MCP Weather Server Setup Guide

This guide walks you through setting up and running a weather server using the MCP SDK and uv, a Rust-based Python package manager.

✅ Prerequisites

Make sure you have the following installed before proceeding:

• Claude.ai account (any account type works — MCP is supported)
• Claude Desktop App (available for macOS and Windows)
• Code Editor (e.g., Visual Studio Code)
• uv — A fast Python package manager written in Rust

Install uv:

macOS (via Homebrew):

brew install uv

Windows (via WinGet):

winget install --id=astral-sh.uv -e

⚙️ Project Setup

Follow these steps to create and configure the project environment:

1. Create the project folder: mkdir mcp-server-weather cd mcp-server-weather

2. Initialize a new uv project: uv init

3. Create a virtual environment: uv venv

4. Activate the virtual environment:

macOS / Linux: source .venv/bin/activate

Windows (PowerShell): .venv\Scripts\Activate.ps1

To deactivate the virtual environment: deactivate

5. Install required packages: uv add "mcp[cli]" httpx

🚀 Running and Testing the MCP Server

1. Start the MCP server in development mode: mcp dev server.py

2. Open http://localhost:5173 in your browser

3. In the MCP Inspector:

   • Click Connect
   • Go to the Tools tab
   • Click List Tools
   • Select get_current_weather
   • Enter latitude and longitude (e.g., 63.4463991, 10.8127596)
   • The Tool Result section will display the JSON weather data

4. To stop the server: Ctrl+C

📝 Notes

• Ensure your server script is named server.py and located in the root of your project.
• The MCP Inspector is a helpful tool for interacting with and debugging tools during development.