# How to integrate Zoho mail MCP with Google ADK

```json
{
  "title": "How to integrate Zoho mail MCP with Google ADK",
  "toolkit": "Zoho mail",
  "toolkit_slug": "zoho_mail",
  "framework": "Google ADK",
  "framework_slug": "google-adk",
  "url": "https://composio.dev/toolkits/zoho_mail/framework/google-adk",
  "markdown_url": "https://composio.dev/toolkits/zoho_mail/framework/google-adk.md",
  "updated_at": "2026-05-12T10:31:31.768Z"
}
```

## Introduction

This guide walks you through connecting Zoho mail to Google ADK using the Composio tool router. By the end, you'll have a working Zoho mail agent that can send a follow-up email to yesterday's meeting attendees, list unread emails from your manager, schedule a calendar event from an email through natural language commands.
This guide will help you understand how to give your Google ADK agent real control over a Zoho mail account through Composio's Zoho mail MCP server.
Before we dive in, let's take a quick look at the key ideas and tools involved.

## Also integrate Zoho mail with

- [ChatGPT](https://composio.dev/toolkits/zoho_mail/framework/chatgpt)
- [OpenAI Agents SDK](https://composio.dev/toolkits/zoho_mail/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/zoho_mail/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/zoho_mail/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/zoho_mail/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/zoho_mail/framework/codex)
- [Cursor](https://composio.dev/toolkits/zoho_mail/framework/cursor)
- [VS Code](https://composio.dev/toolkits/zoho_mail/framework/vscode)
- [OpenCode](https://composio.dev/toolkits/zoho_mail/framework/opencode)
- [OpenClaw](https://composio.dev/toolkits/zoho_mail/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/zoho_mail/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/zoho_mail/framework/cli)
- [LangChain](https://composio.dev/toolkits/zoho_mail/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/zoho_mail/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/zoho_mail/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/zoho_mail/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/zoho_mail/framework/crew-ai)

## TL;DR

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

The Zoho mail MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Zoho mail account. It provides structured and secure access to your mailbox, so your agent can perform actions like searching emails, sending messages, managing folders, organizing conversations, and handling attachments on your behalf.
- Smart email search and filtering: Ask your agent to find emails based on sender, subject, keywords, or date ranges for quick information retrieval.
- Automated composing and sending: Let your agent draft and send new emails, reply to existing threads, or create message templates to streamline communication.
- Folder and label organization: Have your agent organize your inbox by moving messages to folders, applying tags, or archiving threads for a clutter-free workspace.
- Attachment management: Retrieve, download, or send attachments through your agent—making file sharing and access seamless within your email workflow.
- Bulk message actions: Instruct your agent to mark emails as read or unread, star important messages, or clean up your inbox by deleting or archiving in bulk.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `ZOHO_MAIL_ACCOUNTS_LIST_ACCOUNTS` | List Zoho Mail Accounts | Retrieves all Zoho Mail accounts associated with the authenticated user. Returns account details including accountId (required for other mail operations), email addresses, storage information, account status, user preferences, and security settings. Use this action first to get the accountId needed for subsequent mailbox, message, folder, and email operations. The accountId is a unique identifier for each mail account. Typical workflow: List accounts → Get accountId → Use accountId in other mail operations. |
| `ZOHO_MAIL_DOMAIN_OPERATIONS` | Domain Operations | Tool to perform domain operations like verify, set primary domain, hosting, aliases, MX/SPF checks, DKIM management, and notifications. Use after creating or retrieving a domain. |
| `ZOHO_MAIL_GET_ALL_BOOKMARKS` | Get All Bookmarks | Tool to retrieve all personal bookmarks from a Zoho Mail account. Use when you need to fetch saved bookmarks/links with support for pagination and field filtering. |
| `ZOHO_MAIL_GROUPS_DELETE_GROUP_BULK` | Delete Groups in Bulk | Delete multiple groups in a single API call. This action permanently removes the specified groups from your Zoho Mail organization. Use this when you need to: - Remove multiple obsolete or unused groups at once - Clean up groups after organizational restructuring - Batch delete groups for administrative purposes Note: Deleted groups cannot be recovered. Ensure you have the correct group IDs before deletion. |
| `ZOHO_MAIL_GROUPS_DELETE_GROUP_BY_ZGID` | Delete Group | Tool to delete a specific mail group by its zgid. Use when you need to remove a group from your organization after confirming the IDs. |
| `ZOHO_MAIL_MESSAGES_CREATE_DRAFT` | Create Email Draft | Tool to create and save an email draft in Zoho Mail without sending it. Use when composing emails that need to be saved for later editing or sending. |
| `ZOHO_MAIL_MESSAGES_GET_MESSAGE_CONTENT` | Get Message Content | Tool to retrieve the full content/body of a specific Zoho Mail email. Use when you need to fetch the complete email content after listing or searching messages, as list/search endpoints typically return only metadata/summary. |
| `ZOHO_MAIL_MESSAGES_LIST_EMAILS` | List Emails | Tool to retrieve a list of emails from a Zoho Mail account folder. Use when you need to fetch emails from inbox or specific folder, with support for filtering by read status, attachments, flags, and pagination. |
| `ZOHO_MAIL_MESSAGES_REPLY_TO_EMAIL` | Reply to Email | Tool to reply to an existing email via Zoho Mail API. Use when you need to send a reply to a received email message, maintaining email threading. |
| `ZOHO_MAIL_MESSAGES_SEND_EMAIL` | Send Email | Tool to send an email via Zoho Mail API. Use when you need to send emails immediately to recipients. |
| `ZOHO_MAIL_ORGANIZATION_GET_USER_STORAGE_DETAILS` | Get Organization User Storage Details | Tool to retrieve storage details for a specific user in the organization. Use when you need to know a user’s total and used storage quotas. |
| `ZOHO_MAIL_ORGANIZATION_UPDATE_SPAM_PROCESS_TYPE` | Update Organization Spam Process Type | Tool to update organization spam processing type. Use when changing the spam filtering strategy for an organization. |
| `ZOHO_MAIL_ORGANIZATION_UPDATE_USER_STORAGE` | Update User Storage | Updates a user's storage allocation within a Zoho Mail organization. Can modify either base storage plan or extra storage add-ons. Use this when you need to: - Change a user's base storage plan (e.g., from basic to mailPremium) - Add or modify extra storage add-ons for a user Prerequisites: You must have valid zoid (organization ID) and zuid (user ID) before calling this action. |
| `ZOHO_MAIL_SEARCH_MESSAGES` | Search Messages | Tool to search emails in a Zoho Mail account using Zoho's searchKey syntax. Use when you need to find specific emails by sender, subject, keywords, status (e.g., unread), attachments, or flags. Returns messageId and folderId needed to fetch full message content. |
| `ZOHO_MAIL_UPDATE_GROUP_SETTINGS` | Update Group Settings | Tool to update group settings. Use after group creation to adjust general or text settings. |

## Supported Triggers

None listed.

## Creating MCP Server - Stand-alone vs Composio SDK

The Zoho mail MCP server is an implementation of the Model Context Protocol that connects your AI agent to Zoho mail. It provides structured and secure access so your agent can perform Zoho mail operations on your behalf through a secure, permission-based interface.
With Composio's managed implementation, you don't have to create your own developer app. For production, if you're building an end product, we recommend using your own credentials. The managed server helps you prototype fast and go from 0-1 faster.

## Step-by-step Guide

### 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

### 1. Getting API Keys for Google and Composio

Google API Key
- Go to [Google AI Studio](https://aistudio.google.com/app/apikey) 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](https://dashboard.composio.dev?utm_source=toolkits&utm_medium=framework_docs).
- 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.

### 2. Install dependencies

Inside your virtual environment, install the required packages.
What's happening:
- google-adk is Google's Agents Development Kit
- composio connects your agent to Zoho mail via MCP
- python-dotenv loads environment variables
```bash
pip install google-adk composio python-dotenv
```

### 3. Set up ADK project

Set up a new Google ADK project.
What's happening:
- This creates an agent folder with a root agent file and .env file
```bash
adk create my_agent
```

### 4. Set environment variables

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

### 5. Import modules and validate 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
```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.")
```

### 6. Create Composio client and Tool Router session

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
```python
composio_client = Composio(api_key=COMPOSIO_API_KEY)

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

COMPOSIO_MCP_URL = composio_session.mcp.url,
print(f"Composio MCP URL: {COMPOSIO_MCP_URL}")
```

### 7. Set up the McpToolset and create the Agent

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
```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 Zoho mail operations."
    ),
    tools=[composio_toolset],
)

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

### 8. Run the agent

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
```bash
# Run in CLI mode
adk run my_agent

# Or run in web UI mode
adk web
```

## Complete Code

```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=["zoho_mail"],
)

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 Zoho mail operations."
    ),  
    tools=[composio_toolset],
)

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

## Conclusion

You've successfully integrated Zoho mail with the Google ADK through Composio's MCP Tool Router. Your agent can now interact with Zoho mail using natural language commands.
Key takeaways:
- The Tool Router approach dynamically routes requests to the appropriate Zoho mail 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.

## How to build Zoho mail MCP Agent with another framework

- [ChatGPT](https://composio.dev/toolkits/zoho_mail/framework/chatgpt)
- [OpenAI Agents SDK](https://composio.dev/toolkits/zoho_mail/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/zoho_mail/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/zoho_mail/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/zoho_mail/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/zoho_mail/framework/codex)
- [Cursor](https://composio.dev/toolkits/zoho_mail/framework/cursor)
- [VS Code](https://composio.dev/toolkits/zoho_mail/framework/vscode)
- [OpenCode](https://composio.dev/toolkits/zoho_mail/framework/opencode)
- [OpenClaw](https://composio.dev/toolkits/zoho_mail/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/zoho_mail/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/zoho_mail/framework/cli)
- [LangChain](https://composio.dev/toolkits/zoho_mail/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/zoho_mail/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/zoho_mail/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/zoho_mail/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/zoho_mail/framework/crew-ai)

## Related Toolkits

- [Gmail](https://composio.dev/toolkits/gmail) - Gmail is Google's email service with powerful spam protection, search, and G Suite integration. It keeps your inbox organized and makes communication fast and reliable.
- [Outlook](https://composio.dev/toolkits/outlook) - Outlook is Microsoft's email and calendaring platform for unified communications and scheduling. It helps users stay organized with powerful email, contacts, and calendar management.
- [Slack](https://composio.dev/toolkits/slack) - Slack is a channel-based messaging platform for teams and organizations. It helps people collaborate in real time, share files, and connect all their tools in one place.
- [Gong](https://composio.dev/toolkits/gong) - Gong is a platform for video meetings, call recording, and team collaboration. It helps teams capture conversations, analyze calls, and turn insights into action.
- [Microsoft teams](https://composio.dev/toolkits/microsoft_teams) - Microsoft Teams is a collaboration platform that combines chat, meetings, and file sharing within Microsoft 365. It keeps distributed teams connected and productive through seamless virtual communication.
- [Slackbot](https://composio.dev/toolkits/slackbot) - Slackbot is a conversational automation tool for Slack that handles reminders, notifications, and automated responses. It boosts team productivity by streamlining onboarding, answering FAQs, and managing timely alerts—all right inside Slack.
- [2chat](https://composio.dev/toolkits/_2chat) - 2chat is an API platform for WhatsApp and multichannel text messaging. It streamlines chat automation, group management, and real-time messaging for developers.
- [Agent mail](https://composio.dev/toolkits/agent_mail) - Agent mail provides AI agents with dedicated email inboxes for sending, receiving, and managing emails. It empowers agents to communicate autonomously with people, services, and other agents—no human intervention needed.
- [Basecamp](https://composio.dev/toolkits/basecamp) - Basecamp is a project management and team collaboration tool by 37signals. It helps teams organize tasks, share files, and communicate efficiently in one place.
- [Chatwork](https://composio.dev/toolkits/chatwork) - Chatwork is a team communication platform with group chats, file sharing, and task management. It helps businesses boost collaboration and streamline productivity.
- [Clickmeeting](https://composio.dev/toolkits/clickmeeting) - ClickMeeting is a cloud-based platform for running online meetings and webinars. It helps businesses and individuals host, manage, and engage virtual audiences with ease.
- [Confluence](https://composio.dev/toolkits/confluence) - Confluence is Atlassian's team collaboration and knowledge management platform. It helps your team organize, share, and update documents and project content in one secure workspace.
- [Dailybot](https://composio.dev/toolkits/dailybot) - DailyBot streamlines team collaboration with chat-based standups, reminders, and polls. It keeps work flowing smoothly in your favorite messaging platforms.
- [Dialmycalls](https://composio.dev/toolkits/dialmycalls) - Dialmycalls is a mass notification service for sending voice and text messages to contacts. It helps teams and organizations quickly broadcast urgent alerts and updates.
- [Dialpad](https://composio.dev/toolkits/dialpad) - Dialpad is a cloud-based business phone and contact center system for teams. It unifies voice, video, messaging, and meetings across your devices.
- [Discord](https://composio.dev/toolkits/discord) - Discord is a real-time messaging and VoIP platform for communities and teams. It lets users chat, share media, and collaborate across public and private channels.
- [Discordbot](https://composio.dev/toolkits/discordbot) - Discordbot is an automation tool for Discord servers that handles moderation, messaging, and user engagement. It helps communities run smoothly by automating routine and complex tasks.
- [Echtpost](https://composio.dev/toolkits/echtpost) - Echtpost is a secure digital communication platform for encrypted document and message exchange. It ensures confidential data stays private and protected during transmission.
- [Egnyte](https://composio.dev/toolkits/egnyte) - Egnyte is a cloud-based platform for secure file sharing, storage, and governance. It helps teams collaborate efficiently while maintaining data compliance and security.
- [Google Meet](https://composio.dev/toolkits/googlemeet) - Google Meet is a secure video conferencing platform for virtual meetings, chat, and screen sharing. It helps teams connect, collaborate, and communicate seamlessly from anywhere.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Zoho mail MCP?

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

### Can I use Tool Router MCP with Google ADK?

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 Zoho mail tools.

### Can I manage the permissions and scopes for Zoho mail while using Tool Router?

Yes, absolutely. You can configure which Zoho mail 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.

### How safe is my data with Composio Tool Router?

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 Zoho mail data and credentials are handled as safely as possible.

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)