MCP FastMCP Demo Server
A simple demonstration MCP server built with FastMCP that provides basic functionality including an addition tool, dynamic greeting resources, and user greeting prompts over STDIO.
README
MCP FastMCP Demo Server
This project is a simple MCP (Model Context Protocol) server built using FastMCP.
It exposes:
- A tool (
add) - A dynamic resource (
greeting://{name}) - A prompt (
greet_user)
The server is designed to run over STDIO and can be inspected using the MCP Inspector UI.
📦 Prerequisites
Make sure you have the following installed:
All Platforms
- Python 3.9+
- Node.js 18+
- npm (comes with Node.js)
Check versions:
python --version
node --version
npm --version
🐍 Python Setup
1️⃣ Create a virtual environment (recommended)
Linux / macOS
python3 -m venv .venv
source .venv/bin/activate
Windows (PowerShell)
python -m venv .venv
.venv\Scripts\Activate.ps1
2️⃣ Install dependencies
pip install -r requirements.txt
(If using uv, make sure it’s already configured.)
▶️ Running the MCP Server with Inspector The MCP Inspector will start the server and connect to it automatically using STDIO.
Linux / macOS / Windows
npx @modelcontextprotocol/inspector python server.py
This will: Launch the Inspector UI Spawn python server.py and Connect via STDIO automatically.
📍 Inspector UI opens at:
http://localhost:5173 🧪 Verifying the Connection.
Once connected in the Inspector UI:
Tools
- add(a: int, b: int) → int
- Resources
- greeting://{name}
- Prompts
- greet_user
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