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MCP-YNU - FastMCP Server

A dynamic MCP server implementation using FastMCP that automatically loads tools, resources, and prompts from respective directories.

Features

Dynamic loading of modules from tools/, resources/, and prompts/ directories
Automatic discovery and registration of modules
Simple configuration and extensibility
Type hints for better code clarity and static analysis
Comprehensive logging for monitoring server activity

Recent Updates

Added type hints throughout the codebase
Improved MCP instance handling
Added logging functionality
Added MIT license
Updated documentation with reference links

Directory Structure

mcp-ynu/
├── tools/          # Directory for tool modules
│   ├── __init__.py
│   ├── example.py
├── resources/      # Directory for resource modules
│   ├── __init__.py
│   ├── example.py
├── prompts/        # Directory for prompt modules
│   ├── __init__.py
│   ├── example.py
├── logger.py       # Logger implementation
├── main.py         # Main implementation
├── mcp_server.py   # MCP server implementation
├── README.md       # Project documentation
├── LICENSE         # MIT License
└── pyproject.toml  # Project configuration

Usage

Create modules in the appropriate directories
Import mcp via from mcp_server import mcp
Run the server:

python main.py

Example Modules

Tools Module Example (tools/example.py)

from mcp_server import mcp
import httpx

@mcp.tool()
def calculate_bmi(weight_kg: float, height_m: float) -> float:
    """Calculate BMI given weight in kg and height in meters"""
    return weight_kg / (height_m**2)


@mcp.tool()
async def fetch_weather(city: str) -> str:
    """Fetch current weather for a city"""
    async with httpx.AsyncClient() as client:
        response = await client.get(f"https://api.weather.com/{city}")
        return response.text

Resources Module Example (resources/example.py)

from mcp_server import mcp

@mcp.resource("config://app")
def get_config() -> str:
    """Static configuration data"""
    return "App configuration here"


@mcp.resource("users://{user_id}/profile")
def get_user_profile(user_id: str) -> str:
    """Dynamic user data"""
    return f"Profile data for user {user_id}"

Prompts Module Example (prompts/example.py)

from mcp_server import mcp
from mcp.server.fastmcp.prompts import base

@mcp.prompt()
def review_code(code: str) -> str:
    return f"Please review this code:\n\n{code}"


@mcp.prompt()
def debug_error(error: str) -> list[base.Message]:
    return [
        base.UserMessage("I'm seeing this error:"),
        base.UserMessage(error),
        base.AssistantMessage("I'll help debug that. What have you tried so far?"),
    ]

Debugging

Update MCP_TRANSPORT_TYPE in .env, Execute python main.py to start the mcp server
Execute npx @modelcontextprotocol/inspector to open the inspect.
Choose SSE Transport Type with URL http://localhost:<mcp_server_port>/sse or Choose STDIO Transport Type with Command python and Arguments /path/to/main.py

@modelcontextprotocol/inspector

Requirements

Python >= 3.10
FastMCP

Reference Links

License

This project is licensed under the MIT License - see the LICENSE file for details.