# How to integrate Sender MCP with Google ADK

```json
{
  "title": "How to integrate Sender MCP with Google ADK",
  "toolkit": "Sender",
  "toolkit_slug": "sender",
  "framework": "Google ADK",
  "framework_slug": "google-adk",
  "url": "https://composio.dev/toolkits/sender/framework/google-adk",
  "markdown_url": "https://composio.dev/toolkits/sender/framework/google-adk.md",
  "updated_at": "2026-03-29T06:49:27.339Z"
}
```

## Introduction

This guide walks you through connecting Sender to Google ADK using the Composio tool router. By the end, you'll have a working Sender agent that can create a new email campaign for holiday sale, add a contact to your main subscriber list, get open rates for last week's campaigns through natural language commands.
This guide will help you understand how to give your Google ADK agent real control over a Sender account through Composio's Sender MCP server.
Before we dive in, let's take a quick look at the key ideas and tools involved.

## Also integrate Sender with

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

## TL;DR

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

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

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `SENDER_CREATE_FIELD` | Create Field | Tool to create a new custom subscriber field in Sender.net. Use when you need to add custom fields for email personalization, segmentation, or storing additional subscriber information like company name, birthday, job title, or other custom attributes. |
| `SENDER_CREATE_OR_UPDATE_SUBSCRIBER` | Create Or Update Subscriber | Tool to create a new subscriber or update an existing one in Sender.net. Use when you need to add new subscribers to your email list or update existing subscriber information. This performs an upsert operation - creates if the email doesn't exist, updates if it does. |
| `SENDER_GET_ALL_FIELDS` | Get All Fields | Tool to retrieve a list of all custom subscriber fields configured in the Sender.net account. Use when you need to view available fields for email personalization, segmentation, or managing subscriber data. |
| `SENDER_GET_ALL_WORKFLOWS` | Get All Workflows | Tool to retrieve a list of all automation workflows in the Sender account. Use when you need to view or manage automation workflows. |
| `SENDER_GET_CAMPAIGN_BY_ID` | Get Campaign By ID | Tool to retrieve a specific campaign by its unique ID from Sender. Use when you need detailed information about a campaign including delivery metrics and engagement statistics. |
| `SENDER_GET_GROUP_BY_ID` | Get Group By ID | Tool to retrieve a specific subscriber group by its unique ID from Sender. Use when you need detailed information about a single group including subscriber counts. |
| `SENDER_GET_SUBSCRIBER_BY_EMAIL` | Get Subscriber By Email | Tool to retrieve a specific subscriber by their email address from Sender. Use when you need to fetch detailed information about a single subscriber including their status, groups, and custom fields. |
| `SENDER_GET_SUBSCRIBER_BY_ID` | Get Subscriber By ID | Tool to retrieve a specific subscriber by their unique ID from Sender. Use when you need to fetch detailed information about a single subscriber including their status, groups, and custom fields. |
| `SENDER_UPDATE_SUBSCRIBER_FIELDS` | Update Subscriber Fields | Tool to update custom fields and information for an existing subscriber in Sender.net. Use when you need to modify subscriber details such as email, first name, last name, groups, or custom fields for email personalization and segmentation. |

## Supported Triggers

None listed.

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

The Sender MCP server is an implementation of the Model Context Protocol that connects your AI agent to Sender. It provides structured and secure access so your agent can perform Sender 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 Sender 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=["sender"],
)

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 Sender 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=["sender"],
)

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

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

## Conclusion

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

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

## Related Toolkits

- [Google Sheets](https://composio.dev/toolkits/googlesheets) - 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](https://composio.dev/toolkits/notion) - Notion is a collaborative workspace for notes, docs, wikis, and tasks. It streamlines team knowledge, project tracking, and workflow customization in one place.
- [Airtable](https://composio.dev/toolkits/airtable) - 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.
- [Asana](https://composio.dev/toolkits/asana) - Asana is a collaborative work management platform for teams to organize and track projects. It streamlines teamwork, boosts productivity, and keeps everyone aligned on goals.
- [Google Tasks](https://composio.dev/toolkits/googletasks) - Google Tasks is a to-do list and task management tool integrated into Gmail and Google Calendar. It helps you organize, track, and complete tasks across your Google ecosystem.
- [Linear](https://composio.dev/toolkits/linear) - Linear is a modern issue tracking and project planning tool for fast-moving teams. It helps streamline workflows, organize projects, and boost productivity.
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- [Monday](https://composio.dev/toolkits/monday) - Monday.com is a customizable work management platform for project planning and collaboration. It helps teams organize tasks, automate workflows, and track progress in real time.
- [Reddit](https://composio.dev/toolkits/reddit) - Reddit is a social news platform with thriving user-driven communities (subreddits). It's the go-to place for discussion, content sharing, and viral marketing.
- [Facebook](https://composio.dev/toolkits/facebook) - Facebook is a social media and advertising platform for businesses and creators. It helps you connect, share, and manage content across your public Facebook Pages.
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- [Active campaign](https://composio.dev/toolkits/active_campaign) - ActiveCampaign is a marketing automation and CRM platform for managing email campaigns, sales pipelines, and customer segmentation. It helps businesses engage customers and drive growth through smart automation and targeted outreach.
- [ActiveTrail](https://composio.dev/toolkits/active_trail) - ActiveTrail is a user-friendly email marketing and automation platform. It helps you reach subscribers and automate campaigns with ease.
- [Addressfinder](https://composio.dev/toolkits/addressfinder) - Addressfinder is a data quality platform for verifying addresses, emails, and phone numbers. It helps you ensure accurate customer and contact data every time.
- [Agiled](https://composio.dev/toolkits/agiled) - Agiled is an all-in-one business management platform for CRM, projects, and finance. It helps you streamline workflows, consolidate client data, and manage business processes in one place.
- [Ahrefs](https://composio.dev/toolkits/ahrefs) - Ahrefs is an SEO and marketing platform for site audits, keyword research, and competitor insights. It helps you improve search rankings and drive organic traffic.
- [Amcards](https://composio.dev/toolkits/amcards) - AMCards lets you create and mail personalized greeting cards online. Build stronger customer relationships with easy, automated card campaigns.
- [Ascora](https://composio.dev/toolkits/ascora) - Ascora is a cloud-based field service management platform for service businesses. It streamlines scheduling, invoicing, and customer operations in one place.
- [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.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Sender MCP?

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

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

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

---
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