A simple and fast introduction to Model Context Protocol (MCP) servers! This project demonstrates how to create a basic MCP server with a simple math tool, perfect for learning MCP concepts without the complexity of inspector tools or npm dependencies.

This demo server provides a basic add function that can be called through the MCP protocol, showcasing the fundamental concepts of MCP server development.

• 🧮 Simple Math Tool: Basic addition functionality via MCP
• 🐍 Python-based: Built with FastMCP for easy development
• 🚀 UV Support: Modern Python package management with UV
• 🔧 CLI Testing: Test tools directly with mcp-tools-cli
• 🖥️ Claude Desktop Integration: Ready-to-use configs for both Windows and WSL
• 📦 Minimal Dependencies: Only essential packages required

Before you begin, ensure you have the following installed:

• Python 3.12+ 🐍
• UV (recommended) or pip 📦
• Claude Desktop (for GUI testing) 🖥️
• mcp-tools-cli (for CLI testing) 🔧

# Windows (PowerShell)
irm https://astral.sh/uv/install.ps1 | iex

# macOS/Linux
curl -LsSf https://astral.sh/uv/install.sh | sh

# Using UV
uvx mcp-tools-cli --help

# Using pip
pip install mcp-tools-cli

1. Clone and navigate to the project:

git clone git@github.com:DLesmes/mcp_server.git
cd mcp_server

2. Create virtual environment:

uv venv

3. Activate virtual environment:

# Windows
.venv\Scripts\activate

# macOS/Linux
source .venv/bin/activate

4. Install dependencies:

uv pip install -r requirements.txt

5. Run the server:

uv run python server.py

2. Create virtual environment:

python -m venv .venv

3. Activate virtual environment:

# Windows
.venv\Scripts\activate

# macOS/Linux
source .venv/bin/activate

4. Install dependencies:

pip install -r requirements.txt

5. Run the server:

python server.py

Test your MCP server using the command line interface.

uvx mcp-tools-cli list-tools --mcp-name local_demo --config-path .\mcp_config.json

uvx mcp-tools-cli call-tool --% --mcp-name local_demo --tool-name add --tool-args {"a":1,"b":2} --config-path .\mcp_config.json

uvx mcp-tools-cli call-tool --mcp-name local_demo --tool-name add --tool-args a=1,b=2 --config-path .\mcp_config.json

uvx mcp-tools-cli call-tool --% --mcp-name local_demo --tool-name add --tool-args {a:1,b:2} --config-path .\mcp_config.json

uvx mcp-tools-cli list-tools --mcp-name local_demo --config-path ./mcp_config.json

uvx mcp-tools-cli call-tool --mcp-name local_demo --tool-name add --tool-args '{"a":1,"b":2}' --config-path ./mcp_config.json

uvx mcp-tools-cli call-tool --mcp-name local_demo --tool-name add --tool-args 'a=1,b=2' --config-path ./mcp_config.json

uvx mcp-tools-cli call-tool --mcp-name local_demo --tool-name add --tool-args '{a:1,b:2}' --config-path ./mcp_config.json

For a more interactive experience, test your MCP server with Claude Desktop:

1. Configure Claude Desktop:

   • Copy the contents of claude_desktop_config_wd.json (Windows) or claude_desktop_config_wsl.json (WSL)
   • Update the file paths and API keys in the config
   • Add the config to your Claude Desktop settings

2. Start Claude Desktop and you'll see your MCP server available as a tool

3. Test the tool by asking Claude to use the add function:

   "Can you add 5 and 3 using the add tool?"
   

We welcome contributions! Here's how you can help:

1. Fork the repository 🍴
2. Create a feature branch 🌿

   git checkout -b feature/amazing-feature

3. Make your changes ✏️
4. Test your changes 🧪
5. Commit your changes 💾

   git commit -m "Add amazing feature"

6. Push to the branch 🚀

   git push origin feature/amazing-feature

7. Open a Pull Request 📝

• Keep it simple and educational 📚
• Add clear comments to code 💬
• Test all changes thoroughly ✅
• Update documentation as needed 📖

• Issues: GitHub Issues 🐛
• Discussions: GitHub Discussions 💬
• Email: your-email@example.com 📧

Happy MCP Development! 🎉

This project is designed to be a quick and easy introduction to MCP servers. Perfect for beginners who want to understand the basics without getting overwhelmed by complex tooling.