import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { z } from "zod";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
const server = new McpServer({
name: "weather-mcp",
version: "1.0.0"
});
server.tool("get-weather", "Get the current weather for a city", {
city: z.string().describe("The name of the city to get the weather for"),
}, async ({ city }: { city: string }) => {
try {
const geoUrl = `https://nominatim.openstreetmap.org/search?q=${encodeURIComponent(city)}&format=json&limit=1`;
const geoResponse = await fetch(geoUrl, { headers: { "User-Agent": "weather-mcp/1.0 (your@email.com)" } });
const geoData = await geoResponse.json();
const { lat, lon, display_name } = geoData[0] || {};
if (!lat || !lon) throw new Error();
const weatherUrl = `https://api.open-meteo.com/v1/forecast?latitude=${lat}&longitude=${lon}¤t_weather=true`;
const weatherResponse = await fetch(weatherUrl);
const weatherData = await weatherResponse.json();
const current = weatherData.current_weather;
if (!current) throw new Error();
return {
content: [{
type: "text",
text: `🌤️ **Weather in ${display_name}:**\n\n**Temperature**: ${current.temperature}°C\n**Wind Speed**: ${current.windspeed} km/h\n**Weather Code**: ${current.weathercode}`,
}]
};
} catch {
return {
content: [{
type: "text",
text: `Error: Could not get weather for "${city}".`,
}]
};
}
});
const transport = new StdioServerTransport();
server.connect(transport);
