MCP主机使用Cline

pip3 install uv -i https://mirrors.aliyun.com/pypi/simple/
Installing collected packages: uv
Successfully installed uv-0.7.8
[notice] A new release of pip is available: 23.2.1 -> 25.1.1
[notice] To update, run: python3.11 -m pip install --upgrade pip

 % uv --version
uv 0.7.8 (0ddcc1905 2025-05-23)

%uv init weather
Initialized project `weather` at `/Users/xiazemin/py/weather`

%uv venv
Using CPython 3.11.6 interpreter at: /usr/local/opt/python@3.11/bin/python3.11
Creating virtual environment at: .venv
Activate with: source .venv/bin/activate

% source .venv/bin/activate
(py)

% uv add "mcp[cli]" httpx  -i https://mirrors.aliyun.com/pypi/simple/
warning: Indexes specified via `--index-url` will not be persisted to the `pyproject.toml` file; use `--default-index` instead.
warning: `VIRTUAL_ENV=/Users/xiazemin/py/.venv` does not match the project environment path `.venv` and will be ignored; use `--active` to target the active environment instead
Resolved 29 packages in 2.76s
Prepared 27 packages in 2.44s
Installed 27 packages in 140ms
 + annotated-types==0.7.0
 + anyio==4.9.0
 + certifi==2025.4.26
 + click==8.1.8
 + h11==0.16.0
 + httpcore==1.0.9
 + httpx==0.28.1
 + httpx-sse==0.4.0
 + idna==3.10
 + markdown-it-py==3.0.0
 + mcp==1.9.1
 + mdurl==0.1.2
 + pydantic==2.11.5
 + pydantic-core==2.33.2
 + pydantic-settings==2.9.1
 + pygments==2.19.1
 + python-dotenv==1.1.0
 + python-multipart==0.0.20
 + rich==14.0.0
 + shellingham==1.5.4
 + sniffio==1.3.1
 + sse-starlette==2.3.5
 + starlette==0.46.2
 + typer==0.15.4
 + typing-extensions==4.13.2
 + typing-inspection==0.4.1
 + uvicorn==0.34.2

%uv add fastmcp  -i https://mirrors.aliyun.com/pypi/simple/
warning: Indexes specified via `--index-url` will not be persisted to the `pyproject.toml` file; use `--default-index` instead.
warning: `VIRTUAL_ENV=/Users/xiazemin/py/.venv` does not match the project environment path `.venv` and will be ignored; use `--active` to target the active environment instead
Resolved 33 packages in 1.02s
Prepared 4 packages in 371ms
Installed 4 packages in 43ms
 + exceptiongroup==1.3.0
 + fastmcp==2.5.0
 + openapi-pydantic==0.5.1
 + websockets==15.0.1

from typing import Any
import httpx
from mcp.server.fastmcp import FastMCP
# Initialize FastMCP server
mcp = FastMCP("weather")
# Constants
NWS_API_BASE = "https://api.weather.gov"
USER_AGENT = "weather-app/1.0"
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
def format_alert(feature: dict) -> str:
    """Format an alert feature into a readable string."""
    props = feature["properties"]
    return f"""
Event: {props.get('event', 'Unknown')}
Area: {props.get('areaDesc', 'Unknown')}
Severity: {props.get('severity', 'Unknown')}
Description: {props.get('description', 'No description available')}
Instructions: {props.get('instruction', 'No specific instructions provided')}
"""
@mcp.tool()
async def get_alerts(state: str) -> str:
    """Get weather alerts for a US state.
    Args:
        state: Two-letter US state code (e.g. CA, NY)
    """
    url = f"{NWS_API_BASE}/alerts/active/area/{state}"
    data = await make_nws_request(url)
    if not data or "features" not in data:
        return "Unable to fetch alerts or no alerts found."
    if not data["features"]:
        return "No active alerts for this state."
    alerts = [format_alert(feature) for feature in data["features"]]
    return "\n---\n".join(alerts)
@mcp.tool()
async def get_forecast(latitude: float, longitude: float) -> str:
    """Get weather forecast for a location.
    Args:
        latitude: Latitude of the location
        longitude: Longitude of the 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)
if __name__ == "__main__":
    # Initialize and run the server
    mcp.run(transport='stdio')

% uv run weather.py

{
  "mcpServers": {
    "weather": {
      "command": "uv",
      "args": [
          "--directory",
          "/Users/xiazemin/py/weather/",
          "run",
          "weather.py"
      ]
    }
  }
}

The weather alerts for Texas include the following:

1. __Heat Advisory__:

   - Area: Jim Wells; Inland Kleberg; Inland Nueces; Inland San Patricio
   - Severity: Moderate
   - Description: Heat index values up to 111 expected. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

2. __Flood Warning__:

   - Area: Angelina, Houston, Polk, Trinity, Tyler
   - Description: Minor flooding is forecast for the Neches River near Diboll. Do not drive cars through flooded areas and caution is advised when walking near riverbanks.