Commit inicial

.gitignore

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+node_modules
+package-lock.json

main.ts

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+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 comunicación entre el cliente y el servidor.
+
+const server = new McpServer({
+    name: 'Demo',
+    version: '1.0.0'
+});
+// 2. Definir las herramientas
+// Las herramientas le permiten al LLM realizar acciones a través de tu servidor.
+
+server.tool(
+    'fetch_weather',
+    'Tool to fetch the weather of a city', // Descripción de la herramienta
+    {
+        city: z.string().describe('City name')
+    },
+    async ({ city }) => {
+        const response = await fetch(`https://geocoding-api.open-meteo.com/v1/search?name=${city}&count=10&language=en&format=json`)
+        const data = await response.json()
+        if (! data.hasOwnProperty("results")) {
+            return {
+                content: [
+                    {
+                        type: 'text',
+                        text: `No se encontró información del tiempo para ${city}`
+                    }
+                ]
+            }
+        }
+        const { latitude, longitude } = data.results[0]
+        const weatherResponse = await fetch(`https://api.open-meteo.com/v1/forecast?latitude=${latitude}&longitude=${longitude}&hourly=temperature_2m&current=temperature_2m,precipitation,is_day,rain,wind_speed_10m&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(); // Para ejecutarlo en local para probar.
+await server.connect(transport);

package.json

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+{
+  "name": "mcp-01",
+  "version": "1.0.0",
+  "main": "index.js",
+  "type": "module",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "Ricardo Montañana",
+  "license": "MIT",
+  "description": "",
+  "dependencies": {
+    "@modelcontextprotocol/sdk": "^1.10.1",
+    "zod": "^3.24.3"
+  },
+  "devDependencies": {
+    "typescript": "^5.8.3"
+  }
+}