How to integrate Mixmax MCP with Google ADK

This guide walks you through connecting Mixmax to Google ADK using the Composio tool router. By the end, you'll have a working Mixmax agent that can get all mixmax emails tracked today, send a mixmax sequence to new leads, list mixmax meetings scheduled for next week through natural language commands. This guide will help you understand how to give your Google ADK agent real control over a Mixmax account through Composio's Mixmax MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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Mixmax

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Mixmax is a top sales engagement platform for Gmail, offering email tracking, scheduling, and workflow automation. Teams use it to boost productivity and streamline sales communications.

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Introduction

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

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

Also integrate Mixmax with

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

TL;DR

Here's what you'll learn:

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

The Mixmax MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Mixmax account. It provides structured and secure access so your agent can perform Mixmax operations on your behalf.

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 Mixmax 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=["mixmax"],
)

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 Mixmax 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 Mixmax 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=["mixmax"],
)

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

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

Conclusion

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

Key takeaways:

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

Add Contact to Group

Tool to add a contact to a contact group.

Add Email to Unsubscribe List

Tool to add an email address to the Mixmax unsubscribe list.

Add Snippet to Tag

Tool to add a snippet to a snippet tag in Mixmax.

Add Team Members

Tool to add one or more members to a Mixmax team by email.

Cancel Sequence Recipients

Tool to cancel specific recipients across all sequences.

Create Code Snippet

Tool to create a new Formatted Code enhancement in Mixmax.

Create Contact

Tool to create a new contact in Mixmax.

Create Contact Group

Tool to create a new contact group in Mixmax.

Create Contact Note

Tool to create a note for a contact.

Create insights report

Tool to create a new insights report in Mixmax.

Create Integration Enhancement

Tool to create a new enhancement integration in Mixmax.

Create Integrations Command

Tool to create a new slash command that will be visible to only your account.

Create Integrations Sidebars

Tool to create a new sidebar integration in Mixmax.

Create Link Resolver

Tool to create a new link resolver integration in Mixmax.

Create Livefeed Search

Tool to create a new saved search in the Mixmax livefeed.

Create Message

Tool to create a draft Mixmax message (email).

Create Rule

Tool to create a new Mixmax rule/webhook.

Create Rule Action

Tool to create a new action for a Mixmax rule.

Create Sequence Folder

Tool to create a new sequence folder in Mixmax.

Create Snippet Tag

Tool to create a new snippet tag (folder) in Mixmax.

Create Team

Tool to create a new team in Mixmax.

Delete Contact

Tool to delete a contact by ID.

Delete Contact Group

Tool to delete a contact group by ID.

Delete Contact Note

Tool to delete a note from a contact by its ID.

Delete Integration Enhancement

Tool to delete an integration enhancement by its ID.

Delete slash command

Tool to delete a slash command by its unique ID from Mixmax integrations.

Delete Integrations Sidebars

Tool to delete a sidebar integration by its ID.

Delete Link Resolver

Tool to permanently delete a link resolver by its ID.

Delete Rule

Tool to delete a Mixmax rule by its ID.

Delete Rule Action

Tool to delete an action from a Mixmax rule.

Delete Sequence Folder

Tool to permanently delete a sequence folder by its ID.

Delete Snippet

Tool to delete a snippet by moving it to trash.

Delete Snippet Tag

Tool to delete a snippet tag by its unique ID.

Delete Team

Tool to delete a team by its ID.

Delete Unsubscribe

Tool to remove an email address from the Mixmax unsubscribe list.

Get Code Snippet

Tool to fetch a single Formatted Code enhancement by its unique ID.

Get contact by ID

Tool to retrieve a single contact by ID from Mixmax.

Get Contact Group

Tool to retrieve a single contact group by ID.

Get Contactgroup Contacts

Tool to retrieve membership for a contact group in Mixmax.

Get Contact Notes

Tool to retrieve notes associated with a specific contact.

Get File Requests

Tool to retrieve all file requests that you've sent out through Mixmax.

Get insights report by ID

Tool to retrieve a single insights report by ID from Mixmax.

Get Integrations Commands

Tool to retrieve a list of Slash Commands that you have access to in Mixmax.

Get Integrations Enhancements

Tool to retrieve a list of enhancements that you have access to in Mixmax.

Get Link Resolver Integrations

Tool to retrieve all link resolver integrations configured in Mixmax.

Get Integrations Sidebars

Tool to retrieve a list of sidebar integrations that you have access to in Mixmax.

Get live feed activity data

Tool to retrieve live feed activity data from Mixmax.

Get Livefeed Events

Tool to retrieve events for a specific message in the live feed.

Get Meeting Invites

Tool to retrieve a paginated list of meeting invites from Mixmax.

Get Message by ID

Tool to retrieve a single message by its unique ID.

Get Messages

Tool to retrieve messages (emails) from Mixmax.

Get Polls

Tool to retrieve polls created in Mixmax along with voting information.

Get Q&A Surveys

Tool to retrieve Question & Answer surveys data from Mixmax.

Get Reports Data Table

Tool to query analytics data for messages and meetings from Mixmax reports.

Get all rules

Tool to retrieve all Mixmax rules for the authenticated user.

Get Rule by ID

Tool to fetch a single rule by its unique ID from Mixmax.

Get Salesforce account information

Tool to retrieve Salesforce account information for the authenticated user.

Get Sequence Folder by ID

Tool to retrieve a single sequence folder by its ID from Mixmax.

Get Snippet by ID

Tool to fetch a single snippet by its unique ID from Mixmax.

Get Snippet Tag

Tool to retrieve a single snippet tag (folder) by its unique ID.

Get Snippet Tags

Tool to retrieve a list of snippet tags (folders) from Mixmax.

Get Team Members

Tool to retrieve all members of a Mixmax team.

Get Teams

Tool to retrieve all teams that the authenticated user is a member of.

Get Unsubscribes

Tool to retrieve a list of unsubscribed email addresses from Mixmax.

Get Current User Preferences

Tool to retrieve preferences for the currently authenticated user.

Get Current User

Tool to retrieve information about the currently authenticated user.

Get Yes/No Questions

Tool to retrieve Yes/No questions created in Mixmax.

List Code Snippets

Tool to list all Formatted Code enhancements you've created.

List Contact Groups

Tool to retrieve a list of contact groups from Mixmax.

List Contacts

Tool to retrieve all Mixmax contacts (people you've emailed using Mixmax).

List insights reports

Tool to retrieve all insights reports from Mixmax.

List Rule Actions

Tool to list all actions for a given Mixmax rule.

List Sequence Folders

Tool to retrieve a list of all sequence folders from Mixmax.

List Sequences

Tool to retrieve a list of sequences from Mixmax.

List Snippets

Tool to list templates or snippets that you have access to (including those shared with you).

Update Rule by ID

Tool to update a rule by its unique ID in Mixmax.

Update Rule Action

Tool to update an action within a Mixmax rule.

Update Snippet by ID

Tool to update a snippet by its unique ID in Mixmax.

Post Reports Data Table

Tool to generate a table report with specified analytics data for messages, meetings, or sequences.

Query Contacts

Tool to search for matching contacts across multiple sources including Mixmax, Google Directory, and Salesforce (contacts, leads, accounts, and opportunities).

Remove Contact from Group

Tool to remove a contact from a contact group.

Remove Team Member

Tool to remove a member from a Mixmax team.

Search Sequences

Tool to search sequence recipients by email and sequenceId from Mixmax.

Send Message Draft

Tool to send a message draft by its unique ID.

Send Snippet as Email

Tool to send a snippet as an email to specified recipients.

Send Test Message

Tool to send a test Mixmax message to the authenticated user, resolving any variables.

Update Appointment Link Calendar Name

Tool to update your custom "Mixmax Calendar" vanity URL name.

Update Contact

Tool to update a specific contact by ID.

Update Contact Group

Tool to update a contact group by ID.

Update Contact Note

Tool to update a note on a contact by its ID.

Update insights report

Tool to update an existing insights report in Mixmax.

Update Message by ID

Tool to update a message by its unique ID.

Update Sequence Folder by ID

Tool to update a sequence folder by its unique ID in Mixmax.

Update Snippet Tag

Tool to update a snippet tag (folder) by its unique ID.

Update Team

Tool to update a team's information by ID.

Update Current User Preferences

Tool to update preferences for the currently authenticated user.

FRAMEWORKS

How to build Mixmax MCP Agent with another framework

OpenAI Agents SDK

Use Mixmax MCP with OpenAI Agents SDK

Claude Agent SDK

Use Mixmax MCP with Claude Agent SDK

Claude Code

Use Mixmax MCP with Claude Code

Claude Cowork

Use Mixmax MCP with Claude Cowork

Codex

Use Mixmax MCP with Codex

OpenClaw

Use Mixmax MCP with OpenClaw

Hermes

Use Mixmax MCP with Hermes

CLI

Use Mixmax MCP with CLI

LangChain

Use Mixmax MCP with LangChain

Vercel AI SDK

Use Mixmax MCP with Vercel AI SDK

Mastra AI

Use Mixmax MCP with Mastra AI

LlamaIndex

Use Mixmax MCP with LlamaIndex

CrewAI

Use Mixmax MCP with CrewAI

MORE TOOLKITS

Explore Other Toolkits

Toolkit marketplace

Gmail

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Outlook

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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.

FAQ

Frequently asked questions

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

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

Start with Mixmax.It takes 30 seconds.

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

Start building

Customer stories

Teams ship real agents on Composio

GET STARTED FOR FREE BOOK A DEMO

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

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

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

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

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

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

Co-Founder, Ingram Technologies

How to integrate Mixmax MCP with Google ADK

Connect Mixmax without auth hassles

Introduction

Also integrate Mixmax with

TL;DR

What is Google ADK?

What is the Mixmax 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 Mixmax MCP Agent with another framework

OpenAI Agents SDK

Claude Agent SDK

Claude Code

Claude Cowork

Codex

OpenClaw

Hermes

CLI

LangChain

Vercel AI SDK

Mastra AI

LlamaIndex

CrewAI

Explore Other Toolkits

Gmail

Outlook

Google Sheets

Notion

Frequently asked questions

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

Can I use Tool Router MCP with Google ADK?+

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

How safe is my data with Composio Tool Router?+

Start with Mixmax.It takes 30 seconds.

Teams ship real agents on Composio