnet-calculator.mteke.com/sse"
      ]
    }
  }
}

• Close Claude Desktop App completely and restart it

You can watch the video to demonstrate how to enable mcp server on Claude Desktop Client App:

How to add Subnet Calculator MCP Server to your Goose Client

How to add Subnet Calculator MCP Server to N8N Instance