# How to integrate Sendfox MCP with Google ADK

```json
{
  "title": "How to integrate Sendfox MCP with Google ADK",
  "toolkit": "Sendfox",
  "toolkit_slug": "sendfox",
  "framework": "Google ADK",
  "framework_slug": "google-adk",
  "url": "https://composio.dev/toolkits/sendfox/framework/google-adk",
  "markdown_url": "https://composio.dev/toolkits/sendfox/framework/google-adk.md",
  "updated_at": "2026-05-12T10:25:16.583Z"
}
```

## Introduction

This guide walks you through connecting Sendfox to Google ADK using the Composio tool router. By the end, you'll have a working Sendfox agent that can list all active campaigns this week, unsubscribe a contact by email address, retrieve all contacts from your main list through natural language commands.
This guide will help you understand how to give your Google ADK agent real control over a Sendfox account through Composio's Sendfox MCP server.
Before we dive in, let's take a quick look at the key ideas and tools involved.

## Also integrate Sendfox with

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

## TL;DR

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

The Sendfox MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Sendfox account. It provides structured and secure access to your contact lists, campaigns, automations, and more, so your agent can fetch contacts, manage lists, retrieve campaign data, and automate subscriber actions on your behalf.
- Contact management and lookup: Instantly retrieve contact details by email or ID, fetch all contacts, or discover specific fields to personalize your outreach.
- List organization and updates: Ask your agent to fetch all your Sendfox lists, get details for a specific list, or remove contacts from lists as needed.
- Campaign and automation insights: Effortlessly retrieve paginated lists of campaigns or automations, so you can stay on top of your email marketing performance.
- Subscription and unsubscribe actions: Let your agent globally unsubscribe a contact or handle opt-outs automatically for better list hygiene.
- Discover contact field metadata: Pull all available contact fields to help with dynamic contact creation or targeted updates.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `SENDFOX_DELETE_CONTACT_FROM_LIST` | Delete Contact from List | Tool to remove a contact from a specific list in SendFox. Use when you need to disassociate a contact from a list without deleting the contact entirely. The contact will remain in your account but will no longer be a member of the specified list. |
| `SENDFOX_GET_AUTOMATIONS` | Get Automations | Tool to retrieve a list of automations. Use when you need to list all automations for your SendFox account. |
| `SENDFOX_GET_CAMPAIGN_BY_ID` | Get Campaign by ID | Retrieve details for a specific campaign by its ID from SendFox. Use this when you need to fetch information about a particular campaign. Returns campaign details including title, subject, HTML content, sender info, and scheduling details. |
| `SENDFOX_GET_CAMPAIGNS` | Get Campaigns | Retrieve a paginated list of email campaigns from SendFox. Use this to fetch all campaigns or navigate through pages of results. Returns campaign details including status, subject, content, and timestamps. |
| `SENDFOX_GET_CONTACT_BY_ID` | Get Contact by ID | Retrieves a contact's details by their unique ID from SendFox. Use this tool when you need to look up a specific contact's information after obtaining their ID from a contact list or other API response. Returns contact details including email, name, subscription status, and list memberships. |
| `SENDFOX_GET_CONTACT_FIELDS` | Get Contact Fields | Retrieves all contact fields available in the SendFox account. Use this to discover available fields before creating or updating contacts. Returns standard fields (email, first_name, last_name) and any custom fields configured in the account. |
| `SENDFOX_GET_CONTACTS` | Get Contacts | Tool to retrieve a paginated list of contacts. Use when you need to fetch contacts in pages, optionally filtering by email. |
| `SENDFOX_GET_CONTACTS_IN_LIST` | Get Contacts in List | Tool to retrieve contacts in a specific list. Use when you need to fetch all contacts belonging to a particular list, optionally filtering by search query. |
| `SENDFOX_GET_CURRENT_USER` | Get Current User | Tool to retrieve information about the authenticated user from SendFox. Returns user details including name, email, contact count, and contact limit. Use this tool when you need to check account information or verify authentication status. |
| `SENDFOX_GET_FORMS` | Get Forms | Tool to retrieve a paginated list of forms from SendFox. Use when you need to fetch all forms or search for specific forms by query. |
| `SENDFOX_GET_LIST_BY_ID` | Get List by ID | Retrieves details of a specific contact list by its ID from SendFox. Use this tool when you need information about a particular list (name, contact count, timestamps). Requires a valid list_id which can be obtained from the 'Get Lists' action. |
| `SENDFOX_GET_LISTS` | Get Lists | Retrieve all contact lists from your SendFox account with pagination support. Use this tool when you need to: - Fetch all available contact lists for your account - Get list IDs to use with other SendFox actions (e.g., adding contacts to lists) - Check list names and browse through paginated results Returns a list of contact lists with their IDs and names, along with pagination metadata. |
| `SENDFOX_LIST_CONTACT_FIELDS` | List Contact Fields | Tool to list all custom contact fields defined by the user. Returns a paginated list of contact fields with their IDs, names, and timestamps. |
| `SENDFOX_LIST_UNSUBSCRIBED_CONTACTS` | List Unsubscribed Contacts | Tool to retrieve a paginated list of contacts who have unsubscribed. Use when you need to fetch unsubscribed contacts, optionally filtering by search query. |
| `SENDFOX_PATCH_UNSUBSCRIBE_CONTACT` | Unsubscribe Contact | Unsubscribe a contact from all email communications in your SendFox account. Use this tool when you need to: - Globally unsubscribe a contact from all future emails - Honor unsubscribe requests from subscribers - Mark a contact as opted-out The contact will be marked as unsubscribed but remains in your contacts database. This is a permanent action - the contact will not receive any future campaigns. |
| `SENDFOX_POST_CREATE_CONTACT` | Create Contact | Create a new contact (subscriber) in your SendFox account. Use this tool when you need to: - Add a new subscriber to your email list - Create a contact with optional first/last name - Add a contact to one or more specific lists If the contact already exists, their information will be updated with the provided data. |
| `SENDFOX_POST_CREATE_LIST` | Create List | Create a new contact list in your SendFox account. Use this tool when you need to: - Create a new mailing list for organizing contacts - Set up a list before adding subscribers to it - Segment your audience by creating topic-specific lists The list will be created with 0 contacts initially. After creation, use other SendFox actions to add contacts to this list. Returns the created list's ID, name, and metadata. |

## Supported Triggers

None listed.

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

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

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 Sendfox 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=["sendfox"],
)

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

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

## Conclusion

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

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

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- [Campayn](https://composio.dev/toolkits/campayn) - Campayn is an email marketing platform for creating, sending, and managing campaigns. It helps businesses engage contacts and grow audiences with easy-to-use tools.
- [Cardly](https://composio.dev/toolkits/cardly) - Cardly is a platform for creating and sending personalized direct mail to customers. It helps businesses break through the digital clutter by getting real engagement via physical mailboxes.
- [ClickSend](https://composio.dev/toolkits/clicksend) - ClickSend is a cloud-based SMS and email marketing platform for businesses. It streamlines communication by enabling quick message delivery and contact management.
- [Crustdata](https://composio.dev/toolkits/crustdata) - CrustData is an AI-powered data intelligence platform for real-time company and people data. It helps B2B sales teams, AI SDRs, and investors react to live business signals.
- [Curated](https://composio.dev/toolkits/curated) - Curated is a platform for collecting, curating, and publishing newsletters. It streamlines content aggregation and distribution for creators and teams.
- [Customerio](https://composio.dev/toolkits/customerio) - Customer.io is a customer engagement platform for targeted messaging across email, SMS, and push. Easily automate, segment, and track communications with your audience.
- [Cutt ly](https://composio.dev/toolkits/cutt_ly) - Cutt.ly is a URL shortening service for managing and analyzing links. Streamline your workflows with quick, trackable, and branded short URLs.
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## Frequently Asked Questions

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

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

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

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

---
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