1
import asyncio
2
from mcp.server import Server
3
from mcp.server.stdio import stdio_server
4

5
# 创建 Server 实例
6
server = Server("my-first-mcp-server")
7

8
@server.tool()
9
async def get_current_time() -> str:
10
    """获取当前系统时间"""
11
    from datetime import datetime
12
    return datetime.now().strftime("%Y-%m-%d %H:%M:%S")
13

14
async def main():
15
    async with stdio_server() as (read_stream, write_stream):
16
        await server.run(
17
            read_stream,
18
            write_stream,
19
            server.create_initialization_options()
20
        )
21

22
if __name__ == "__main__":
23
    asyncio.run(main())

1
// macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
2
{
3
  "mcpServers": {
4
    "my-first-server": {
5
      "command": "python3",
6
      "args": ["/path/to/my-mcp-server/server.py"]
7
    }
8
  }
9
}

1
import asyncio
2
import httpx
3
from typing import Optional
4
from mcp.server import Server
5
from mcp.server.stdio import stdio_server
6
from mcp.types import Tool, TextContent
7

8
server = Server("weather-mcp-server")
9

10
# 模拟天气数据（实际项目中替换为真实 API 调用）
11
WEATHER_DATA = {
12
    "北京": {"temp": 32, "humidity": 65, "condition": "晴"},
13
    "上海": {"temp": 35, "humidity": 70, "condition": "多云"},
14
    "深圳": {"temp": 30, "humidity": 80, "condition": "雷阵雨"},
15
    "东京": {"temp": 28, "humidity": 60, "condition": "阴"},
16
}
17

18
@server.tool()
19
async def get_weather(city: str, unit: Optional[str] = "celsius") -> str:
20
    """查询指定城市的天气信息。
21

22
    Args:
23
        city: 城市名称，如 "北京"、"上海"、"深圳"
24
        unit: 温度单位，celsius（摄氏度）或 fahrenheit（华氏度）
25
    """
26
    data = WEATHER_DATA.get(city)
27
    if not data:
28
        return f"未找到城市「{city}」的天气数据。支持的城市：{', '.join(WEATHER_DATA.keys())}"
29

30
    temp = data["temp"]
31
    if unit == "fahrenheit":
32
        temp = temp * 9 / 5 + 32
33
        unit_str = "°F"
34
    else:
35
        unit_str = "°C"
36

37
    return (
38
        f"🌍 {city} 天气报告\n"
39
        f"━━━━━━━━━━━━━━\n"
40
        f"🌡️  温度：{temp:.1f}{unit_str}\n"
41
        f"💧 湿度：{data['humidity']}%\n"
42
        f"☁️  天气：{data['condition']}\n"
43
    )
44

45

46
@server.tool()
47
async def compare_weather(city_a: str, city_b: str) -> str:
48
    """比较两个城市的天气情况。
49

50
    Args:
51
        city_a: 第一个城市名称
52
        city_b: 第二个城市名称
53
    """
54
    data_a = WEATHER_DATA.get(city_a)
55
    data_b = WEATHER_DATA.get(city_b)
56

57
    if not data_a or not data_b:
58
        missing = city_a if not data_a else city_b
59
        return f"未找到城市「{missing}」的天气数据"
60

61
    comparison = f"📊 天气对比：{city_a} vs {city_b}\n"
62
    comparison += f"━━━━━━━━━━━━━━━━━━━━\n"
63
    comparison += f"🌡️   {city_a}：{data_a['temp']}°C  |  {city_b}：{data_b['temp']}°C\n"
64
    comparison += f"💧 {city_a}：{data_a['humidity']}%  |  {city_b}：{data_b['humidity']}%\n"
65
    comparison += f"☁️  {city_a}：{data_a['condition']}  |  {city_b}：{data_b['condition']}\n"
66

67
    cooler = city_a if data_a['temp'] < data_b['temp'] else city_b
68
    comparison += f"\n💡 {cooler} 更凉快，适合出门！"
69

70
    return comparison
71

72

73
async def main():
74
    async with stdio_server() as (read_stream, write_stream):
75
        await server.run(
76
            read_stream,
77
            write_stream,
78
            server.create_initialization_options()
79
        )
80

81
if __name__ == "__main__":
82
    asyncio.run(main())