server.py

from typing import Any

import httpx
from mcp.server.fastmcp import FastMCP

# initialize mcp server
mcp = FastMCP("weather")

OPEN_METEO_API_BASE_URL = "https://api.open-meteo.com/v1"
USER_AGENT = "weather-app/1.0"

async def make_open_meteo_request(url: str) -> dict[str, Any] |None:
    headers = {
        "User-Agent": USER_AGENT,
        "Accept": "application/json",
    }

    async with httpx.AsyncClient() as client:
        try:
            response = await client.get(url, headers=headers, timeout=30.0)
            response.raise_for_status()
            return response.json()
        except Exception:
            return None

@mcp.tool()
async def get_current_weather(latitude: float, longitude: float) -> str | dict[str, Any]:
    url = f"{OPEN_METEO_API_BASE_URL}/forecast?latitude={latitude}&longitude={longitude}&current=temperature_2m,is_day,showers,cloud_cover,wind_speed_10m,wind_direction_10m,pressure_msl,snowfall,precipitation,relative_humidity_2m,apparent_temperature,rain,weather_code,surface_pressure,wind_gusts_10m"

    data =  await make_open_meteo_request(url)
    if not data:
        return "No weather data available"
    return data

if __name__ == "__main__":
    mcp.run(transport='stdio')