How to integrate Nutshell MCP with Google ADK

Connect Google ADK to Nutshell MCP. List all open deals in the current pipeline, add a new contact with name and email, and more using natural language, with authentication handled for you.

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Nutshell

Basic

Nutshell is a flexible CRM and email marketing platform for small businesses. It helps manage contacts, sales pipelines, and customer relationships efficiently.

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Introduction

This guide walks you through connecting Nutshell to Google ADK using the Composio tool router. By the end, you'll have a working Nutshell agent that can list all open deals in the current pipeline, add a new contact with name and email, update the status of deal 'acme corp' to won through natural language commands.

This guide will help you understand how to give your Google ADK agent real control over a Nutshell account through Composio's Nutshell MCP server.

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

Also integrate Nutshell with

Claude Code Claude Cowork OpenAI Agents SDK Claude Agent SDK Codex OpenClaw Hermes Atomic Agent LangChain Vercel AI SDK Mastra AI LlamaIndex CrewAI Pydantic AI AutoGen

TL;DR

Here's what you'll learn:

Get a Nutshell account set up and connected to Composio
Install the Google ADK and Composio packages
Create a Composio Tool Router session for Nutshell
Build an agent that connects to Nutshell through MCP
Interact with Nutshell 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 Nutshell MCP server, and what's possible with it?

The Nutshell MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Nutshell account. It provides structured and secure access to your accounts, contacts, leads, and sales records, so your agent can create accounts, add contacts, manage leads, retrieve customer details, and update sales information on your behalf.

Account creation and lookup: Have your agent create company accounts and retrieve existing account details when you need customer context.
Contact management: Let the agent add new contacts, review your contact list, retrieve specific contact details, and update existing records.
Lead creation: Direct your agent to create new leads in Nutshell as prospects enter your sales pipeline.
Lead review and updates: Instruct your agent to list leads, retrieve specific lead details, and update records as sales conversations progress.
Sales record maintenance: Have your agent keep account, contact, and lead information current as customer relationships develop.

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:

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

Step-by-step Guide

Step by step09 STEPS

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

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.

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 Nutshell via MCP
python-dotenv loads environment variables

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

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

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

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=["nutshell"],
)

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

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 Nutshell 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

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 Nutshell 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=["nutshell"],
)

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 Nutshell operations."
    ),  
    tools=[composio_toolset],
)

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

Conclusion

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

Key takeaways:

The Tool Router approach dynamically routes requests to the appropriate Nutshell 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 Nutshell action and event your agent gets out of the box.

Create Accounts

Tool to create one or more accounts in Nutshell.

Create Custom Field for Accounts

Tool to create a custom field for accounts in Nutshell.

Create Activities

Tool to create one or more activities in Nutshell CRM.

Create Contacts

Tool to create one or more contacts in Nutshell CRM.

Create Lead

Tool to create a lead in Nutshell CRM using the JSON-RPC API.

Create Custom Field for Leads

Tool to create a custom field for leads in Nutshell.

Create Notes

Tool to create a note in Nutshell.

Create Sources

Tool to create new sources in Nutshell CRM.

Create Tags

Tool to create one or more tags in Nutshell.

Delete Account

Tool to delete an account from Nutshell.

Delete Contact

Tool to delete a contact by ID.

Delete Lead

Tool to delete a lead from Nutshell CRM.

Delete Note

Tool to delete a note from Nutshell CRM.

Delete Product Map

Tool to delete a product on a lead.

Delete Task

Tool to delete a task from Nutshell CRM.

Edit Nutshell Account

Tool to edit an existing account in Nutshell CRM.

Get Account

Tool to retrieve an account from Nutshell.

Get Account Custom Fields

Tool to retrieve custom fields for a specific account in Nutshell.

Get Activity

Tool to retrieve a single activity by ID from Nutshell CRM.

Get Contact

Tool to retrieve a specific contact by ID from Nutshell CRM.

Get Contact Custom Fields

Tool to retrieve custom fields for a specific contact in Nutshell.

Get Lead

Tool to retrieve a specific lead by ID from Nutshell CRM.

Get Lead's Custom Fields

Tool to retrieve custom fields for a specific lead in Nutshell CRM.

Get Note

Tool to retrieve a single note by ID from Nutshell CRM.

Get Product Category

Tool to retrieve a single product category by ID from Nutshell CRM.

Get Task

Tool to retrieve a single task by ID from Nutshell CRM.

List Account Custom Field Attributes

Tool to retrieve all account custom field attributes from Nutshell CRM.

List Account Fields

Tool to retrieve all available fields for accounts in Nutshell.

List Accounts

Tool to retrieve list items for all accounts in Nutshell CRM.

List Account Types

Tool to retrieve a list of all account types from Nutshell CRM.

List Activities

Tool to retrieve a list of activities from Nutshell CRM.

List Activity Types

Tool to retrieve a list of all activity types from Nutshell CRM.

List Competitor Maps

Tool to get a list of lead-competitor relationships from Nutshell CRM.

List Competitors

Tool to get a list of competitors from Nutshell CRM.

List Contacts

Tool to get a list of contacts from Nutshell CRM.

List Contact Custom Field Attributes

Tool to retrieve all available custom field attributes for contacts in Nutshell.

List Contact Fields

Tool to retrieve all available fields for contacts in Nutshell.

List Contacts

Tool to retrieve list items for all contacts in Nutshell CRM.

List Deleted Events

Tool to get a feed of deletion events from Nutshell CRM.

List Editions

Tool to retrieve a list of all editions from Nutshell CRM.

List Events

Tool to get a list of events from Nutshell CRM.

List Filters

Tool to get saved filters from Nutshell CRM.

List Forms

Tool to get all forms from Nutshell.

List Industries

Tool to retrieve a list of all industries from Nutshell CRM.

List Invoices

Tool to get a list of invoices from Nutshell CRM.

List Leads

Tool to get a list of leads from Nutshell CRM.

List Lead Custom Field Attributes

Tool to retrieve all applicable custom field attributes for leads in Nutshell CRM.

List Lead Fields

Tool to retrieve all available fields for leads in Nutshell.

List Leads

Tool to retrieve list items for all leads in Nutshell CRM.

Get Leads Report

Tool to get reports for leads from Nutshell CRM.

List Lead Stages

Tool to retrieve all stages associated with a specific lead in Nutshell CRM.

List Markets

Tool to retrieve a list of all markets from Nutshell CRM.

List Notes

Tool to get a list of notes from Nutshell CRM.

List Lead Outcomes

Tool to retrieve a list of lead outcomes from Nutshell CRM.

List Product Categories

Tool to get a list of all product categories from Nutshell CRM.

List Product Maps

Tool to get a list of lead products from Nutshell CRM.

List Products

Tool to get a list of products from Nutshell CRM.

List Quotes

Tool to get a list of quotes from Nutshell CRM.

List Sources

Tool to retrieve a list of sources from Nutshell CRM.

List Stages

Tool to retrieve a list of all stages from Nutshell CRM.

List Pipelines

Tool to retrieve a list of all pipelines (stagesets) from Nutshell CRM.

List Tags

Tool to retrieve a list of tags from Nutshell CRM.

List Territories

Tool to retrieve a list of all territories from Nutshell CRM.

List Users

Tool to get a list of all users from Nutshell CRM.

Reopen Lead

Tool to reopen a lead in Nutshell CRM.

Set Lead Pipeline

Tool to set the pipeline (stageset) for a lead in Nutshell CRM.

Undelete Account

Tool to undelete a previously deleted account in Nutshell.

Undelete Contact

Tool to undelete a previously deleted contact in Nutshell CRM.

Undelete Lead

Tool to undelete a previously deleted lead from Nutshell CRM.

Undelete Note

Tool to undelete a previously deleted note in Nutshell CRM.

Undelete Source

Tool to undelete a source by ID.

Undelete Tag

Tool to undelete a previously deleted tag in Nutshell.

Update Account with JSON Patch

Tool to update an account in Nutshell using JSON Patch operations.

Update Nutshell Contact

Tool to update a contact using JSON Patch operations.

Update Lead

Tool to update a lead in Nutshell CRM using JSON Patch operations.

Update Lead Status

Tool to update the status of a lead in Nutshell CRM.

Update Task with JSON Patch

Tool to update a task in Nutshell using JSON Patch operations.

Watch Lead

Tool to watch a lead in Nutshell CRM.

FRAMEWORKS

How to build Nutshell MCP Agent with another framework

Claude Code

Use Nutshell MCP with Claude Code

Claude Cowork

Use Nutshell MCP with Claude Cowork

OpenAI Agents SDK

Use Nutshell MCP with OpenAI Agents SDK

Claude Agent SDK

Use Nutshell MCP with Claude Agent SDK

Codex

Use Nutshell MCP with Codex

OpenClaw

Use Nutshell MCP with OpenClaw

Hermes

Use Nutshell MCP with Hermes

Atomic Agent

Use Nutshell MCP with Atomic Agent

LangChain

Use Nutshell MCP with LangChain

Vercel AI SDK

Use Nutshell MCP with Vercel AI SDK

Mastra AI

Use Nutshell MCP with Mastra AI

LlamaIndex

Use Nutshell MCP with LlamaIndex

CrewAI

Use Nutshell MCP with CrewAI

Pydantic AI

Use Nutshell MCP with Pydantic AI

AutoGen

Use Nutshell MCP with AutoGen

MORE TOOLKITS

Explore Other Toolkits

Toolkit marketplace

HubSpot

Oauth2Api Key

HubSpot is an all-in-one marketing, sales, and customer service platform. It lets teams nurture leads, automate outreach, and track every customer interaction in one place.

Pipedrive

Oauth2Api Key

Pipedrive is a sales management platform offering pipeline visualization, lead tracking, and workflow automation. It helps sales teams keep deals moving forward efficiently and never miss a follow-up.

Salesforce

Oauth2S2s Oauth2

Salesforce is a leading CRM platform that helps businesses manage sales, service, and marketing. It centralizes customer data, enabling teams to drive growth and build strong relationships.

Apollo

Api Key

Apollo is a CRM and lead generation platform that helps businesses discover contacts and manage sales pipelines. Use it to streamline customer outreach and track your deals from one place.

FAQ

Frequently asked questions

With a standalone Nutshell MCP server, the agents and LLMs can only access a fixed set of Nutshell tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Nutshell 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 Nutshell tools.

Yes, absolutely. You can configure which Nutshell 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 Nutshell data and credentials are handled as safely as possible.

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How to integrate Nutshell MCP with Google ADK

Connect Nutshell without auth hassles

Introduction

Also integrate Nutshell with

TL;DR

What is Google ADK?

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

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

What is Composio SDK?

How the Composio SDK works

Step-by-step Guide

Prerequisites

Getting API Keys for Google and Composio

Install dependencies

Set up ADK project

Set environment variables

Import modules and validate environment

Create Composio client and Tool Router session

Set up the McpToolset and create the Agent

Run the agent

Complete Code

Conclusion

Supported Tools

How to build Nutshell MCP Agent with another framework

Claude Code

Claude Cowork

OpenAI Agents SDK

Claude Agent SDK

Codex

OpenClaw

Hermes

Atomic Agent

LangChain

Vercel AI SDK

Mastra AI

LlamaIndex

CrewAI

Pydantic AI

AutoGen

Explore Other Toolkits

HubSpot

Pipedrive

Salesforce

Apollo

Frequently asked questions

What are the differences in Tool Router MCP and Nutshell MCP?+

Can I use Tool Router MCP with Google ADK?+

Can I manage the permissions and scopes for Nutshell while using Tool Router?+

How safe is my data with Composio Tool Router?+

Start with Nutshell.It takes 30 seconds.