How to integrate Esputnik MCP with Claude Agent SDK

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Introduction

This guide walks you through connecting Esputnik to the Claude Agent SDK 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 Claude Agent SDK 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

TL;DR

Here's what you'll learn:
  • Get and set up your Claude/Anthropic and Composio API keys
  • Install the necessary dependencies
  • Initialize Composio and create a Tool Router session for Esputnik
  • Configure an AI agent that can use Esputnik as a tool
  • Run a live chat session where you can ask the agent to perform Esputnik operations

What is Claude Agent SDK?

The Claude Agent SDK is Anthropic's official framework for building AI agents powered by Claude. It provides a streamlined interface for creating agents with MCP tool support and conversation management.

Key features include:

  • Native MCP Support: Built-in support for Model Context Protocol servers
  • Permission Modes: Control tool execution permissions
  • Streaming Responses: Real-time response streaming for interactive applications
  • Context Manager: Clean async context management for sessions

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.

Supported Tools & Triggers

Tools
Add ContactTool to create or update a single contact in eSputnik in real-time.
Add DomainRegister a domain with eSputnik for web tracking, widgets, or web push notifications.
Add Orders BulkTool to transfer orders in bulk to eSputnik.
Add Unsubscribed EmailsTool to add email addresses to the list of unsubscribed contacts.
Add Web Push DomainTool to add a domain for web push notifications in eSputnik.
Attach Contacts to SegmentTool to attach contacts to a static segment (group) by contact IDs or external customer IDs.
Bulk Add or Update ContactsBulk add or update up to 3000 contacts in eSputnik asynchronously.
Change Mobile Push Token ActivityActivate or deactivate a mobile push notification token in eSputnik.
Create API TokenGenerate a new API token for authentication.
Create App Inbox MessageTool to create a basic App Inbox message in eSputnik.
Create Contacts from FileImport or update contacts from an external file in eSputnik.
Create Email MessageTool to create or update an email message in eSputnik.
Create Mobile Push MessageTool to create a new mobile push notification message in eSputnik.
Create SMS MessageTool to create a basic SMS message template in eSputnik.
Create Telegram MessageCreate a basic Telegram bot message in eSputnik.
Delete App Inbox MessageTool to delete an App Inbox message by its ID from eSputnik.
Delete App Inbox TranslationDelete a language translation of an App Inbox message from eSputnik.
Delete BroadcastTool to cancel a scheduled broadcast campaign.
Delete ContactTool to delete a contact by its Yespo ID.
Delete Contact by External IDDelete a contact from eSputnik using their external customer ID.
Delete Email MessageDelete a basic email message by its ID from eSputnik.
Delete Email TranslationDelete a translation of a base email message from eSputnik.
Delete Mobile Push MessageDelete a base Mobile Push message by its ID from eSputnik.
Delete Mobile Push TranslationDelete a language version of a base Mobile Push message from eSputnik.
Delete OrdersTool to schedule asynchronous deletion of orders in eSputnik.
Delete SMS MessageDelete a base SMS message template by its ID from eSputnik.
Delete SMS TranslationDelete a language version of a base SMS message from eSputnik.
Delete Telegram MessageDelete a base Telegram bot message by its ID from eSputnik.
Delete Telegram TranslationDelete a language version of a Telegram bot message from eSputnik.
Detach Contacts from SegmentTool to delete contacts from a static segment by contact IDs or external customer IDs.
Generate Event V2Tool to send backend events from websites and mobile apps to eSputnik.
Generate Event V3Tool to generate events in eSputnik v3 API.
Generate Past Events V2Tool to transfer past event data from your CRM or data store to eSputnik using v2 API.
Generate Past Events V3Tool to generate past events in eSputnik v3 API.
Get Account InfoRetrieve basic eSputnik account information.
Get App Inbox MessageRetrieves an App Inbox message by its unique identifier from eSputnik.
Get BroadcastsRetrieve a paginated list of broadcast campaigns from eSputnik.
Get ContactRetrieve complete information about a contact by their ID.
Get Contact EmailsTool to retrieve email addresses of contacts by their contact IDs.
Get Contact Import StatusRetrieve the status of a contact import session in eSputnik.
Get Contact Message HistoryRetrieve a contact's message history across multiple channels from eSputnik.
Get ContactsSearch for contacts in eSputnik using various filter criteria.
Get Contact SubscriptionsRetrieve all subscription categories a contact is enrolled in.
Get Email InterfacesTool to retrieve all configured email interfaces (sender names) from eSputnik.
Get Email MessageRetrieves an email message by its unique identifier from eSputnik.
Get Email View LinkGet a link to view an email message in browser from eSputnik.
Get Message StatusRetrieve delivery status for sent messages across all channels (email, SMS, Viber, push).
Get Mobile Push MessageRetrieves a mobile push message by its unique identifier from eSputnik.
Get Organization BalanceRetrieve the current eSputnik organization balance.
Get Organization Billing HistoryRetrieve the organization's billing history from eSputnik, broken down by day and media channel.
Get Preprocessor File StatusRetrieve the status of a preprocessor file upload session.
Get Product Feeds ConfigurationTool to retrieve product feeds configuration from eSputnik.
Get Promocodes CountGet the number of available promotional codes in eSputnik.
Get Site DomainRetrieve the organization's domain configuration from eSputnik.
Get Site Tracking ScriptRetrieve the site tracking script for your eSputnik account.
Get SMS InterfacesRetrieve all SMS interfaces (alpha names) configured for the organization.
Get Subscription CategoriesRetrieve all subscription categories for the organization.
Get Telegram MessageRetrieve a Telegram bot message by its unique identifier from eSputnik.
List Promotional CodesRetrieve a list of promotional codes from eSputnik.
List Web Push DomainsRetrieve the list of domains registered for web push notifications.
Remove From UnsubscribedTool to remove email addresses from the unsubscribed contacts list in eSputnik.
Search App Inbox MessagesSearch for mobile App Inbox messages using a part of the name or a tag.
Search ContactsSearch for all contacts in a segment (group).
Search Email MessagesSearch for email messages using a part of their name or a tag.
Search Mobile Push MessagesSearch for mobile push messages using part of the name or a tag.
Search SegmentsSearch for and retrieve available segments (groups) in eSputnik.
Search SMS MessagesSearch for SMS messages using part of their names or tags in eSputnik.
Search Telegram MessagesSearch for Telegram bot messages using a part of name or a tag.
Search Viber MessagesSearch for Viber messages using part of the name or a tag.
Search WorkflowsSearch for and retrieve available workflows from eSputnik.
Send EmailSend an email message to one or more contacts via eSputnik API.
Send Prepared MessageTool to send a prepared message to one or many contacts.
Subscribe ContactTool to subscribe a contact for double opt-in implementation.
Update App Inbox MessageTool to update the base App Inbox message in eSputnik.
Update App Inbox TranslationTool to update or add a language version for an App Inbox message in eSputnik.
Update ContactTool to update contact information by contact ID.
Update Contact SubscriptionsTool to update the subscription categories a contact is enrolled in.
Update Email MessageTool to update an existing email message in eSputnik.
Update Email TranslationTool to update or add a language version for a base email message in eSputnik.
Update Interaction StatusTool to update the status of a message interaction using interaction_id.
Update Mobile Push MessageTool to update an existing mobile push notification message in eSputnik.
Update Mobile Push TranslationTool to update or add a language version for a mobile push message in eSputnik.
Update Preprocessor File By IDTool to update a preprocessor file's data by providing a new external link.
Update SMS MessageTool to update an existing base SMS message template in eSputnik.
Update SMS TranslationTool to update a language version of an SMS message in eSputnik.
Update Telegram MessageUpdate a base Telegram bot message in eSputnik.
Update Telegram TranslationUpdate a translated telegram bot message in eSputnik.
Upload Preprocessor FileTool to upload a file for the preprocessor from an external repository.
Upload Promotional CodesTool to upload promotional codes to eSputnik in bulk.

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:

  1. Discovery: Searches for tools matching your task and returns relevant toolkits with their details.
  2. Authentication: Checks for active connections. If missing, creates an auth config and returns a connection URL via Auth Link.
  3. Execution: Executes the action using the authenticated connection.

Step-by-step Guide

Prerequisites

Before starting, make sure you have:
  • Composio API Key and Claude/Anthropic API Key
  • Primary know-how of Claude Agents SDK
  • A Esputnik account
  • Some knowledge of Python

Getting API Keys for Claude/Anthropic and Composio

Claude/Anthropic API Key
  • Go to the Anthropic Console and create an API key. You'll need credits to use the models.
  • Keep the API key safe.
Composio API Key
  • Log in to the Composio dashboard.
  • Navigate to your API settings and generate a new API key.
  • Store this key securely as you'll need it for authentication.

Install dependencies

pip install composio-anthropic claude-agent-sdk python-dotenv

Install the Composio SDK and the Claude Agents SDK.

What's happening:

  • composio-anthropic provides Composio integration for Anthropic
  • claude-agent-sdk is the core agent framework
  • python-dotenv loads environment variables

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here
ANTHROPIC_API_KEY=your_anthropic_api_key_here

Create a .env file in your project root.

What's happening:

  • COMPOSIO_API_KEY authenticates with Composio
  • USER_ID identifies the user for session management
  • ANTHROPIC_API_KEY authenticates with Anthropic/Claude

Import dependencies

import asyncio
from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions
import os
from composio import Composio
from dotenv import load_dotenv

load_dotenv()
What's happening:
  • We're importing all necessary libraries including the Claude Agent SDK and Composio
  • The load_dotenv() function loads environment variables from your .env file
  • This setup prepares the foundation for connecting Claude with Esputnik functionality

Create a Composio instance and Tool Router session

async def chat_with_remote_mcp():
    api_key = os.getenv("COMPOSIO_API_KEY")
    if not api_key:
        raise RuntimeError("COMPOSIO_API_KEY is not set")

    composio = Composio(api_key=api_key)

    # Create Tool Router session for Esputnik
    mcp_server = composio.create(
        user_id=os.getenv("USER_ID"),
        toolkits=["esputnik"]
    )

    url = mcp_server.mcp.url

    if not url:
        raise ValueError("Session URL not found")
What's happening:
  • The function checks for the required COMPOSIO_API_KEY environment variable
  • We're creating a Composio instance using our API key
  • The create method creates a Tool Router session for Esputnik
  • The returned url is the MCP server URL that your agent will use

Configure Claude Agent with MCP

# Configure remote MCP server for Claude
options = ClaudeAgentOptions(
    permission_mode="bypassPermissions",
    mcp_servers={
        "composio": {
            "type": "http",
            "url": url,
            "headers": {
                "x-api-key": os.getenv("COMPOSIO_API_KEY")
            }
        }
    },
    system_prompt="You are a helpful assistant with access to Esputnik tools via Composio.",
    max_turns=10
)
What's happening:
  • We're configuring the Claude Agent options with the MCP server URL
  • permission_mode="bypassPermissions" allows the agent to execute operations without asking for permission each time
  • The system prompt instructs the agent that it has access to Esputnik
  • max_turns=10 limits the conversation length to prevent excessive API usage

Create client and start chat loop

# Create client with context manager
async with ClaudeSDKClient(options=options) as client:
    print("\nChat started. Type 'exit' or 'quit' to end.\n")

    # Main chat loop
    while True:
        user_input = input("You: ").strip()
        if user_input.lower() in {"exit", "quit"}:
            print("Goodbye!")
            break

        # Send query
        await client.query(user_input)

        # Receive and print response
        print("Claude: ", end="", flush=True)
        async for message in client.receive_response():
            if hasattr(message, "content"):
                for block in message.content:
                    if hasattr(block, "text"):
                        print(block.text, end="", flush=True)
        print()
What's happening:
  • The Claude SDK client is created using the async context manager pattern
  • The agent processes each query and streams the response back in real-time
  • The chat loop continues until the user types 'exit' or 'quit'

Run the application

if __name__ == "__main__":
    asyncio.run(chat_with_remote_mcp())
What's happening:
  • This entry point runs the async chat_with_remote_mcp() function using asyncio.run()
  • The application will start, create the MCP connection, and begin the interactive chat session

Complete Code

Here's the complete code to get you started with Esputnik and Claude Agent SDK:

import asyncio
from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions
import os
from composio import Composio
from dotenv import load_dotenv

load_dotenv()

async def chat_with_remote_mcp():
    api_key = os.getenv("COMPOSIO_API_KEY")
    if not api_key:
        raise RuntimeError("COMPOSIO_API_KEY is not set")

    composio = Composio(api_key=api_key)

    # Create Tool Router session for Esputnik
    mcp_server = composio.create(
        user_id=os.getenv("USER_ID"),
        toolkits=["esputnik"]
    )

    url = mcp_server.mcp.url

    if not url:
        raise ValueError("Session URL not found")

    # Configure remote MCP server for Claude
    options = ClaudeAgentOptions(
        permission_mode="bypassPermissions",
        mcp_servers={
            "composio": {
                "type": "http",
                "url": url,
                "headers": {
                    "x-api-key": os.getenv("COMPOSIO_API_KEY")
                }
            }
        },
        system_prompt="You are a helpful assistant with access to Esputnik tools via Composio.",
        max_turns=10
    )

    # Create client with context manager
    async with ClaudeSDKClient(options=options) as client:
        print("\nChat started. Type 'exit' or 'quit' to end.\n")

        # Main chat loop
        while True:
            user_input = input("You: ").strip()
            if user_input.lower() in {"exit", "quit"}:
                print("Goodbye!")
                break

            # Send query
            await client.query(user_input)

            # Receive and print response
            print("Claude: ", end="", flush=True)
            async for message in client.receive_response():
                if hasattr(message, "content"):
                    for block in message.content:
                        if hasattr(block, "text"):
                            print(block.text, end="", flush=True)
            print()

if __name__ == "__main__":
    asyncio.run(chat_with_remote_mcp())

Conclusion

You've successfully built a Claude Agent SDK agent that can interact with Esputnik through Composio's Tool Router.

Key features:

  • Native MCP support through Claude's agent framework
  • Streaming responses for real-time interaction
  • Permission bypass for smooth automated workflows
You can extend this by adding more toolkits, implementing custom business logic, or building a web interface around the agent.

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FAQ

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

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.

Can I use Tool Router MCP with Claude Agent SDK?

Yes, you can. Claude Agent SDK 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.

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

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.

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 Esputnik data and credentials are handled as safely as possible.

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