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How to integrate Esputnik MCP with Pydantic AI

Connect Pydantic AI to Esputnik MCP. Bulk add 500 new email contacts, delete sms message template with id 123, and more using natural language, with authentication handled for you.

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

89 Tools

Introduction

This guide walks you through connecting Esputnik to Pydantic AI using the Composio tool router. By the end, you'll have a working Esputnik agent that can manage contacts and segments, send emails, create SMS and push messages, track contact events, and upload promo codes through natural language commands.

This guide will help you understand how to give your Pydantic AI 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.

For exact tool slugs and parameter tables, see the tool catalog in the Composio docs.

Also integrate Esputnik with

Claude CodeClaude CoworkOpenAI Agents SDKClaude Agent SDKGrok BotCodexOpenClawHermesAtomic AgentGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIAutoGen

TL;DR

Here's what you'll learn:
  • How to set up your Composio API key and User ID
  • How to create a Composio Tool Router session for Esputnik
  • How to attach an MCP Server to a Pydantic AI agent
  • How to stream responses and maintain chat history
  • How to build a simple REPL-style chat interface to test your Esputnik workflows

What is Pydantic AI?

Pydantic AI is a Python framework for building AI agents with strong typing and validation. It leverages Pydantic's data validation capabilities to create robust, type-safe AI applications.

Key features include:

  • Type Safety: Built on Pydantic for automatic data validation
  • MCP Support: Native support for Model Context Protocol servers
  • Streaming: Built-in support for streaming responses
  • Async First: Designed for async/await patterns

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:

  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

Step by step09 STEPS
1

Prerequisites

Before starting, make sure you have:
  • Python 3.9 or higher
  • A Composio account with an active API key
  • Basic familiarity with Python and async programming
2

Getting API Keys for OpenAI and Composio

OpenAI API Key
  • Go to the OpenAI dashboard and create an API key. You'll need credits to use the models, or you can connect to another model provider.
  • 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.
3

Install dependencies

bash
pip install composio pydantic-ai python-dotenv

Install the required libraries.

What's happening:

  • composio connects your agent to external SaaS tools like Esputnik
  • pydantic-ai lets you create structured AI agents with tool support
  • python-dotenv loads your environment variables securely from a .env file
4

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here
OPENAI_API_KEY=your_openai_api_key

Create a .env file in your project root.

What's happening:

  • COMPOSIO_API_KEY authenticates your agent to Composio's API
  • USER_ID associates your session with your account for secure tool access
  • OPENAI_API_KEY to access OpenAI LLMs
5

Import dependencies

python
import asyncio
import os
from dotenv import load_dotenv
from composio import Composio
from pydantic_ai import Agent
from pydantic_ai.mcp import MCPServerStreamableHTTP

load_dotenv()
What's happening:
  • We load environment variables and import required modules
  • Composio manages connections to Esputnik
  • MCPServerStreamableHTTP connects to the Esputnik MCP server endpoint
  • Agent from Pydantic AI lets you define and run the AI assistant
6

Create a Tool Router Session

python
async def main():
    api_key = os.getenv("COMPOSIO_API_KEY")
    user_id = os.getenv("USER_ID")
    if not api_key or not user_id:
        raise RuntimeError("Set COMPOSIO_API_KEY and USER_ID in your environment")

    # Create a Composio Tool Router session for Esputnik
    composio = Composio(api_key=api_key)
    session = composio.create(
        user_id=user_id,
        toolkits=["esputnik"],
    )
    url = session.mcp.url
    if not url:
        raise ValueError("Composio session did not return an MCP URL")
What's happening:
  • We're creating a Tool Router session that gives your agent access to Esputnik tools
  • The create method takes the user ID and specifies which toolkits should be available
  • The returned session.mcp.url is the MCP server URL that your agent will use
7

Initialize the Pydantic AI Agent

python
# Attach the MCP server to a Pydantic AI Agent
esputnik_mcp = MCPServerStreamableHTTP(url, headers={"x-api-key": COMPOSIO_API_KEY})
agent = Agent(
    "openai:gpt-5",
    toolsets=[esputnik_mcp],
    instructions=(
        "You are a Esputnik assistant. Use Esputnik tools to help users "
        "with their requests. Ask clarifying questions when needed."
    ),
)
What's happening:
  • The MCP client connects to the Esputnik endpoint
  • The agent uses GPT-5 to interpret user commands and perform Esputnik operations
  • The instructions field defines the agent's role and behavior
8

Build the chat interface

python
# Simple REPL with message history
history = []
print("Chat started! Type 'exit' or 'quit' to end.\n")
print("Try asking the agent to help you with Esputnik.\n")

while True:
    user_input = input("You: ").strip()
    if user_input.lower() in {"exit", "quit", "bye"}:
        print("\nGoodbye!")
        break
    if not user_input:
        continue

    print("\nAgent is thinking...\n", flush=True)

    async with agent.run_stream(user_input, message_history=history) as stream_result:
        collected_text = ""
        async for chunk in stream_result.stream_output():
            text_piece = None
            if isinstance(chunk, str):
                text_piece = chunk
            elif hasattr(chunk, "delta") and isinstance(chunk.delta, str):
                text_piece = chunk.delta
            elif hasattr(chunk, "text"):
                text_piece = chunk.text
            if text_piece:
                collected_text += text_piece
        result = stream_result

    print(f"Agent: {collected_text}\n")
    history = result.all_messages()
What's happening:
  • The agent reads input from the terminal and streams its response
  • Esputnik API calls happen automatically under the hood
  • The model keeps conversation history to maintain context across turns
9

Run the application

python
if __name__ == "__main__":
    asyncio.run(main())
What's happening:
  • The asyncio loop launches the agent and keeps it running until you exit

Complete Code

Here's the complete code to get you started with Esputnik and Pydantic AI:

python
import asyncio
import os
from dotenv import load_dotenv
from composio import Composio
from pydantic_ai import Agent
from pydantic_ai.mcp import MCPServerStreamableHTTP

load_dotenv()

async def main():
    api_key = os.getenv("COMPOSIO_API_KEY")
    user_id = os.getenv("USER_ID")
    if not api_key or not user_id:
        raise RuntimeError("Set COMPOSIO_API_KEY and USER_ID in your environment")

    # Create a Composio Tool Router session for Esputnik
    composio = Composio(api_key=api_key)
    session = composio.create(
        user_id=user_id,
        toolkits=["esputnik"],
    )
    url = session.mcp.url
    if not url:
        raise ValueError("Composio session did not return an MCP URL")

    # Attach the MCP server to a Pydantic AI Agent
    esputnik_mcp = MCPServerStreamableHTTP(url, headers={"x-api-key": COMPOSIO_API_KEY})
    agent = Agent(
        "openai:gpt-5",
        toolsets=[esputnik_mcp],
        instructions=(
            "You are a Esputnik assistant. Use Esputnik tools to help users "
            "with their requests. Ask clarifying questions when needed."
        ),
    )

    # Simple REPL with message history
    history = []
    print("Chat started! Type 'exit' or 'quit' to end.\n")
    print("Try asking the agent to help you with Esputnik.\n")

    while True:
        user_input = input("You: ").strip()
        if user_input.lower() in {"exit", "quit", "bye"}:
            print("\nGoodbye!")
            break
        if not user_input:
            continue

        print("\nAgent is thinking...\n", flush=True)

        async with agent.run_stream(user_input, message_history=history) as stream_result:
            collected_text = ""
            async for chunk in stream_result.stream_output():
                text_piece = None
                if isinstance(chunk, str):
                    text_piece = chunk
                elif hasattr(chunk, "delta") and isinstance(chunk.delta, str):
                    text_piece = chunk.delta
                elif hasattr(chunk, "text"):
                    text_piece = chunk.text
                if text_piece:
                    collected_text += text_piece
            result = stream_result

        print(f"Agent: {collected_text}\n")
        history = result.all_messages()

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

Conclusion

You've built a Pydantic AI agent that can interact with Esputnik through Composio's Tool Router. With this setup, your agent can perform real Esputnik actions through natural language. You can extend this further by:
  • Adding other toolkits like Gmail, HubSpot, or Salesforce
  • Building a web-based chat interface around this agent
  • Using multiple MCP endpoints to enable cross-app workflows (for example, Gmail + Esputnik for workflow automation)
This architecture makes your AI agent "agent-native", able to securely use APIs in a unified, composable way without custom integrations.
TOOLS

Supported Tools

Every Esputnik action and event your agent gets out of the box.

Add Contact

Add or update a single eSputnik contact, matching existing contacts by channel; new contacts are treated as confirmed.

Add Domain

Register a domain with eSputnik for web tracking, widgets, or web push notifications.

Add Orders Bulk

Tool to transfer orders in bulk to eSputnik.

Add Unsubscribed Emails

Add email addresses to the unsubscribed list.

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 3,000 contacts asynchronously, matching on the selected deduplication channel; new contacts are treated as confirmed.

Change Mobile Push Token Activity

Activate or deactivate a registered eSputnik mobile push token for an application to control whether a device can receive push notifications.

Create API Token

Generate an eSputnik API token using the configured credentials.

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

Remove contacts from a static segment by internal contact IDs or external customer IDs, with at most 500 entries per ID list.

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 a contact by its internal eSputnik ID, including available profile details, supported communication channels, and custom fields.

Get Contact Emails

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

Get Contact Import Status

Retrieve the status of an asynchronous contact import session using its session ID.

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 eSputnik email message by ID, returning available content, subject, sender details, and CSS fields.

Get Email View Link

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

Get Message Status

Retrieve delivery status for single messages sent through the eSputnik API using comma-separated request IDs returned by send operations.

Get Mobile Push Message

Retrieves an eSputnik mobile push message by ID, returning available message fields such as title, text, time-to-live and sound settings.

Get Organization Balance

Retrieve the authenticated eSputnik organization's balance and currency, along with credit limit and bonus email and SMS resources when available.

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 an asynchronous preprocessor file upload session using its session ID.

Get Product Feeds Configuration

Retrieve eSputnik product feed configuration to inspect the account's feed settings.

Get Promocodes Count

Get the number of available promotional codes in eSputnik.

Get Site Domain

Retrieve the authenticated organization's eSputnik domain configuration to check its configured site domain.

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 eSputnik SMS message templates by name or tag, with pagination and up to 500 requested per page.

Search Telegram Messages

Search eSputnik Telegram bot messages by name or tag, with pagination and up to 500 requested per page.

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 to one or more addresses via eSputnik, with HTML and optional plain text, AMP content, and URL tracking; missing recipient contacts are automatically created.

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

Update an existing eSputnik base App Inbox message by ID.

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

Upload a preprocessor data file from an external URL with an optional TTL.

Upload Promotional Codes

Tool to upload promotional codes to eSputnik in bulk.

FRAMEWORKS

How to build Esputnik MCP Agent with another framework

Claude Code logo

Claude Code

Use Esputnik MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Esputnik MCP with Claude Cowork

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Esputnik MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Esputnik MCP with Claude Agent SDK

Grok Bot logo

Grok Bot

Use Esputnik MCP with Grok Bot

Codex logo

Codex

Use Esputnik MCP with Codex

OpenClaw logo

OpenClaw

Use Esputnik MCP with OpenClaw

Hermes logo

Hermes

Use Esputnik MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Esputnik MCP with Atomic Agent

Google ADK logo

Google ADK

Use Esputnik MCP with Google ADK

LangChain logo

LangChain

Use Esputnik MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Esputnik MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Esputnik MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Esputnik MCP with LlamaIndex

CrewAI logo

CrewAI

Use Esputnik MCP with CrewAI

AutoGen logo

AutoGen

Use Esputnik MCP with AutoGen

FAQ

Frequently asked questions

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