How to integrate Clientary MCP with Google ADK

Connect Google ADK to Clientary MCP. Create new invoice for a client, list all active projects this month, and more using natural language, with authentication handled for you.

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Clientary

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Clientary is a platform for managing clients, invoices, projects, proposals, and more. It streamlines client work and saves you serious admin time.

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Introduction

This guide walks you through connecting Clientary to Google ADK using the Composio tool router. By the end, you'll have a working Clientary agent that can create new invoice for a client, list all active projects this month, send payment reminder to overdue clients through natural language commands.

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

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

TL;DR

Here's what you'll learn:

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

The Clientary MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Clientary account. It provides structured and secure access to your clients, contacts, leads, projects, tasks, hours, invoices, estimates, payments, expenses, and recurring schedules, so your agent can create client records, manage projects, track work, handle invoices, and maintain sales information on your behalf.

Client and contact management: Have your agent create, review, update, or remove clients and their contacts as your business relationships change.
Lead and estimate tracking: Let the agent create and update leads, list estimates, and remove leads that are no longer relevant.
Project and task coordination: Direct your agent to create, review, update, or delete projects, then create and update tasks to keep work organized.
Time and billing management: Instruct your agent to record project hours, create and update invoices, review invoice details, and remove incorrect payments or time entries.
Recurring billing and expense cleanup: Have your agent create or remove recurring invoice schedules, delete expenses, and remove outdated client payment profiles.

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 Clientary 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=["clientary"],
)

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 Clientary 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 Clientary 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=["clientary"],
)

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

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

Conclusion

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

Key takeaways:

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

Create Client

Tool to create a new client record in Clientary.

Create Contact

Tool to create a new contact within a specified client.

Create Expense

Tool to create a new expense record in Clientary to track expenditures within your account.

Create Lead

Tool to create a new lead record in Clientary.

Create Project

Tool to create a new project in Clientary with name and rate.

Create Task

Tool to create a new task in Clientary.

Delete Client

Tool to remove a client and all associated projects, invoices, estimates, and contacts.

Delete Lead

Tool to permanently delete a lead and all associated Estimates and Contacts.

Delete Payment

Tool to remove an existing payment from an invoice.

Delete Payment Profile

Tool to remove a specific payment profile from a client's account.

Delete Recurring Schedule

Tool to remove a recurring schedule by its identifier.

Get Client

Tool to fetch details for a specific client using its ID.

Get Contact

Tool to retrieve a single contact by its ID.

Get Estimate

Tool to retrieve details for a single estimate by ID.

Get Expense

Tool to retrieve details for a single expense record in Clientary.

Get Hour Entry

Tool to obtain details about a specific time entry in Clientary.

Get Invoice

Tool to retrieve detailed information for a specific invoice by ID.

Get Lead

Tool to retrieve a single lead by its ID.

Get Project

Tool to retrieve a single project by its identifier.

Get Staff

Tool to retrieve a single staff member by their ID.

Get Task

Tool to retrieve a specific task by its ID.

List Client Contacts

Tool to retrieve all contacts for a specific client with pagination support.

List Client Expenses

Tool to retrieve all expenses for a specific client within an optional date range.

List Client Invoices

Tool to retrieve all invoices for a specific client with pagination support (30 results per page).

List Client Projects

Tool to retrieve all projects associated with a specific client with pagination support (10 results per page).

List Clients

Tool to retrieve all clients with pagination support (10 results per page).

List Expenses

Tool to retrieve expenses by date range (defaults to current fiscal year).

List Leads

Tool to retrieve all leads with pagination support.

List Payments

Tool to retrieve all payments with pagination support (30 results per page).

List Project Estimates

Tool to retrieve estimates scoped to a particular project with pagination support (30 results per page).

List Project Expenses

Tool to retrieve all expenses for a specific project within an optional date range.

List Project Hours

Tool to retrieve all time tracking entries logged against a specific project.

List Project Invoices

Tool to retrieve all invoices linked to a specific project with pagination support (30 results per page).

List Projects

Tool to retrieve all projects with pagination support (10 results per page).

List Staff

Tool to retrieve all staff members for an account.

List Tasks

Tool to retrieve all tasks with pagination support (50 results per page).

Send Invoice Message

Tool to send an invoice message to recipients via email.

Update Client

Tool to update an existing client record in Clientary with partial or complete field modifications.

Update Expense

Tool to update an existing expense record in Clientary with partial or complete field modifications.

Update Hour Entry

Tool to modify an existing time entry in Clientary with partial or complete field updates.

Update Project

Tool to update an existing project in Clientary with partial or complete field modifications.

Update Task

Tool to update an existing task in Clientary with partial or complete field modifications.

FRAMEWORKS

How to build Clientary MCP Agent with another framework

Claude Code

Use Clientary MCP with Claude Code

Cursor

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ChatGPT

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Claude Cowork

Use Clientary MCP with Claude Cowork

Antigravity

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OpenAI Agents SDK

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Claude Agent SDK

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Grok Bot

Use Clientary MCP with Grok Bot

Codex

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Grok Build

Use Clientary MCP with Grok Build

VS Code

Use Clientary MCP with VS Code

OpenCode

Use Clientary MCP with OpenCode

OpenClaw

Use Clientary MCP with OpenClaw

Hermes

Use Clientary MCP with Hermes

Atomic Agent

Use Clientary MCP with Atomic Agent

LangChain

Use Clientary MCP with LangChain

Vercel AI SDK

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Mastra AI

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LlamaIndex

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CrewAI

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Pydantic AI

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AutoGen

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MORE TOOLKITS

Explore Other Toolkits

Toolkit marketplace

Google Sheets

Oauth2

Google Sheets is a cloud-based spreadsheet tool for real-time collaboration and data analysis. It lets teams work together from anywhere, updating information instantly.

Notion

Oauth2Api Key

Notion is a collaborative workspace for notes, docs, wikis, and tasks. It streamlines team knowledge, project tracking, and workflow customization in one place.

Airtable

Oauth2Api Key

Airtable combines the flexibility of spreadsheets with the power of a database for easy project and data management. Teams use Airtable to organize, track, and collaborate with custom views and automations.

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.

FAQ

Frequently asked questions

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

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

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How to integrate Clientary MCP with Google ADK

Connect Clientary without auth hassles

Introduction

Also integrate Clientary with

TL;DR

What is Google ADK?

What is the Clientary 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 Clientary MCP Agent with another framework

Claude Code

Cursor

ChatGPT

Claude Cowork

Antigravity

OpenAI Agents SDK

Claude Agent SDK

Grok Bot

Codex

Grok Build

VS Code

OpenCode

OpenClaw

Hermes

Atomic Agent

LangChain

Vercel AI SDK

Mastra AI

LlamaIndex

CrewAI

Pydantic AI

AutoGen

Explore Other Toolkits

Google Sheets

Notion

Airtable

HubSpot

Frequently asked questions

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

Can I use Tool Router MCP with Google ADK?+

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

How safe is my data with Composio Tool Router?+

Start with Clientary.It takes 30 seconds.