MCP-YNU FastMCP Server

from mcp_server import mcp import httpx import os api_key = os.getenv("OPENWEATHER_API_KEY") @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"http://api.openweathermap.org/data/2.5/weather?q={city}&appid={api_key}&units=metric") return response.text