How to integrate Googlecontacts MCP with Claude Agent SDK

This guide walks you through connecting Googlecontacts to the Claude Agent SDK using the Composio tool router. By the end, you'll have a working Googlecontacts agent that can find contacts at acme corporation, create contact for new sales lead, update phone number for priya shah through natural language commands. This guide will help you understand how to give your Claude Agent SDK agent real control over a Googlecontacts account through Composio's Googlecontacts MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

Get started for freeGet a demo
Googlecontacts logoGooglecontacts
Oauth2

Googlecontacts is Google’s contact management service powered by the Google People API. It keeps names, emails, phone numbers, and contact details synced across Google Workspace.

24 Tools

Introduction

This guide walks you through connecting Googlecontacts to the Claude Agent SDK using the Composio tool router. By the end, you'll have a working Googlecontacts agent that can find contacts at acme corporation, create contact for new sales lead, update phone number for priya shah through natural language commands.

This guide will help you understand how to give your Claude Agent SDK agent real control over a Googlecontacts account through Composio's Googlecontacts MCP server.

Before we dive in, let's take a quick look at the key ideas and tools involved.

Also integrate Googlecontacts with

OpenAI Agents SDKClaude CodeClaude CoworkCodexOpenClawHermesCLIGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAI

TL;DR

Here's what you'll learn:
  • Get and set up your Claude/Anthropic and Composio API keys
  • Install the necessary dependencies
  • Initialize Composio and create a Tool Router session for Googlecontacts
  • Configure an AI agent that can use Googlecontacts as a tool
  • Run a live chat session where you can ask the agent to perform Googlecontacts operations

What is Claude Agent SDK?

The Claude Agent SDK is Anthropic's official framework for building AI agents powered by Claude. It provides a streamlined interface for creating agents with MCP tool support and conversation management.

Key features include:

  • Native MCP Support: Built-in support for Model Context Protocol servers
  • Permission Modes: Control tool execution permissions
  • Streaming Responses: Real-time response streaming for interactive applications
  • Context Manager: Clean async context management for sessions

What is the Googlecontacts MCP server, and what's possible with it?

The Googlecontacts MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Googlecontacts account. It provides structured and secure access to your contacts, contact groups, other contacts, and domain directory, so your agent can search, create, update, delete, and organize contacts on your behalf.

  • Contact search and lookup: Instruct your agent to search your contacts, retrieve individual people, or list all saved connections.
  • Contact creation and updates: Have your agent create new contacts, update existing details, or add many contacts at once.
  • Contact groups and membership: Let the agent create, rename, list, or delete contact groups and manage which contacts belong to them.
  • Directory and other contact discovery: Direct your agent to search your organization’s directory, review other contacts, and copy useful people into your main contacts.
  • Contact cleanup and photos: Have your agent delete individual contacts or batches of contacts, then add, replace, or remove contact photos.

What is the Composio tool router, and how does it fit here?

What is Composio SDK?

Composio's Composio SDK helps agents find the right tools for a task at runtime. You can plug in multiple toolkits (like Gmail, HubSpot, and GitHub), and the agent will identify the relevant app and action to complete multi-step workflows. This can reduce token usage and improve the reliability of tool calls. Read more here: Getting started with Composio SDK

The tool router generates a secure MCP URL that your agents can access to perform actions.

How the Composio SDK works

The Composio SDK follows a three-phase workflow:

  1. Discovery: Searches for tools matching your task and returns relevant toolkits with their details.
  2. Authentication: Checks for active connections. If missing, creates an auth config and returns a connection URL via Auth Link.
  3. Execution: Executes the action using the authenticated connection.

Step-by-step Guide

Step by step09 STEPS
1

Prerequisites

Before starting, make sure you have:
  • Composio API Key and Claude/Anthropic API Key
  • Primary know-how of Claude Agents SDK
  • A Googlecontacts account
  • Some knowledge of Python
2

Getting API Keys for Claude/Anthropic and Composio

Claude/Anthropic API Key
  • Go to the Anthropic Console and create an API key. You'll need credits to use the models.
  • Keep the API key safe.
Composio API Key
  • Log in to the Composio dashboard.
  • Navigate to your API settings and generate a new API key.
  • Store this key securely as you'll need it for authentication.
3

Install dependencies

npm install @anthropic-ai/claude-agent-sdk @composio/core dotenv

Install the Composio SDK and the Claude Agents SDK.

What's happening:

  • @composio/core provides Composio integration for Anthropic
  • @anthropic-ai/claude-agent-sdk is the core agent framework
  • dotenv/config loads environment variables
4

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here
ANTHROPIC_API_KEY=your_anthropic_api_key_here

Create a .env file in your project root.

What's happening:

  • COMPOSIO_API_KEY authenticates with Composio
  • USER_ID identifies the user for session management
  • ANTHROPIC_API_KEY authenticates with Anthropic/Claude
5

Import dependencies

import 'dotenv/config';
import readline from 'node:readline';
import { Composio } from '@composio/core';
import { query, type Options } from "@anthropic-ai/claude-agent-sdk";

dotenv.config();
What's happening:
  • We're importing all necessary libraries including the Claude Agent SDK and Composio
  • The dotenv.config() function loads environment variables from your .env file
  • This setup prepares the foundation for connecting Claude with Googlecontacts functionality
6

Create a Composio instance and Tool Router session

async function chat() {
  const { COMPOSIO_API_KEY, USER_ID } = process.env;
  if (!COMPOSIO_API_KEY || !USER_ID) {
    throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
  }

  const composio = new Composio({ apiKey: COMPOSIO_API_KEY });

  // Create Tool Router session for Googlecontacts
  const session = await composio.create(USER_ID, {
    toolkits: ['googlecontacts'],
  });
  const mcpUrl = session?.mcp.url;
What's happening:
  • The function checks for the required COMPOSIO_API_KEY environment variable
  • We're creating a Composio instance using our API key
  • The create method creates a Tool Router session for Googlecontacts
  • The returned url is the MCP server URL that your agent will use
7

Configure Claude Agent with MCP

const options: Options = {
  permissionMode: 'bypassPermissions',
  mcpServers: {
    composio: {
      type: 'http',
      url: mcpUrl,
      headers: { 'x-api-key': COMPOSIO_API_KEY }
    }
  },
  systemPrompt: 'You are a helpful assistant with access to Googlecontacts tools via Composio.',
  maxTurns: 10,
};
What's happening:
  • We're configuring the Claude Agent options with the MCP server URL
  • permissionMode: 'bypassPermissions' allows the agent to execute operations without asking for permission each time
  • The system prompt instructs the agent that it has access to Googlecontacts
  • maxTurns: 10 limits the conversation length to prevent excessive API usage
8

Create client and start chat loop

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    prompt: 'You: '
  });

  console.log('\nChat started. Type "exit" to quit.\n');

  let isProcessing = false;

  async function ask(prompt: string) {
    isProcessing = true;
    rl.pause();

    process.stdout.write('Claude is thinking...');
    const stream = query({ prompt, options });

    let firstChunk = true;
    for await (const msg of stream) {
      const content = (msg as any).message?.content || (msg as any).content;
      if (Array.isArray(content)) {
        for (const block of content) {
          if (block.type === 'text' && block.text) {
            if (firstChunk) {
              process.stdout.write('\r\x1b[K');
              process.stdout.write('Claude: ');
              firstChunk = false;
            }
            process.stdout.write(block.text);
          }
        }
      }
    }
    process.stdout.write('\n\n');

    isProcessing = false;
    rl.resume();
    rl.prompt();
  }

  rl.on('line', async (line) => {
    if (isProcessing) return;

    const input = line.trim();
    if (input === 'exit') {
      rl.close();
      process.exit(0);
    }
    if (input) await ask(input);
    else rl.prompt();
  });

  await ask('What can you help me with?');
}
What's happening:
  • The readline interface is created to handle user input and output
  • The query function is used to send the user's input to the agent
  • The chat loop continues until the user types 'exit' or 'quit'
9

Run the application

try {
  await chat();
} catch (error) {
  console.error(error);
  process.exit(1);
}
What's happening:
  • The chat function is the entry point for the application
  • The try-catch block is used to handle any errors that occur

Complete Code

Here's the complete code to get you started with Googlecontacts and Claude Agent SDK:

import 'dotenv/config';
import readline from 'node:readline';
import { Composio } from '@composio/core';
import { query, type Options } from "@anthropic-ai/claude-agent-sdk";

async function chat() {
  const { COMPOSIO_API_KEY, USER_ID } = process.env;
  if (!COMPOSIO_API_KEY || !USER_ID) {
    throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
  }

  const composio = new Composio({ apiKey: COMPOSIO_API_KEY });
  const session = await composio.create(USER_ID, {
    toolkits: ['googlecontacts']
  });
  const mcp_url = session?.mcp.url;

  const options: Options = {
    permissionMode: 'bypassPermissions',
    mcpServers: {
      composio: {
        type: 'http',
        url: mcp_url,
        headers: { 'x-api-key': COMPOSIO_API_KEY }
      }
    },
    systemPrompt: 'You are a helpful assistant with access to Googlecontacts tools via Composio.',
    maxTurns: 10,
  };

  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    prompt: 'You: '
  });

  console.log('\nChat started. Type "exit" to quit.\n');

  let isProcessing = false;

  async function ask(prompt: string) {
    isProcessing = true;
    rl.pause();

    process.stdout.write('Claude is thinking...');
    const stream = query({ prompt, options });

    let firstChunk = true;
    for await (const msg of stream) {
      const content = (msg as any).message?.content || (msg as any).content;
      if (Array.isArray(content)) {
        for (const block of content) {
          if (block.type === 'text' && block.text) {
            if (firstChunk) {
              process.stdout.write('\r\x1b[K');
              process.stdout.write('Claude: ');
              firstChunk = false;
            }
            process.stdout.write(block.text);
          }
        }
      }
    }
    process.stdout.write('\n\n');

    isProcessing = false;
    rl.resume();
    rl.prompt();
  }

  rl.on('line', async (line) => {
    if (isProcessing) return;

    const input = line.trim();
    if (input === 'exit') {
      rl.close();
      process.exit(0);
    }
    if (input) await ask(input);
    else rl.prompt();
  });

  await ask('What can you help me with?');
}

try {
  await chat();
} catch (error) {
  console.error(error);
  process.exit(1);
}

Conclusion

You've successfully built a Claude Agent SDK agent that can interact with Googlecontacts through Composio's Tool Router.

Key features:

  • Native MCP support through Claude's agent framework
  • Streaming responses for real-time interaction
  • Permission bypass for smooth automated workflows
You can extend this by adding more toolkits, implementing custom business logic, or building a web interface around the agent.
TOOLS

Supported Tools

Every Googlecontacts action and event your agent gets out of the box.

Batch create contacts

Create a batch of new contacts in Google Contacts.

Batch get contact groups

Get a list of contact groups owned by the authenticated user by specifying a list of contact group resource names.

Batch Update Google Contacts

Update a batch of contacts in Google Contacts and return the updated contact data.

Copy Other Contact to My Contacts

Copies an Other contact to a new contact in the user's myContacts group.

Create Contact

Create a new contact in Google Contacts and return the person resource for that contact.

Create Contact Group

Create a new contact group owned by the authenticated user.

Delete Google Contact

Delete a contact person from Google Contacts.

Delete contact group

Deletes an existing contact group owned by the authenticated user by specifying the contact group resource name.

Delete Contact Photo

Delete a contact's photo from Google Contacts.

Batch Delete Google Contacts

Delete a batch of contacts from Google Contacts.

Batch get people

Batch retrieves information about multiple people from Google Contacts.

Get Contact Group

Retrieves a specific contact group owned by the authenticated user by specifying the contact group resource name.

Get Person

Provides information about a person by specifying a resource name.

List Connections

Lists the connections (contacts) for the authenticated user.

List Contact Groups

List all contact groups owned by the authenticated user.

List Directory People

Lists domain profiles and domain contacts in the authenticated user's domain directory.

List Other Contacts

Lists "Other contacts" from Google People API.

Modify Contact Group Members

Modifies the members of a contact group by adding or removing contact resource names.

Search Contacts

Searches the authenticated user's contacts for matches against the provided query.

Search Domain Directory People

Search domain directory people in Google Contacts.

Search Other Contacts

Searches other contacts from Google People API that match a query string.

Update Google Contact

Update contact data for an existing contact person.

Update Contact Group

Update the name of an existing contact group owned by the authenticated user.

Update Contact Photo

Update a contact's photo.

FRAMEWORKS

How to build Googlecontacts MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Googlecontacts MCP with OpenAI Agents SDK

Claude Code logo

Claude Code

Use Googlecontacts MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Googlecontacts MCP with Claude Cowork

Codex logo

Codex

Use Googlecontacts MCP with Codex

OpenClaw logo

OpenClaw

Use Googlecontacts MCP with OpenClaw

Hermes logo

Hermes

Use Googlecontacts MCP with Hermes

CLI logo

CLI

Use Googlecontacts MCP with CLI

Google ADK logo

Google ADK

Use Googlecontacts MCP with Google ADK

LangChain logo

LangChain

Use Googlecontacts MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Googlecontacts MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Googlecontacts MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Googlecontacts MCP with LlamaIndex

CrewAI logo

CrewAI

Use Googlecontacts MCP with CrewAI

FAQ

Frequently asked questions

With a standalone Googlecontacts MCP server, the agents and LLMs can only access a fixed set of Googlecontacts tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Googlecontacts and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Agent SDK fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Googlecontacts tools.

Yes, absolutely. You can configure which Googlecontacts scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Googlecontacts data and credentials are handled as safely as possible.

Start with Googlecontacts.It takes 30 seconds.

Managed auth, hosted MCP servers, and every Googlecontacts tool your agent needs.Free to start.

Start building
Customer stories

Teams ship real agents on Composio

GET STARTED FOR FREEBOOK A DEMO
agent.aiZoomLettaGleanHubSpotAWSWabi

Karan skipped his own birthday party to fix our critical issue. It was 10pm and he diverted his Waymo to help us instead. This really sets the bar — it shows the commitment you need when users rely on your software.

Harsha Gaddipati
Harsha Gaddipati
Co-founder, Slashy

A lot of students tell us that the moment their connected tools start talking to each other inside Opennote feels almost magical. The agent just knows them, and it's immensely helped keep new users on the platform.

Abhi Arya
Abhi Arya
Co-founder, Opennote

We chose Composio over Pipedream because it delivered depth where it mattered — niche tools and tricky edge cases other platforms simply ignored. That gave us confidence to scale without compromising.

Nirman Dave
Nirman Dave
CEO, Zams

As a solo builder, shipping fast is life or death. The only way I can outcompete incumbents is by outmanoeuvring them. Getting bogged down managing agent auth would have been a death sentence.

Ryan Yu
Ryan Yu
Founder, Extra Thursday

Before Composio, adding tool integrations was slow and resource-intensive. Each one could take weeks of engineering time, and maintaining them meant constantly keeping up with API changes.

Tomisin Jenrola
Tomisin Jenrola
Founder & CEO, SwarmZero

With hands-on help from their founder, we integrated Gmail and Google Drive in just 30 minutes. This level of personal support and commitment is exactly what startups should strive for.

Jerome Leclanche
Jerome Leclanche
Co-Founder, Ingram Technologies