How to integrate Googlecontacts MCP with Google ADK

This guide walks you through connecting Googlecontacts to Google ADK 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 Google ADK 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.

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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 Google ADK 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 Google ADK 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 Agent SDKClaude CodeClaude CoworkCodexOpenClawHermesCLILangChainVercel AI SDKMastra AILlamaIndexCrewAI

TL;DR

Here's what you'll learn:
  • Get a Googlecontacts account set up and connected to Composio
  • Install the Google ADK and Composio packages
  • Create a Composio Tool Router session for Googlecontacts
  • Build an agent that connects to Googlecontacts through MCP
  • Interact with Googlecontacts using natural language

What is Google ADK?

Google ADK (Agents Development Kit) is Google's framework for building AI agents powered by Gemini models. It provides tools for creating agents that can use external services through the Model Context Protocol.

Key features include:

  • Gemini Integration: Native support for Google's Gemini models
  • MCP Toolset: Built-in support for Model Context Protocol tools
  • Streamable HTTP: Connect to external services through streamable HTTP
  • CLI and Web UI: Run agents via command line or web interface

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:
  • A Google API key for Gemini models
  • A Composio account and API key
  • Python 3.9 or later installed
  • Basic familiarity with Python
2

Getting API Keys for Google and Composio

Google API Key
  • Go to Google AI Studio and create an API key.
  • Copy the key and keep it safe. You will put this in GOOGLE_API_KEY.
Composio API Key and User ID
  • Log in to the Composio dashboard.
  • Go to Settings → API Keys and copy your Composio API key. Use this for COMPOSIO_API_KEY.
  • Decide on a stable user identifier to scope sessions, often your email or a user ID. Use this for COMPOSIO_USER_ID.
3

Install dependencies

bash
pip install google-adk composio python-dotenv

Inside your virtual environment, install the required packages.

What's happening:

  • google-adk is Google's Agents Development Kit
  • composio connects your agent to Googlecontacts via MCP
  • python-dotenv loads environment variables
4

Set up ADK project

bash
adk create my_agent

Set up a new Google ADK project.

What's happening:

  • This creates an agent folder with a root agent file and .env file
5

Set environment variables

bash
GOOGLE_API_KEY=your-google-api-key
COMPOSIO_API_KEY=your-composio-api-key
COMPOSIO_USER_ID=your-user-id-or-email

Save all your credentials in the .env file.

What's happening:

  • GOOGLE_API_KEY authenticates with Google's Gemini models
  • COMPOSIO_API_KEY authenticates with Composio
  • COMPOSIO_USER_ID identifies the user for session management
6

Import modules and validate environment

python
import os
import warnings

from composio import Composio
from dotenv import load_dotenv
from google.adk.agents.llm_agent import Agent
from google.adk.tools.mcp_tool.mcp_session_manager import StreamableHTTPConnectionParams
from google.adk.tools.mcp_tool.mcp_toolset import McpToolset

load_dotenv()

warnings.filterwarnings("ignore", message=".*BaseAuthenticatedTool.*")

GOOGLE_API_KEY = os.getenv("GOOGLE_API_KEY")
COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY")
COMPOSIO_USER_ID = os.getenv("COMPOSIO_USER_ID")

if not GOOGLE_API_KEY:
    raise ValueError("GOOGLE_API_KEY is not set in the environment.")
if not COMPOSIO_API_KEY:
    raise ValueError("COMPOSIO_API_KEY is not set in the environment.")
if not COMPOSIO_USER_ID:
    raise ValueError("COMPOSIO_USER_ID is not set in the environment.")
What's happening:
  • os reads environment variables
  • Composio is the main Composio SDK client
  • GoogleProvider declares that you are using Google ADK as the agent runtime
  • Agent is the Google ADK LLM agent class
  • McpToolset lets the ADK agent call MCP tools over HTTP
7

Create Composio client and Tool Router session

python
composio_client = Composio(api_key=COMPOSIO_API_KEY)

composio_session = composio_client.create(
    user_id=COMPOSIO_USER_ID,
    toolkits=["googlecontacts"],
)

COMPOSIO_MCP_URL = composio_session.mcp.url,
print(f"Composio MCP URL: {COMPOSIO_MCP_URL}")
What's happening:
  • Authenticates to Composio with your API key
  • Declares Google ADK as the provider
  • Spins up a short-lived MCP endpoint for your user and selected toolkit
  • Stores the MCP HTTP URL for the ADK MCP integration
8

Set up the McpToolset and create the Agent

python
composio_toolset = McpToolset(
    connection_params=StreamableHTTPConnectionParams(
        url=COMPOSIO_MCP_URL,
        headers={"x-api-key": COMPOSIO_API_KEY}
    )
)

root_agent = Agent(
    model="gemini-2.5-flash",
    name="composio_agent",
    description="An agent that uses Composio tools to perform actions.",
    instruction=(
        "You are a helpful assistant connected to Composio. "
        "You have the following tools available: "
        "COMPOSIO_SEARCH_TOOLS, COMPOSIO_MULTI_EXECUTE_TOOL, "
        "COMPOSIO_MANAGE_CONNECTIONS, COMPOSIO_REMOTE_BASH_TOOL, COMPOSIO_REMOTE_WORKBENCH. "
        "Use these tools to help users with Googlecontacts operations."
    ),
    tools=[composio_toolset],
)

print("\nAgent setup complete. You can now run this agent directly ;)")
What's happening:
  • Connects the ADK agent to the Composio MCP endpoint through McpToolset
  • Uses Gemini as the model powering the agent
  • Lists exact tool names in instruction to reduce misnamed tool calls
9

Run the agent

bash
# Run in CLI mode
adk run my_agent

# Or run in web UI mode
adk web

Execute the agent from the project root. The web command opens a web portal where you can chat with the agent.

What's happening:

  • adk run runs the agent in CLI mode
  • adk web . opens a web UI for interactive testing

Complete Code

Here's the complete code to get you started with Googlecontacts and Google ADK:

python
import os
import warnings

from composio import Composio
from composio_google import GoogleProvider
from dotenv import load_dotenv
from google.adk.agents.llm_agent import Agent
from google.adk.tools.mcp_tool.mcp_session_manager import StreamableHTTPConnectionParams
from google.adk.tools.mcp_tool.mcp_toolset import McpToolset

load_dotenv()
warnings.filterwarnings("ignore", message=".*BaseAuthenticatedTool.*")

GOOGLE_API_KEY = os.getenv("GOOGLE_API_KEY")
COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY")
COMPOSIO_USER_ID = os.getenv("COMPOSIO_USER_ID")

if not GOOGLE_API_KEY:
    raise ValueError("GOOGLE_API_KEY is not set in the environment.")
if not COMPOSIO_API_KEY:
    raise ValueError("COMPOSIO_API_KEY is not set in the environment.")
if not COMPOSIO_USER_ID:
    raise ValueError("COMPOSIO_USER_ID is not set in the environment.")

composio_client = Composio(api_key=COMPOSIO_API_KEY, provider=GoogleProvider())

composio_session = composio_client.create(
    user_id=COMPOSIO_USER_ID,
    toolkits=["googlecontacts"],
)

COMPOSIO_MCP_URL = composio_session.mcp.url


composio_toolset = McpToolset(
    connection_params=StreamableHTTPConnectionParams(
        url=COMPOSIO_MCP_URL,
        headers={"x-api-key": COMPOSIO_API_KEY}
    )
)

root_agent = Agent(
    model="gemini-2.5-flash",
    name="composio_agent",
    description="An agent that uses Composio tools to perform actions.",
    instruction=(
        "You are a helpful assistant connected to Composio. "
        "You have the following tools available: "
        "COMPOSIO_SEARCH_TOOLS, COMPOSIO_MULTI_EXECUTE_TOOL, "
        "COMPOSIO_MANAGE_CONNECTIONS, COMPOSIO_REMOTE_BASH_TOOL, COMPOSIO_REMOTE_WORKBENCH. "
        "Use these tools to help users with Googlecontacts operations."
    ),  
    tools=[composio_toolset],
)

print("\nAgent setup complete. You can now run this agent directly ;)")

Conclusion

You've successfully integrated Googlecontacts with the Google ADK through Composio's MCP Tool Router. Your agent can now interact with Googlecontacts using natural language commands.

Key takeaways:

  • The Tool Router approach dynamically routes requests to the appropriate Googlecontacts tools
  • Environment variables keep your credentials secure and separate from code
  • Clear agent instructions reduce tool calling errors
  • The ADK web UI provides an interactive interface for testing and development

You can extend this setup by adding more toolkits to the toolkits array in your session configuration.

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 Agent SDK logo

Claude Agent SDK

Use Googlecontacts MCP with Claude Agent 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

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. Google ADK 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.

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