Weather MCP Server

Instructions

Implementation Reference

• main.py:7-13 (handler)

  The handler function for the 'fetch_weather' tool, registered via @mcp.tool() decorator. It takes a location string and returns the weather by delegating to the get_weather helper.

  @mcp.tool()
  async def fetch_weather(location: str) -> str:
      
      """
      Get weather information for a given location
      """
      return get_weather(location)

• tools/weather.py:3-22 (helper)

  Helper function containing the core logic to fetch weather data from wttr.in API using urllib, with error handling.

  def get_weather(location:str) -> str:
  
      """
      fetches the weather for a given location, example: "London, new-york, San-francisco, etc."
  
      Args:
          location(str): the city or location name to fetch the weather for.
  
      Returns:
          str: a string containing the weather for the location    
      
      """
  
      try:
          url = f"https://wttr.in/{location}?format=3"
          with urllib.request.urlopen(url) as response:
              result = response.read().decode('utf-8').strip()
              return result
      except Exception as e:
          return f"Error fetching weather: {e}"