Google Search MCP Server
Servidor MCP de Búsqueda de Google
Un servidor de Protocolo de Contexto de Modelo (MCP) que ofrece funciones de búsqueda web e imágenes a través de la API de Búsqueda Personalizada de Google. Este servidor cumple con la especificación MCP para integrarse con Claude y otros asistentes de IA.
Lo que estamos construyendo
Muchos asistentes de IA no tienen información actualizada ni la capacidad de buscar en la web. Este servidor MCP soluciona este problema proporcionando dos herramientas:
google_web_search: busca en la web información actualizadagoogle_image_search: Encuentra imágenes relacionadas con las consultas
Una vez conectado a un cliente compatible con MCP (como Claude in Cursor, VSCode o Claude Desktop), su asistente de IA puede realizar búsquedas y acceder a información actual.
Related MCP server: Google Search MCP Server
Conceptos básicos de MCP
Los servidores MCP proporcionan capacidades a los asistentes de IA. Este servidor implementa:
Herramientas : Funciones que la IA puede llamar (con la aprobación del usuario)
Comunicación estructurada : formato de mensajería estandarizado a través del protocolo MCP
Capa de transporte : comunicación a través de entrada/salida estándar
Prerrequisitos
Node.js (v18 o superior) y npm
Cuenta de Google Cloud Platform
Clave de API de búsqueda personalizada de Google e ID de motor de búsqueda
Un cliente compatible con MCP (Claude for Desktop, Cursor, VSCode con Claude, etc.)
Inicio rápido (Clonar este repositorio)
Si desea utilizar este servidor sin construirlo desde cero, siga estos pasos:
# Clone the repository
git clone https://github.com/yourusername/google-search-mcp-server.git
cd google-search-mcp-server
# Install dependencies
npm install
# Set up your environment variables
# Setup .env file in the root folder of the project
# On macOS/Linux
touch .env
# On Windows
new-item .env
# Edit .env file to add your Google API credentials
# Use any text editor you prefer (VS Code, Notepad, nano, vim, etc.)
# Add these to your newly created .env
GOOGLE_API_KEY=your_api_key_here
GOOGLE_CSE_ID=your_search_engine_id_here
# Build the server
npm run build
# Test the server (optional)
# On macOS/Linux
echo '{"jsonrpc":"2.0","method":"listTools","id":1}' | node dist/index.js
# On Windows PowerShell
echo '{"jsonrpc":"2.0","method":"listTools","id":1}' | node dist/index.js
# On Windows CMD
echo {"jsonrpc":"2.0","method":"listTools","id":1} | node dist/index.jsDespués de la construcción, siga la sección Conexión a clientes MCP para conectar el servidor a su cliente preferido.
Configura tu entorno (construye desde cero)
Si prefieres construir el servidor tú mismo desde cero, sigue estas instrucciones:
Crear la estructura del proyecto
macOS/Linux
# Create a new directory for our project
mkdir google-search-mcp
cd google-search-mcp
# Initialize a new npm project
npm init -y
# Install dependencies
npm install @modelcontextprotocol/sdk dotenv zod
npm install -D @types/node typescript
# Create our files
mkdir src
touch src/index.tsVentanas
# Create a new directory for our project
md google-search-mcp
cd google-search-mcp
# Initialize a new npm project
npm init -y
# Install dependencies
npm install @modelcontextprotocol/sdk dotenv zod
npm install -D @types/node typescript
# Create our files
md src
new-item src\index.tsConfigurar TypeScript
Cree un tsconfig.json en el directorio raíz:
{
"compilerOptions": {
"target": "ES2022",
"module": "Node16",
"moduleResolution": "Node16",
"outDir": "./dist",
"rootDir": "./src",
"strict": true,
"esModuleInterop": true,
"skipLibCheck": true,
"forceConsistentCasingInFileNames": true
},
"include": ["src/**/*"],
"exclude": ["node_modules"]
}Actualizar package.json
Asegúrese de que su package.json incluya:
{
"name": "google_search_mcp",
"version": "0.1.0",
"description": "MCP server for Google Custom Search API integration",
"license": "MIT",
"type": "module",
"bin": {
"google_search": "./dist/index.js"
},
"files": [
"dist"
],
"scripts": {
"build": "tsc",
"build:unix": "tsc && chmod 755 dist/index.js",
"prepare": "npm run build",
"watch": "tsc --watch",
"start": "node dist/index.js"
}
}Configuración de la API de Google
Necesitará configurar Google Cloud Platform y obtener las credenciales de API:
Configuración de Google Cloud Platform
Crear un nuevo proyecto
Habilitar la API de búsqueda personalizada:
Navigate to "APIs & Services" → "Library" Search for "Custom Search API" Click on "Custom Search API" → "Enable"Crear credenciales de API:
Navigate to "APIs & Services" → "Credentials" Click "Create Credentials" → "API key" Copy your API key
Configuración de motor de búsqueda personalizado
Haga clic en "Agregar" para crear un nuevo motor de búsqueda.
Seleccione "Buscar en toda la web" y nombre su motor de búsqueda.
Obtenga su ID de motor de búsqueda (valor cx) desde el Panel de control
Configuración del entorno
Cree un archivo .env en el directorio raíz:
GOOGLE_API_KEY=your_api_key_here
GOOGLE_CSE_ID=your_search_engine_id_hereAgregue .env a su archivo .gitignore para proteger sus credenciales:
echo ".env" >> .gitignoreConstruyendo su servidor
Crear la implementación del servidor
Cree la implementación de su servidor en src/index.ts :
import dotenv from "dotenv"
import { Server } from "@modelcontextprotocol/sdk/server/index.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import {
CallToolRequestSchema,
ListToolsRequestSchema,
Tool,
} from "@modelcontextprotocol/sdk/types.js";
dotenv.config();
// Define your tools
const WEB_SEARCH_TOOL: Tool = {
name: "google_web_search",
description: "Performs a web search using Google's Custom Search API...",
inputSchema: {
// Schema details here
},
};
const IMAGE_SEARCH_TOOL: Tool = {
name: "google_image_search",
description: "Searches for images using Google's Custom Search API...",
inputSchema: {
// Schema details here
}
};
// Server implementation
const server = new Server(
{
name: "google-search",
version: "0.1.0",
},
{
capabilities: {
tools: {},
},
},
);
// Check for API key and Search Engine ID
const GOOGLE_API_KEY = process.env.GOOGLE_API_KEY!;
const GOOGLE_CSE_ID = process.env.GOOGLE_CSE_ID!;
if (!GOOGLE_API_KEY || !GOOGLE_CSE_ID) {
console.error("Error: Missing environment variables");
process.exit(1);
}
// Tool handlers
server.setRequestHandler(ListToolsRequestSchema, async () => ({
tools: [WEB_SEARCH_TOOL, IMAGE_SEARCH_TOOL],
}));
server.setRequestHandler(CallToolRequestSchema, async (request) => {
// Implement tool handlers
});
// Run the server
async function runServer() {
const transport = new StdioServerTransport();
await server.connect(transport);
console.error("Google Search MCP Server running on stdio");
}
runServer().catch((error) => {
console.error("Fatal error running server:", error);
process.exit(1);
});Para obtener los detalles completos de implementación, consulte los archivos del repositorio.
Construyendo el servidor
Después de completar su implementación, construya el servidor:
npm run buildEsto compilará el código TypeScript a JavaScript en el directorio dist .
Conexión a clientes MCP
Los servidores MCP se pueden conectar a varios clientes. Aquí tienes las instrucciones de configuración para los más populares:
Claude para escritorio
macOS/Linux
Abra su archivo de configuración:
code ~/Library/Application\ Support/Claude/claude_desktop_config.jsonAgregue la configuración del servidor:
{
"mcpServers": {
"google_search": {
"command": "node",
"args": [
"/absolute/path/to/google-search-mcp/dist/index.js"
],
"env": {
"GOOGLE_API_KEY": "your_api_key_here",
"GOOGLE_CSE_ID": "your_search_engine_id_here"
}
}
}
}Ventanas
Abra su archivo de configuración:
code $env:AppData\Claude\claude_desktop_config.jsonAgregue la configuración del servidor:
{
"mcpServers": {
"google_search": {
"command": "node",
"args": [
"C:\\absolute\\path\\to\\google-search-mcp\\dist\\index.js"
],
"env": {
"GOOGLE_API_KEY": "your_api_key_here",
"GOOGLE_CSE_ID": "your_search_engine_id_here"
}
}
}
}Reiniciar Claude para escritorio
Verifique que las herramientas aparezcan haciendo clic en el ícono de la herramienta en la interfaz
VSCode con Claude
macOS/Linux y Windows
Instalar la extensión MCP para VSCode
Cree o edite
.vscode/settings.jsonen su espacio de trabajo:
Para macOS/Linux:
{
"mcp.servers": {
"google_search": {
"command": "node",
"args": [
"/absolute/path/to/google-search-mcp/dist/index.js"
],
"env": {
"GOOGLE_API_KEY": "your_api_key_here",
"GOOGLE_CSE_ID": "your_search_engine_id_here"
}
}
}
}Para Windows:
{
"mcp.servers": {
"google_search": {
"command": "node",
"args": [
"C:\\absolute\\path\\to\\google-search-mcp\\dist\\index.js"
],
"env": {
"GOOGLE_API_KEY": "your_api_key_here",
"GOOGLE_CSE_ID": "your_search_engine_id_here"
}
}
}
}Reiniciar VSCode
Las herramientas estarán disponibles para Claude en VSCode
Cursor
Abrir la configuración del cursor (icono de engranaje)
Busque "MCP" y abra la configuración de MCP
Haga clic en "Agregar nuevo servidor MCP"
Configurar con configuraciones similares a las anteriores:
Para macOS/Linux:
{
"mcpServers": {
"google_search": {
"command": "node",
"args": [
"/absolute/path/to/google-search-mcp/dist/index.js"
],
"env": {
"GOOGLE_API_KEY": "your_api_key_here",
"GOOGLE_CSE_ID": "your_search_engine_id_here"
}
}
}
}Para Windows:
{
"mcpServers": {
"google_search": {
"command": "node",
"args": [
"C:\\absolute\\path\\to\\google-search-mcp\\dist\\index.js"
],
"env": {
"GOOGLE_API_KEY": "your_api_key_here",
"GOOGLE_CSE_ID": "your_search_engine_id_here"
}
}
}
}Reiniciar cursor
Probando su servidor
Usando con Claude
Una vez conectado, puedes probar las herramientas haciéndole a Claude preguntas como:
Busca las últimas noticias sobre energías renovables.
"Encuentra imágenes de vehículos eléctricos"
"¿Cuáles son los principales destinos turísticos en Japón?"
Claude utilizará automáticamente la herramienta de búsqueda adecuada cuando sea necesario.
Pruebas manuales
También puedes probar tu servidor directamente:
# Test web search
echo '{
"jsonrpc": "2.0",
"method": "callTool",
"params": {
"name": "google_web_search",
"arguments": {
"query": "test query",
"count": 2
}
},
"id": 1
}' | node dist/index.js¿Qué está pasando bajo el capó?
Cuando haces una pregunta:
El cliente envía su pregunta a Claude
Claude analiza las herramientas disponibles y decide cuál utilizar
El cliente ejecuta la herramienta elegida a través de su servidor MCP
Los resultados se envían a Claude.
Claude formula una respuesta en lenguaje natural basada en los resultados de la búsqueda.
La respuesta se te muestra
Solución de problemas
Problemas comunes
Variables de entorno
Si ve Error: GOOGLE_API_KEY environment variable is required :
# Check your .env file
cat .env
# Try setting environment variables directly:
export GOOGLE_API_KEY=your_key_here
export GOOGLE_CSE_ID=your_id_hereErrores de API
Si encuentra errores de API:
# Test your API credentials directly
curl "https://www.googleapis.com/customsearch/v1?key=YOUR_API_KEY&cx=YOUR_CX_ID&q=test"Problemas de conexión
Si su cliente no puede conectarse al servidor:
# Verify the server runs correctly on its own
node dist/index.js
# Check file permissions
chmod 755 dist/index.js
# Ensure you're using absolute paths in your configurationReferencia de API
google_web_search
Realiza una búsqueda web utilizando la API de búsqueda personalizada de Google.
Parámetros:
query(cadena, obligatoria): La consulta de búsquedacount(número, opcional): Número de resultados (1-10, predeterminado 5)start(número, opcional): Índice de inicio de paginación (predeterminado 1)site(cadena, opcional): limita la búsqueda a un sitio específico (por ejemplo, 'ejemplo.com')
google_image_search
Busca imágenes utilizando la API de búsqueda personalizada de Google.
Parámetros:
query(cadena, obligatoria): La consulta de búsqueda de imágenescount(número, opcional): Número de resultados (1-10, predeterminado 5)start(número, opcional): Índice de inicio de paginación (predeterminado 1)
Limitaciones
Nivel gratuito de la API de búsqueda personalizada de Google: 100 consultas por día
Límite de velocidad impuesto por el servidor: 5 solicitudes por segundo
Máximo 10 resultados por consulta (limitación de la API de Google)
Licencia
Este proyecto está licenciado bajo la licencia MIT: consulte el archivo de LICENCIA para obtener más detalles.
Available Tools
2 toolsgoogle_image_searchB
Searches for images using Google's Custom Search API. Best for finding images related to specific terms, concepts, or objects. Returns image URLs, titles, and thumbnails. Use this when needing to find relevant images or visual references.
| Name | Required | Description | Default |
|---|---|---|---|
| count | No | Number of results (1-10, default 5) | |
| query | Yes | Image search query | |
| start | No | Pagination start index (default 1) |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions the API source and return values (image URLs, titles, thumbnails) but lacks details on rate limits, authentication needs, error handling, or whether this is a read-only operation. For a search tool with external API dependencies, this leaves significant behavioral gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is appropriately sized and front-loaded: it starts with the core purpose, adds context about best use cases, specifies return values, and ends with usage guidance. Every sentence adds value without redundancy, making it efficient and well-structured.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's moderate complexity (external API search with 3 parameters) and no annotations or output schema, the description is partially complete. It covers purpose, usage, and returns but lacks behavioral details like rate limits or error handling. It's adequate for basic use but insufficient for robust agent operation without additional context.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The schema description coverage is 100%, so the schema already documents all three parameters (count, query, start) with their types, defaults, and constraints. The description adds no additional parameter semantics beyond what's in the schema, meeting the baseline for high schema coverage.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's purpose: 'Searches for images using Google's Custom Search API' with specific resources (image URLs, titles, thumbnails) and distinguishes it from the sibling google_web_search by focusing on images rather than general web content. However, it doesn't explicitly name the sibling for comparison.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides implied usage guidance: 'Best for finding images related to specific terms, concepts, or objects' and 'Use this when needing to find relevant images or visual references.' It suggests when to use it but doesn't explicitly mention when not to use it or directly compare it to the sibling google_web_search.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
google_web_searchA
Performs a web search using the Google Custom Search API, ideal for general queries, news, articles, and online content. Use this for broad information gathering, recent events, or when you need diverse web sources. Supports pagination and filtering by site or type. Maximum 10 results per request, with start index for pagination.
| Name | Required | Description | Default |
|---|---|---|---|
| count | No | Number of results (1-10, default 5) | |
| query | Yes | Search query | |
| site | No | Optional: Limit search to specific site (e.g., 'site:example.com') | |
| start | No | Pagination start index (default 1) |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions key behavioral traits: 'maximum 10 results per request', 'supports pagination and filtering by site or type', and 'start index for pagination'. However, it doesn't cover important aspects like rate limits, authentication requirements, error conditions, or what the response format looks like.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is efficiently structured in three sentences that each serve distinct purposes: stating the core functionality, providing usage guidance, and disclosing behavioral constraints. Every sentence earns its place with no redundant information, making it appropriately sized and front-loaded.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a search tool with 4 parameters, 100% schema coverage, but no annotations and no output schema, the description provides adequate context about what the tool does and when to use it. However, it lacks information about the response format, error handling, and operational constraints like rate limits, which would be important for an API-based search tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
With 100% schema description coverage, the input schema already documents all 4 parameters thoroughly. The description adds minimal value beyond what's in the schema - it mentions 'filtering by site or type' and 'pagination' which map to the 'site' and 'start' parameters, but doesn't provide additional semantic context beyond what the schema descriptions already offer.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool 'performs a web search using the Google Custom Search API' with specific examples of use cases (general queries, news, articles, online content). It distinguishes from the sibling tool 'google_image_search' by specifying this is for web content rather than images. However, it doesn't explicitly contrast with the sibling beyond the domain difference.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides clear context for when to use this tool ('broad information gathering, recent events, or when you need diverse web sources'), which implicitly distinguishes it from the image search sibling. It doesn't explicitly state when NOT to use it or name alternatives beyond the implied contrast with image search.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
2 tool updates
v1.0.0- First observed
google_image_search - First observed
google_web_search
TDQS
Scored across 2 tools
The two tools have clearly distinct purposes: google_image_search is for finding images, while google_web_search is for general web content like articles and news. There is no overlap in functionality, making it easy for an agent to choose the correct tool based on the need for visual vs. textual information.
Both tools follow a consistent verb_noun pattern with 'google_' prefix and descriptive suffixes (_image_search, _web_search). The naming is uniform and predictable, adhering to snake_case throughout without any deviations or mixed conventions.
With only 2 tools, the server is minimal but reasonable for a search-focused domain, covering image and web searches. It might feel slightly thin if broader search capabilities (e.g., video, news-specific) were expected, but it's well-scoped for basic search needs without being overloaded.
For a Google Search server, the tools cover the core search operations: image and web searches. Minor gaps exist, such as lack of specialized search types (e.g., video, scholarly articles) or advanced filtering options, but agents can work around this with the provided tools for most common queries.
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