How to integrate Esputnik MCP with Google ADK

This guide walks you through connecting Esputnik to Google ADK using the Composio tool router. By the end, you'll have a working Esputnik agent that can bulk add 500 new email contacts, delete sms message template with id 123, get status of yesterday's contact import through natural language commands. This guide will help you understand how to give your Google ADK agent real control over a Esputnik account through Composio's Esputnik MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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Esputnik

Api Key

eSputnik is a marketing automation platform for managing emails, SMS, and push notifications. It helps businesses streamline customer communications across multiple channels.

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Introduction

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

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

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

The Esputnik MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Esputnik account. It provides structured and secure access to your marketing automation tools, so your agent can perform actions like sending broadcasts, managing contacts, importing data, and handling push notifications on your behalf.

Bulk contact import and management: Quickly add or update thousands of contacts at once, check import status, and keep your lists up to date with minimal effort.
Broadcast and message control: Retrieve, review, and manage your marketing broadcasts and app inbox messages, ensuring your campaigns run smoothly.
Order and transactional data automation: Import and synchronize large batches of order data, keeping your marketing segmentation and triggers accurate and relevant.
Push and SMS notification management: Activate or deactivate push tokens, delete outdated SMS templates, and fine-tune your notification workflows directly through your agent.
Domain and integration setup: Register domains for web tracking or widgets, helping you expand and customize your communication reach seamlessly.

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 Esputnik 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=["esputnik"],
)

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 Esputnik 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 Esputnik 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=["esputnik"],
)

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

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

Conclusion

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

Key takeaways:

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

Add Contact

Tool to create or update a single contact in eSputnik in real-time.

Add Domain

Add Orders Bulk

Tool to transfer orders in bulk to eSputnik.

Add Unsubscribed Emails

Tool to add email addresses to the list of unsubscribed contacts.

Add Web Push Domain

Tool to add a domain for web push notifications in eSputnik.

Attach Contacts to Segment

Tool to attach contacts to a static segment (group) by contact IDs or external customer IDs.

Bulk Add or Update Contacts

Bulk add or update up to 3000 contacts in eSputnik asynchronously.

Change Mobile Push Token Activity

Activate or deactivate a mobile push notification token in eSputnik.

Create API Token

Generate a new API token for authentication.

Create App Inbox Message

Tool to create a basic App Inbox message in eSputnik.

Create Contacts from File

Import or update contacts from an external file in eSputnik.

Create Email Message

Tool to create or update an email message in eSputnik.

Create Mobile Push Message

Tool to create a new mobile push notification message in eSputnik.

Create SMS Message

Tool to create a basic SMS message template in eSputnik.

Create Telegram Message

Create a basic Telegram bot message in eSputnik.

Delete App Inbox Message

Tool to delete an App Inbox message by its ID from eSputnik.

Delete App Inbox Translation

Delete a language translation of an App Inbox message from eSputnik.

Delete Broadcast

Tool to cancel a scheduled broadcast campaign.

Delete Contact

Tool to delete a contact by its Yespo ID.

Delete Contact by External ID

Delete a contact from eSputnik using their external customer ID.

Delete Email Message

Delete a basic email message by its ID from eSputnik.

Delete Email Translation

Delete a translation of a base email message from eSputnik.

Delete Mobile Push Message

Delete a base Mobile Push message by its ID from eSputnik.

Delete Mobile Push Translation

Delete a language version of a base Mobile Push message from eSputnik.

Delete Orders

Tool to schedule asynchronous deletion of orders in eSputnik.

Delete SMS Message

Delete a base SMS message template by its ID from eSputnik.

Delete SMS Translation

Delete a language version of a base SMS message from eSputnik.

Delete Telegram Message

Delete a base Telegram bot message by its ID from eSputnik.

Delete Telegram Translation

Delete a language version of a Telegram bot message from eSputnik.

Detach Contacts from Segment

Tool to delete contacts from a static segment by contact IDs or external customer IDs.

Generate Event V2

Tool to send backend events from websites and mobile apps to eSputnik.

Generate Event V3

Tool to generate events in eSputnik v3 API.

Generate Past Events V2

Tool to transfer past event data from your CRM or data store to eSputnik using v2 API.

Generate Past Events V3

Tool to generate past events in eSputnik v3 API.

Get Account Info

Retrieve basic eSputnik account information.

Get App Inbox Message

Retrieves an App Inbox message by its unique identifier from eSputnik.

Get Broadcasts

Retrieve a paginated list of broadcast campaigns from eSputnik.

Get Contact

Retrieve complete information about a contact by their ID.

Get Contact Emails

Tool to retrieve email addresses of contacts by their contact IDs.

Get Contact Import Status

Retrieve the status of a contact import session in eSputnik.

Get Contact Message History

Retrieve a contact's message history across multiple channels from eSputnik.

Get Contacts

Search for contacts in eSputnik using various filter criteria.

Get Contact Subscriptions

Retrieve all subscription categories a contact is enrolled in.

Get Email Interfaces

Tool to retrieve all configured email interfaces (sender names) from eSputnik.

Get Email Message

Retrieves an email message by its unique identifier from eSputnik.

Get Email View Link

Get a link to view an email message in browser from eSputnik.

Get Message Status

Retrieve delivery status for sent messages across all channels (email, SMS, Viber, push).

Get Mobile Push Message

Retrieves a mobile push message by its unique identifier from eSputnik.

Get Organization Balance

Retrieve the current eSputnik organization balance.

Get Organization Billing History

Retrieve the organization's billing history from eSputnik, broken down by day and media channel.

Get Preprocessor File Status

Retrieve the status of a preprocessor file upload session.

Get Product Feeds Configuration

Tool to retrieve product feeds configuration from eSputnik.

Get Promocodes Count

Get the number of available promotional codes in eSputnik.

Get Site Domain

Retrieve the organization's domain configuration from eSputnik.

Get Site Tracking Script

Retrieve the site tracking script for your eSputnik account.

Get SMS Interfaces

Retrieve all SMS interfaces (alpha names) configured for the organization.

Get Subscription Categories

Retrieve all subscription categories for the organization.

Get Telegram Message

Retrieve a Telegram bot message by its unique identifier from eSputnik.

List Promotional Codes

Retrieve a list of promotional codes from eSputnik.

List Web Push Domains

Retrieve the list of domains registered for web push notifications.

Remove From Unsubscribed

Tool to remove email addresses from the unsubscribed contacts list in eSputnik.

Search App Inbox Messages

Search for mobile App Inbox messages using a part of the name or a tag.

Search Contacts

Search for all contacts in a segment (group).

Search Email Messages

Search for email messages using a part of their name or a tag.

Search Mobile Push Messages

Search for mobile push messages using part of the name or a tag.

Search Segments

Search for and retrieve available segments (groups) in eSputnik.

Search SMS Messages

Search for SMS messages using part of their names or tags in eSputnik.

Search Telegram Messages

Search for Telegram bot messages using a part of name or a tag.

Search Viber Messages

Search for Viber messages using part of the name or a tag.

Search Workflows

Search for and retrieve available workflows from eSputnik.

Send Email

Send an email message to one or more contacts via eSputnik API.

Send Prepared Message

Tool to send a prepared message to one or many contacts.

Subscribe Contact

Tool to subscribe a contact for double opt-in implementation.

Update App Inbox Message

Tool to update the base App Inbox message in eSputnik.

Update App Inbox Translation

Tool to update or add a language version for an App Inbox message in eSputnik.

Update Contact

Tool to update contact information by contact ID.

Update Contact Subscriptions

Tool to update the subscription categories a contact is enrolled in.

Update Email Message

Tool to update an existing email message in eSputnik.

Update Email Translation

Tool to update or add a language version for a base email message in eSputnik.

Update Interaction Status

Tool to update the status of a message interaction using interaction_id.

Update Mobile Push Message

Tool to update an existing mobile push notification message in eSputnik.

Update Mobile Push Translation

Tool to update or add a language version for a mobile push message in eSputnik.

Update Preprocessor File By ID

Tool to update a preprocessor file's data by providing a new external link.

Update SMS Message

Tool to update an existing base SMS message template in eSputnik.

Update SMS Translation

Tool to update a language version of an SMS message in eSputnik.

Update Telegram Message

Update a base Telegram bot message in eSputnik.

Update Telegram Translation

Update a translated telegram bot message in eSputnik.

Upload Preprocessor File

Tool to upload a file for the preprocessor from an external repository.

Upload Promotional Codes

Tool to upload promotional codes to eSputnik in bulk.

FRAMEWORKS

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OpenAI Agents SDK

Use Esputnik MCP with OpenAI Agents SDK

Claude Agent SDK

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Claude Code

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Claude Cowork

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Codex

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OpenClaw

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Hermes

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CLI

Use Esputnik MCP with CLI

LangChain

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Vercel AI SDK

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Mastra AI

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LlamaIndex

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CrewAI

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FAQ

Frequently asked questions

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

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

Start with Esputnik.It takes 30 seconds.

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

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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 Esputnik MCP with Google ADK

Connect Esputnik without auth hassles

Introduction

Also integrate Esputnik with

TL;DR

What is Google ADK?

What is the Esputnik 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 Esputnik 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

Reddit

Facebook

Linkedin

Active campaign

Frequently asked questions

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

Can I use Tool Router MCP with Google ADK?+

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

How safe is my data with Composio Tool Router?+

Start with Esputnik.It takes 30 seconds.

Teams ship real agents on Composio