MCP-Server

This repo includes instruction and code to set up a MCP (Model Context Protocol) Server and add tools to it and interact with it with an LLM (Large Language Model).

Intro about MCP

The Model Context Protocol (MCP) is a new, standardized way to provide context and tools to your LLMs. In this repo, we will use FastMCP which makes building MCP servers and clients simple and intuitive.

FastMCP 2.0 is the #1 github trending repo, with over 10k stars and 600 forks as of May 2025.

Create tools, expose resources, define prompts, and more with clean, Pythonic code:

from fastmcp import FastMCP

mcp = FastMCP("Demo 🚀")

@mcp.tool()
def add(a: int, b: int) -> int:
    """Add two numbers"""
    return a + b

if __name__ == "__main__":
    mcp.run()

What is MCP?

The Model Context Protocol lets you build servers that expose data and functionality to LLM applications in a secure, standardized way. It is often described as “the USB-C port for AI”, providing a uniform way to connect LLMs to resources they can use. It may be easier to think of it as an API, but specifically designed for LLM interactions.
MCP servers can:

• Expose data through Resources (think of these sort of like GET endpoints; they are used to load information into the LLM’s context)
• Provide functionality through Tools (sort of like POST endpoints; they are used to execute code or otherwise produce a side effect)
• Define interaction patterns through Prompts (reusable templates for LLM interactions)
• And more!
  There is a low-level Python SDK available for implementing the protocol directly, but FastMCP aims to make that easier by providing a high-level, Pythonic interface.

Why FastMCP?

The MCP protocol is powerful but implementing it involves a lot of boilerplate - server setup, protocol handlers, content types, error management. FastMCP handles all the complex protocol details and server management, so you can focus on building great tools. It’s designed to be high-level and Pythonic; in most cases, decorating a function is all you need.

While the core server concepts of FastMCP 1.0 laid the groundwork and were contributed to the official MCP SDK, FastMCP 2.0 (this project) is the actively developed successor, adding significant enhancements and entirely new capabilities like a powerful client library, server proxying, composition patterns, and much more.

FastMCP aims to be:

🚀 Fast: High-level interface means less code and faster development

🍀 Simple: Build MCP servers with minimal boilerplate

🐍 Pythonic: Feels natural to Python developers

🔍 Complete: FastMCP aims to provide a full implementation of the core MCP specification

Set up

We uv which, a rust package management tool, much faster than pip. If you don't have it already, install it:

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

The advantages of uv over Pipenv/Pipfile include:

• Faster dependency resolution and installation times.
• Better integration with modern Python ecosystems like Poetry.
• Reduced overhead in virtual environment management.
• Enhanced security when resolving environment variables, though this also introduces new considerations (discussed later).

You may need to update your $PATH to reflex where uv gets installed. Example for MacOS: /Users/<user>/.local/bin/

You can update your .bash_profile as follow:

# Setting PATH for uv
PATH="/Users/<user>/.local/bin/:${PATH}"
export PATH

Create a virtual environment To create a default virtual env that will go in .venv, run:

uv venv

Activate your environment

source .venv/bin/activate

Install the dependencies

uv add fastmcp==2.4.0 --frozen

Verify the version

fastmcp version

You should see something like that:

FastMCP version:                                                          2.4.0
MCP version:                                                              1.9.1
Python version:                                                          3.11.9
Platform:                                        macOS-15.4.1-x86_64-i386-64bit
FastMCP root path: /Users/Fab/Git/mcp-server/.venv/lib/python3.11/site-packages

---

Projects

MCP Server for extracting info from a Web Page from Amazon

This project demonstrates how to use FastMCP to build a simple MCP server and client with AI-assisted tool orchestration. The workflow operates as follows:

• The user sends a message like "Fetch product info from this Amazon link."
• The MCP client checks for a registered tool that can handle that task
• The client sends a structured request to the MCP server
• The MCP server executes the appropriate action (e.g., launching a headless browser)
• The server returns structured results to the MCP client
• The client forwards the results to the LLM, which presents them to the user

Features

This server offer two tools:

• fetch_page: to download HTML
• extract_info: extract organized information.

For more info see readme

Quickstart - FastMCP Server and Tools

See Quickstart - creating an server and tool

FastMCP Server

To Learn about the core FastMCP server class and how to run it, refer to: FastMCP server

FastMCP Client

To Learn about the core FastMCP server class and how to run it, refer to: FastMCP client

---

Usage

uv run main.py