get_forecast
Retrieve weather forecast data for a specific location by providing latitude and longitude coordinates through Slim MCP’s RESTful API.
Instructions
Get weather forecast for a location.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| latitude | Yes | ||
| longitude | Yes |
Implementation Reference
- src/claude_tools/weather.py:44-69 (handler)The handler function that implements the get_forecast tool. It fetches the weather forecast from the National Weather Service API for the given latitude and longitude, formats the next 5 periods, and returns a formatted string.async def get_forecast(latitude: float, longitude: float) -> str: """Get weather forecast for a location.""" # First get the forecast grid endpoint points_url = f"{NWS_API_BASE}/points/{latitude},{longitude}" points_data = await make_nws_request(points_url) if not points_data: return "Unable to fetch forecast data for this location." # Get the forecast URL from the points response forecast_url = points_data["properties"]["forecast"] forecast_data = await make_nws_request(forecast_url) if not forecast_data: return "Unable to fetch detailed forecast." # Format the periods into a readable forecast periods = forecast_data["properties"]["periods"] forecasts = [] for period in periods[:5]: # Only show next 5 periods forecast = f""" {period['name']}: Temperature: {period['temperature']}°{period['temperatureUnit']} Wind: {period['windSpeed']} {period['windDirection']} Forecast: {period['detailedForecast']} """ forecasts.append(forecast) return "\n---\n".join(forecasts)
- src/claude_tools/weather.py:71-75 (registration)The registration of the get_forecast tool using mcp.tool() decorator within the register_weather_tools function.def register_weather_tools(mcp): """Register all weather tools with the MCP server.""" mcp.tool()(get_alerts) mcp.tool()(get_forecast)
- src/claude_tools/weather.py:44-44 (schema)Input schema defined by type hints: latitude (float), longitude (float); output str.async def get_forecast(latitude: float, longitude: float) -> str:
- src/claude_tools/weather.py:8-20 (helper)Helper function used by get_forecast to make API requests to NWS.async def make_nws_request(url: str) -> dict[str, Any] | None: """Make a request to the NWS API with proper error handling.""" headers = { "User-Agent": USER_AGENT, "Accept": "application/geo+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