DWD Server

An MCP server (Model Context Protocol) for weather data from the German Weather Service (DWD) via Bright Sky API.

Features

• Current Weather (get_current_weather) - Temperature, wind, precipitation, cloud cover, etc.
• Weather Forecast (get_weather_forecast) - Hourly forecasts and daily summaries
• Weather Alerts (get_weather_alerts) - Official DWD warnings (storm, thunderstorm, frost, etc.)
• Weather Stations (find_weather_station) - Find nearest DWD stations

Installation

With uv (recommended)

# Clone repository
git clone https://github.com/your-username/dwd-mcp-server.git
cd dwd-mcp-server

# Install dependencies
uv sync

# Development dependencies (optional)
uv sync --extra dev

With pip

pip install -e .

# With development dependencies
pip install -e ".[dev]"

Usage

Start as MCP server

# With uv
uv run dwd-mcp-server start

# Or directly with Python
python -m dwd_mcp_server.cli start

Integrate with Claude Desktop

Add the following configuration to your Claude Desktop config.json:

{
  "mcpServers": {
    "dwd-weather": {
      "command": "uv",
      "args": ["--directory", "/path/to/dwd-mcp-server", "run", "dwd-mcp-server", "start"]
    }
  }
}

Integrate with Claude Code

claude mcp add dwd-weather -- uv --directory /path/to/dwd-mcp-server run dwd-mcp-server start

MCP Tools

get_current_weather

Get current weather for a location.

Parameters:

• location (string, required): City name (e.g., "Aachen", "Munich") or coordinates (e.g., "50.7753,6.0839")

Example response:

{
  "timestamp": "Sat, 15.02.2026 14:00",
  "temperature_c": 8.2,
  "feels_like_c": 5.5,
  "humidity_percent": 78,
  "wind_speed_kmh": 22.3,
  "wind_direction": "W",
  "precipitation_mm": 0.0,
  "cloud_cover_percent": 75,
  "condition": "cloudy",
  "station_name": "Aachen-Orsbach"
}

get_weather_forecast

Get weather forecast for a location.

Parameters:

• location (string, required): City name or coordinates
• days (integer, optional): Number of days (1-10, default: 3)

Returns: Hourly data and daily summaries with min/max temperatures.

get_weather_alerts

Get official weather alerts.

Parameters:

• location (string, optional): City name or coordinates. If omitted: all alerts for Germany.

Returns: List of active alerts with type, severity, description, and validity period.

find_weather_station

Find nearest DWD weather stations.

Parameters:

• location (string, required): City name or coordinates

Returns: List of stations with name, ID, and distance.

Geocoding

The server accepts various location inputs:

1. Direct coordinates: "50.7753,6.0839" or "50.7753, 6.0839"
2. German cities: "Aachen", "Munich", "Cologne" (approx. 100 cities included)
3. Nominatim fallback: For unknown locations, OpenStreetMap/Nominatim is queried

Tests

# With uv
uv run pytest

# With pytest directly
pytest

Technology Stack

• MCP Framework: mcp Python SDK (FastMCP)
• HTTP Client: httpx (async)
• Data Source: Bright Sky API (DWD Open Data)
• Geocoding: Built-in city table + Nominatim fallback

License

MIT

Data Sources

• Weather data: DWD Open Data
• API: Bright Sky
• Geocoding: Nominatim/OpenStreetMap