Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@weather-mcp-server are there any weather alerts in Florida?"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
An MCP (Model Context Protocol) server that gives Claude real-time weather data from the US National Weather Service API — no API key needed.
get_alerts — fetches active weather alerts for any US state
get_forecast — fetches a 5-period forecast for any lat/long location
Related MCP server: Weather MCP Server
Python 3.12+
uv
Clone the repo and install dependencies:
git clone https://github.com/YOUR_USERNAME/weather-mcp-server
cd weather-mcp-server
uv venv --python 3.12
source .venv/bin/activate
uv add "mcp[cli]" httpxAdd to ~/Library/Application Support/Claude/claude_desktop_config.json:
{
"mcpServers": {
"weather": {
"command": "uv",
"args": ["--directory", "/path/to/weather-mcp-server", "run", "weather.py"]
}
}
}Restart Claude Desktop. Look for the hammer icon in the chat input.
MCP Python SDK (https://github.com/modelcontextprotocol/python-sdk)
National Weather Service API (https://api.weather.gov)
Get weather alerts for a US state.
Args:
state: Two-letter US state code (e.g. CA, NY)
Inputs: state (required). Returns: result
Get weather forecast for a location.
Args:
latitude: Latitude of the location
longitude: Longitude of the location
Inputs: latitude (required), longitude (required). Returns: result
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
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Scored across 2 tools
The two tools have clearly distinct purposes: one for weather alerts by state, another for forecast by coordinates. No overlap in functionality.
Both tools follow a consistent verb_noun pattern (get_alerts, get_forecast), making the naming predictable and easy to understand.
With only two tools, the server feels minimal for a weather domain. While it covers two core functions, 2 tools is on the lower end of reasonable scope.
The server provides alerts and forecast but lacks current conditions, radar, or marine data, leaving notable gaps for a typical weather information service.
US NWS weather alerts and 5-day forecasts for AI agents. $0.01 per call.
Get US weather forecasts, active and recent alerts, and current observations.
Provide real-time and forecast weather information for locations in the United States using natura…
US weather & geo for AI agents: forecasts, alerts, earthquakes, elevation, geocoding. No keys.