# How to integrate Omnisend MCP with Google ADK

```json
{
  "title": "How to integrate Omnisend MCP with Google ADK",
  "toolkit": "Omnisend",
  "toolkit_slug": "omnisend",
  "framework": "Google ADK",
  "framework_slug": "google-adk",
  "url": "https://composio.dev/toolkits/omnisend/framework/google-adk",
  "markdown_url": "https://composio.dev/toolkits/omnisend/framework/google-adk.md",
  "updated_at": "2026-05-12T10:20:31.368Z"
}
```

## Introduction

This guide walks you through connecting Omnisend to Google ADK using the Composio tool router. By the end, you'll have a working Omnisend agent that can add new subscribers from latest signups, update contact email preferences in bulk, list all products for upcoming campaign through natural language commands.
This guide will help you understand how to give your Google ADK agent real control over a Omnisend account through Composio's Omnisend MCP server.
Before we dive in, let's take a quick look at the key ideas and tools involved.

## Also integrate Omnisend with

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

## TL;DR

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

The Omnisend MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Omnisend account. It provides structured and secure access to your ecommerce marketing data, so your agent can manage contacts, automate batch operations, update products, and streamline campaign preparation for your store.
- Bulk contact and product management: Effortlessly create or update large sets of contacts or products in one go, perfect for onboarding new subscribers or syncing your catalog.
- Individual contact handling: Retrieve, update, or enrich detailed contact profiles, making it easy for your agent to personalize outreach or manage subscriptions.
- Batch job automation and tracking: Initiate batch operations and monitor their progress, status, and results to ensure smooth processing of large datasets.
- Product catalog maintenance: List, review, or delete products directly from your Omnisend account, keeping your store's offerings up to date for campaigns.
- Contact segmentation and filtering: Fetch paginated and filtered contact lists, enabling targeted marketing actions and smarter audience management.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `OMNISEND_ADD_CART_PRODUCT` | Add Cart Product | Tool to add a product to a cart in Omnisend (v3 API). Use when updating cart contents or tracking abandoned carts. |
| `OMNISEND_CREATE_BATCH` | Create Batch | Tool to create a new batch operation for multiple items. Use when you need to process many records asynchronously in one call, e.g., bulk contacts, products, orders, or events. Use after preparing the items list to avoid rate limits. |
| `OMNISEND_CREATE_CART` | Create Cart | Tool to create a new shopping cart in Omnisend. Use when tracking customer cart activity for abandoned cart campaigns. |
| `OMNISEND_CREATE_CATEGORY` | Create Category | Tool to create a new category in Omnisend. Use when organizing products into categories. |
| `OMNISEND_CREATE_ORDER` | Create Order | Tool to create a new order in Omnisend v3 API. Use when recording a customer purchase or order transaction. |
| `OMNISEND_CREATE_OR_UPDATE_CONTACT` | Create or Update Contact | Tool to create or update a contact in Omnisend. Use after collecting subscriber details. |
| `OMNISEND_CREATE_PRODUCT` | Create Product | Tool to create a new product in the Omnisend product catalog. Use when adding products for email campaigns or syncing inventory. |
| `OMNISEND_CREATE_PRODUCT_CATEGORY` | Create Product Category | Tool to create a new product category in the Omnisend catalog. Use when organizing products into categories. |
| `OMNISEND_DELETE_CART` | Delete Cart | Tool to delete a cart from Omnisend by its ID (v3 API). Use when you need to remove an abandoned or expired cart from the system. |
| `OMNISEND_DELETE_CATEGORY` | Delete Category | Tool to remove a category from Omnisend by its ID. Use when you need to delete a category and ensure it is no longer available in your catalog. |
| `OMNISEND_DELETE_ORDER` | Delete Order | Tool to delete an order from Omnisend by its ID. Use when you need to remove an order from the system. |
| `OMNISEND_DELETE_PRODUCT` | Delete Product | Tool to remove a product from Omnisend by its ID. Use when you need to delete a product and ensure it is no longer available in your catalog. |
| `OMNISEND_DELETE_PRODUCT_CATEGORY` | Delete Product Category | Tool to remove a product category from Omnisend by its ID. Use when you need to delete a product category from your catalog. |
| `OMNISEND_GET_BATCHES` | Get Batches | Tool to retrieve a list of batch operations. Use after initiating a batch job to monitor its progress and results. |
| `OMNISEND_GET_BATCH_INFORMATION` | Get Batch Information | Tool to retrieve information about a specific batch by ID. Use after submitting a batch when you need a detailed status and counts. |
| `OMNISEND_GET_BATCH_ITEM` | Get Batch Item | Tool to retrieve a specific item within a batch by batchID and itemID. Use when you need to inspect the result of a single batch operation. |
| `OMNISEND_GET_BATCH_ITEMS` | Get Batch Items | Tool to retrieve processed items of a specific batch by ID. Use when you need to inspect individual results of a batch operation after fetching batch details. |
| `OMNISEND_GET_BRAND` | Get Brand | Tool to retrieve information about the current authenticated brand. Use when you need brand details like currency, platform, or website. |
| `OMNISEND_GET_CART` | Get Cart | Tool to retrieve a specific cart by ID from Omnisend v3 API. Use when you need detailed cart information including products and customer contact details. |
| `OMNISEND_GET_CATEGORY` | Get Category | Tool to retrieve details of a specific category by ID. Use when you need to fetch information about a category. |
| `OMNISEND_GET_CONTACT` | Get Contact | Tool to retrieve details of a single contact by ID. Use when you already have a contactId and need the full profile. |
| `OMNISEND_GET_ORDER` | Get Order | Tool to retrieve details of a specific order by ID. Use when you need order information including products, addresses, and payment details. |
| `OMNISEND_GET_PRODUCT` | Get Product | Tool to retrieve details of a specific product by ID from Omnisend. Use when you need full product information including variants, pricing, and stock status. |
| `OMNISEND_GET_PRODUCT_CATEGORY` | Get Product Category | Tool to retrieve a specific product category by ID. Use when you need details about a particular product category. |
| `OMNISEND_LIST_CAMPAIGNS` | List Campaigns | Tool to retrieve a paginated list of campaigns with optional filtering by status and type. Use when you need to view or analyze campaign performance across multiple campaigns. |
| `OMNISEND_LIST_CARTS` | List Carts | Tool to retrieve a paginated list of carts with optional filtering. Use when you need to fetch carts by date range, contact, or segment. |
| `OMNISEND_LIST_CATEGORIES` | List Categories | Tool to retrieve a paginated list of product categories. Use when you need category IDs for product management or catalog organization. |
| `OMNISEND_LIST_CONTACTS` | List Contacts | Tool to retrieve a paginated list of contacts with optional filtering. Use when you need to fetch contacts in batches and handle cursor pagination. |
| `OMNISEND_LIST_EVENTS` | List Events | Tool to retrieve all custom events created in Omnisend app. Use when you need to view available event types for automation workflows or event tracking. |
| `OMNISEND_LIST_PRODUCT_CATEGORIES` | List Product Categories | Tool to retrieve a paginated list of product categories from the Omnisend catalog. Use when fetching category data for product organization. |
| `OMNISEND_LIST_PRODUCTS` | List Products | Tool to retrieve a paginated list of products. Use when syncing product catalog before campaign creation. |
| `OMNISEND_REMOVE_CART_PRODUCT` | Remove Cart Product | Tool to remove a product from a cart in Omnisend. Use when you need to delete a specific product from a cart. |
| `OMNISEND_REPLACE_CART` | Replace Cart | Tool to replace an existing cart in Omnisend using the v3 API. Use when you need to completely replace all cart data including products, pricing, and recovery URL. |
| `OMNISEND_REPLACE_CART_PRODUCT` | Replace Cart Product | Tool to replace a product in a cart using Omnisend v3 API. Use when you need to update all details of a specific product in a cart. |
| `OMNISEND_REPLACE_CATEGORY` | Replace Category | Tool to replace a category's title by ID. Use when you need to update an entire category resource. |
| `OMNISEND_REPLACE_ORDER` | Replace Order | Tool to completely replace an existing order in Omnisend. Use when you need to update all order details at once, replacing the entire order record. |
| `OMNISEND_REPLACE_PRODUCT` | Replace Product | Tool to replace an existing product in the Omnisend catalog. Use when you need to completely replace all product data with new information. |
| `OMNISEND_SEND_EVENT` | Send Event | Tool to send a customer event to Omnisend. Events can trigger automations and track customer behavior. Use when you need to record customer interactions such as product views, cart actions, or custom events. |
| `OMNISEND_UPDATE_CART` | Update Cart | Tool to partially update a cart in Omnisend (v3 API). Use when you need to modify cart details such as currency, total amount, recovery URL, or products. |
| `OMNISEND_UPDATE_CART_PRODUCT` | Update Cart Product | Tool to update a product in a cart (v3 API). Use when you need to modify product details such as quantity, price, or other attributes for an existing cart item. |
| `OMNISEND_UPDATE_CONTACT` | Update Contact | Tool to update fields of an existing contact by ID. Use after retrieving contact ID. PATCH https://api.omnisend.com/v3/contacts/{contactId} Example: UpdateContact(contactId="..., body={firstName: 'John'}) |
| `OMNISEND_UPDATE_ORDER_STATUS` | Update Order Status | Tool to partially update an order status in Omnisend (v3 API). Use when you need to update shipping details, payment status, or fulfillment status of an existing order. |
| `OMNISEND_UPDATE_PRODUCT_CATEGORY` | Update Product Category | Tool to update an existing product category title in Omnisend. Use when you need to modify a category's name. |

## Supported Triggers

None listed.

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

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

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 Omnisend 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=["omnisend"],
)

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

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

## Conclusion

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

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

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- [Brandfetch](https://composio.dev/toolkits/brandfetch) - Brandfetch is an API that delivers company logos, colors, and visual branding assets. It helps marketers and developers keep brand visuals consistent everywhere.
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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.
- [Demio](https://composio.dev/toolkits/demio) - Demio is webinar software built for marketers, offering both live and automated sessions with interactive features. It helps teams engage audiences and optimize lead generation through detailed analytics.

## Frequently Asked Questions

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

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

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

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

---
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