gistfile1.txt

#!/usr/bin/env -S uv run

# /// script
# dependencies = ["fastmcp", "httpx"]
# ///

"""
MCP server exposing weather tool using FastMCP.
"""

from fastmcp import FastMCP
import httpx

# Initialize the FastMCP server
mcp = FastMCP("WeatherTool")


@mcp.tool()
def get_weather(
    city: str,
    country: str = "",
    scale: str = "celsius"
) -> str:
    """
    Fetch current weather information for a specified location.
    
    Args:
        city: The city name (e.g., "Seattle", "Tokyo")
        country: Optional country name (e.g., "USA", "Japan")
        scale: Temperature scale - "celsius" or "fahrenheit" (default: "celsius")
    
    Returns:
        A string describing the current weather conditions.
    """
    try:
        # wttr.in accepts location as "city,country" or just "city"
        location = f"{city},{country}" if country else city
        url = f"https://wttr.in/{location}?format=j1"
        
        response = httpx.get(url, timeout=10.0)
        response.raise_for_status()
        data = response.json()
        
        # Extract current weather from the API response
        current = data["current_condition"][0]
        temp_c = float(current["temp_C"])
        temp_f = float(current["temp_F"])
        condition = current["weatherDesc"][0]["value"]
        humidity = current["humidity"]
        
        # Use the requested scale
        if scale.lower() == "fahrenheit":
            temp = temp_f
            temp_unit = "°F"
        else:
            temp = temp_c
            temp_unit = "°C"
        
        location_display = f"{city}, {country}" if country else city
        return f"The weather in {location_display} is {temp:.1f}{temp_unit} ({condition}). Humidity: {humidity}%."
    except httpx.HTTPError as e:
        return f"Error fetching weather data: {e}"
    except (KeyError, ValueError) as e:
        return f"Error parsing weather data: {e}"


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