beatrizsmerino · January 29, 2026 12:18
diff --git a/claude_desktop_config.json b/claude_desktop_config.json
 {
  "mcpServers": {
    "weather": {
      "command": "npx",
      "args": [
        "-y",
        "tsx",
        "/ruta/a/tu/proyecto/01-start/main.ts"
      ]
    }
  }
 }
diff --git a/main.ts b/main.ts
 import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
 import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
 import { z } from 'zod'

 // 1. Crear el servidor
 // Es la interfaz principal con el protocolo MCP. Maneja la comunicacion entre el cliente y el servidor.

 const server = new McpServer({
  name: 'Demo',
  version: '1.0.0'
 })

 // 2. Definir las herramientas
 // Las herramientas le permite al LLM realizar acciones a través de tu servidor.
 server.tool(
  'fetch-weather',
  'Tool to fetch the weather of a city',
  {
    city: z.string().describe('City name'),
  },
  async ({ city }) => {
    // Geocoding: obtener latitud y longitud de la ciudad
    const response = await fetch(`https://geocoding-api.open-meteo.com/v1/search?name=${city}&count=1&language=en&format=json`)
    const data = await response.json()

    if (data.length === 0) {
      return {
        content: [
          {
            type: 'text',
            text: `No se encontró información para la ciudad ${city}`
          }
        ]
      }
    }

    const { latitude, longitude } = data.results[0]

    // Forecast: obtener el clima actual
    const weatherResponse = await fetch(`https://api.open-meteo.com/v1/forecast?latitude=${latitude}&longitude=${longitude}&hourly=temperature_2m&current=temperature_2m,precipitation,is_day,rain&forecast_days=1`)

    const weatherData = await weatherResponse.json()

    return {
      content: [
        {
          type: 'text',
          text: JSON.stringify(weatherData, null, 2)
        }
      ]
    }
  }
 )

 // 3. Escuchar las conexiones del cliente
 const transport = new StdioServerTransport()
 await server.connect(transport)
diff --git a/mcp-server-ts-weather-tutorial.md b/mcp-server-ts-weather-tutorial.md
diff --git a/package.json b/package.json
 {
  "name": "01-start",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "type": "module",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "packageManager": "pnpm@10.8.0",
  "dependencies": {
    "@modelcontextprotocol/sdk": "^1.9.0",
    "zod": "^3.24.2"
  }
 }
diff --git a/vscode-settings.json b/vscode-settings.json
 {
  "chat.agent.enabled": true,
  "mcp": {
    "servers": {
      "weather": {
        "command": "npx",
        "args": [
          "-y",
          "tsx",
          "/ruta/a/tu/proyecto/01-start/main.ts"
        ]
      }
    }
  }
 }
	{
	"mcpServers": {
	"weather": {
	"command": "npx",
	"args": [
	"-y",
	"tsx",
	"/ruta/a/tu/proyecto/01-start/main.ts"
	]
	}
	}
	}
	import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
	import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
	import { z } from 'zod'

	// 1. Crear el servidor
	// Es la interfaz principal con el protocolo MCP. Maneja la comunicacion entre el cliente y el servidor.

	const server = new McpServer({
	name: 'Demo',
	version: '1.0.0'
	})

	// 2. Definir las herramientas
	// Las herramientas le permite al LLM realizar acciones a través de tu servidor.
	server.tool(
	'fetch-weather',
	'Tool to fetch the weather of a city',
	{
	city: z.string().describe('City name'),
	},
	async ({ city }) => {
	// Geocoding: obtener latitud y longitud de la ciudad
	const response = await fetch(`https://geocoding-api.open-meteo.com/v1/search?name=${city}&count=1&language=en&format=json`)
	const data = await response.json()

	if (data.length === 0) {
	return {
	content: [
	{
	type: 'text',
	text: `No se encontró información para la ciudad ${city}`
	}
	]
	}
	}

	const { latitude, longitude } = data.results[0]

	// Forecast: obtener el clima actual
	const weatherResponse = await fetch(`https://api.open-meteo.com/v1/forecast?latitude=${latitude}&longitude=${longitude}&hourly=temperature_2m&current=temperature_2m,precipitation,is_day,rain&forecast_days=1`)

	const weatherData = await weatherResponse.json()

	return {
	content: [
	{
	type: 'text',
	text: JSON.stringify(weatherData, null, 2)
	}
	]
	}
	}
	)

	// 3. Escuchar las conexiones del cliente
	const transport = new StdioServerTransport()
	await server.connect(transport)
	{
	"name": "01-start",
	"version": "1.0.0",
	"description": "",
	"main": "index.js",
	"type": "module",
	"scripts": {
	"test": "echo \"Error: no test specified\" && exit 1"
	},
	"keywords": [],
	"author": "",
	"license": "ISC",
	"packageManager": "pnpm@10.8.0",
	"dependencies": {
	"@modelcontextprotocol/sdk": "^1.9.0",
	"zod": "^3.24.2"
	}
	}
	{
	"chat.agent.enabled": true,
	"mcp": {
	"servers": {
	"weather": {
	"command": "npx",
	"args": [
	"-y",
	"tsx",
	"/ruta/a/tu/proyecto/01-start/main.ts"
	]
	}
	}
	}
	}