How to integrate Cloudcart MCP with Pydantic AI

This guide walks you through connecting Cloudcart to Pydantic AI using the Composio tool router. By the end, you'll have a working Cloudcart agent that can add three t-shirts to a customer’s cart, create a new product called summer mug, register a new customer with email and name through natural language commands. This guide will help you understand how to give your Pydantic AI agent real control over a Cloudcart account through Composio's Cloudcart MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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CloudCart is an e-commerce platform for building and managing online stores. It helps businesses streamline product listings, orders, and customer engagement.

150 Tools

Introduction

This guide walks you through connecting Cloudcart to Pydantic AI using the Composio tool router. By the end, you'll have a working Cloudcart agent that can add three t-shirts to a customer’s cart, create a new product called summer mug, register a new customer with email and name through natural language commands.

This guide will help you understand how to give your Pydantic AI agent real control over a Cloudcart account through Composio's Cloudcart MCP server.

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

Also integrate Cloudcart with

OpenAI Agents SDKClaude Agent SDKClaude CodeClaude CoworkCodexOpenClawHermesCLIGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAI

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 Cloudcart
  • 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 Cloudcart 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 Cloudcart MCP server, and what's possible with it?

The Cloudcart MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Cloudcart account. It provides structured and secure access to your online store, so your agent can perform actions like managing products, handling customer accounts, processing orders, and organizing categories on your behalf.

  • Product and inventory management: Add new products, create variants, and update your store catalog efficiently through your agent.
  • Customer onboarding and management: Register new customers or update existing profiles, enabling seamless customer experiences directly from your agent.
  • Order processing and cart handling: Let your agent create new orders, add items to carts, or clear carts to streamline the purchase flow.
  • Category and vendor organization: Create new product categories or onboard vendors, keeping your store organized and expanding easily.
  • Variant configuration and customization: Add or update product variants and their parameters, allowing your agent to manage different product options and custom attributes.

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 Cloudcart
  • 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 Cloudcart
  • MCPServerStreamableHTTP connects to the Cloudcart 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 Cloudcart
    composio = Composio(api_key=api_key)
    session = composio.create(
        user_id=user_id,
        toolkits=["cloudcart"],
    )
    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 Cloudcart 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
cloudcart_mcp = MCPServerStreamableHTTP(url, headers={"x-api-key": COMPOSIO_API_KEY})
agent = Agent(
    "openai:gpt-5",
    toolsets=[cloudcart_mcp],
    instructions=(
        "You are a Cloudcart assistant. Use Cloudcart tools to help users "
        "with their requests. Ask clarifying questions when needed."
    ),
)
What's happening:
  • The MCP client connects to the Cloudcart endpoint
  • The agent uses GPT-5 to interpret user commands and perform Cloudcart 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 Cloudcart.\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
  • Cloudcart 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 Cloudcart 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 Cloudcart
    composio = Composio(api_key=api_key)
    session = composio.create(
        user_id=user_id,
        toolkits=["cloudcart"],
    )
    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
    cloudcart_mcp = MCPServerStreamableHTTP(url, headers={"x-api-key": COMPOSIO_API_KEY})
    agent = Agent(
        "openai:gpt-5",
        toolsets=[cloudcart_mcp],
        instructions=(
            "You are a Cloudcart assistant. Use Cloudcart 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 Cloudcart.\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 Cloudcart through Composio's Tool Router. With this setup, your agent can perform real Cloudcart 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 + Cloudcart 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 Cloudcart action and event your agent gets out of the box.

Add Category Properties

Tool to add properties to a category relationship.

Add to Cart

Tool to add an item to the cart.

Clear Cart

Tool to remove all items from the specified cart.

Create Blog Category

Tool to create a new blog category in CloudCart.

Create Blog Post

Tool to create a new blog post in CloudCart.

Create Blog Tag

Tool to create a new blog tag in CloudCart.

Create Category

Tool to create a new category.

Create Customer

Tool to create a new customer in CloudCart.

Create Customer Billing Address

Tool to create a new customer billing address.

Create Customer Groups

Tool to create a new customer group in CloudCart.

Create Customer Shipping Address

Tool to create a customer shipping address in CloudCart.

Create Customer Tag

Tool to create a new customer tag in CloudCart.

Create Discount

Tool to create a new discount in CloudCart.

Create Discount Code

Create a new discount code in CloudCart.

Create Image

Tool to create a new image for a product.

Create Linked Products

Tool to create linked product relationships in CloudCart.

Create Order

Tool to create a new order.

Create Product

Creates a new product in CloudCart catalog.

Create Products Property Options

Tool to add property options to a product relationship.

Create Product to Discount

Tool to create a product to discount relationship in CloudCart.

Create Property

Tool to create a new property in CloudCart.

Create Property Option

Tool to create a new property option.

Create Redirect

Create a new URL redirect in CloudCart.

Create Subscriber

Tool to create a new subscriber in CloudCart.

Create Subscriber Channel

Tool to create a new subscriber channel in CloudCart.

Create Subscriber Tag

Tool to create a new subscriber-tag association in CloudCart.

Create Variant

Tool to create a new product variant for a given product.

Create Variant Option

Tool to create a new variant option for a specific product variant.

Create Variant Options

Tool to create a new variant option.

Create Variant Parameter

Tool to create a new variant parameter for a product variant.

Create Variant Parameter

Tool to create a new variant parameter definition.

Create Vendor

Create a new vendor in your CloudCart store.

Create Webhook

Tool to create a new webhook subscription in CloudCart.

Delete Blog Category

Tool to delete a blog category by its ID.

Delete Blog Post

Tool to delete a blog post by its ID.

Delete Blog Tag

Tool to delete a blog tag by its ID.

Delete Category

Tool to delete a category by its ID.

Delete Customer

Tool to delete a customer.

Delete Customer Billing Address

Tool to delete a customer billing address by its ID.

Delete Customer Group

Tool to delete a customer group by its ID.

Delete Customer Shipping Address

Tool to delete a customer shipping address.

Delete Customer Tag

Tool to delete a customer tag by its ID.

Delete Discount

Tool to delete a discount by its ID.

Delete Discount Code

Tool to delete a discount code by its ID.

Delete Image

Tool to delete an image by its ID.

Delete Order

Tool to delete an order.

Delete Product

Tool to delete a product by its ID.

Delete Linked Products

Tool to delete linked product relationships in CloudCart.

Delete Product To Discount

Tool to delete a product-to-discount relationship by its ID.

Delete Property

Tool to delete a property by its ID.

Delete Property Options

Tool to delete a property option by its ID.

Delete Redirect

Tool to delete a redirect by its ID.

Delete Subscriber

Tool to delete a subscriber by their ID.

Delete Subscribers Channel

Tool to delete a subscriber channel by ID.

Delete Subscriber Tag

Tool to delete a subscriber tag by its ID.

Delete Variant

Tool to delete a variant by its ID.

Delete Variant Option

Tool to delete a variant option by its ID.

Delete Variant Parameter

Tool to delete a variant parameter by its ID.

Delete Vendor

Delete a vendor by its ID from the CloudCart store.

Delete Webhook

Tool to delete a webhook by its ID from the CloudCart store.

Generate Discount Codes

Tool to generate multiple discount codes with a specified discount percentage.

Get Blog Author

Tool to retrieve details of a specific blog author by ID.

Get Blog Category

Tool to retrieve details of a specific blog category by ID.

Get Blog Post

Tool to retrieve a single blog post by its ID.

Get Blog Tag

Tool to retrieve details of a specific blog tag by ID.

Get Cart

Tool to retrieve the current shopping cart.

Get Categories

Tool to retrieve a list of all categories.

Get Category Properties

Tool to retrieve properties relationship for a category.

Get Category

Tool to retrieve details of a specific category by ID.

Get Customer

Tool to retrieve details of a specific customer by ID.

Get Customer Billing Address

Tool to retrieve a specific customer billing address by its ID.

Get Customer Group

Tool to retrieve details of a specific customer group by ID.

Get Customer Groups Customers

Tool to retrieve customers from a specific customer group.

Get Customers

Tool to retrieve a list of all customers.

Get Customer Shipping Address

Tool to retrieve a single customer shipping address by ID.

Get Customer Tag

Tool to retrieve details of a specific customer tag.

Get Image

Tool to retrieve details of a specific image by ID.

Get Orders

Retrieve a paginated list of orders from your CloudCart store.

Get Payment Methods

Tool to retrieve all available payment methods.

Get Products

Tool to retrieve a list of products with optional filters.

Get Products Linked Product

Tool to retrieve linked products for a specific product.

Get Products Linked Products

Tool to retrieve linked products for a specific product.

Get Product With Relations

Retrieves detailed information about a specific product including its relationships (category, vendor, variants).

Get Property

Tool to retrieve details of a specific property by ID.

Get Property Option

Tool to retrieve details of a specific property option by ID.

Get Property Options Relationship

Tool to retrieve property options relationship for a product.

Get Shipping Methods

Tool to retrieve all available shipping methods.

Get Subscriber

Tool to retrieve details of a specific subscriber by ID.

Get Subscribers Channel

Tool to retrieve a single subscriber channel by its ID.

Get Subscriber Tag

Tool to retrieve details of a specific subscriber tag by ID.

Get Variant

Tool to retrieve details of a specific variant by ID.

Get Variant Option

Tool to retrieve a specific variant option by its ID.

Get Variant Parameter

Tool to retrieve details of a specific variant parameter by ID.

Get Vendor

Tool to retrieve details of a specific vendor.

Get Webhook

Tool to retrieve details of a specific webhook by ID.

List Blog Categories

Tool to retrieve all blog categories with optional pagination, sorting, and filtering.

List Blog Posts

Tool to retrieve a list of all blog posts.

List Blog Tags

Tool to retrieve all blog tags from CloudCart.

List Customer Billing Addresses

Tool to retrieve a list of all customer billing addresses.

List Customer Groups

Tool to retrieve all customer groups.

List Customer Shipping Addresses

Tool to retrieve a paginated list of customer shipping addresses.

List Customer Tags

Tool to retrieve all customer tags.

List Discount Codes

Tool to retrieve all discount codes from your CloudCart store.

List Images

Tool to retrieve all images from CloudCart.

List Order Billing Addresses

Tool to retrieve order billing addresses (read-only).

List Order Payments

Retrieve payment information from orders.

List Order Payment V2

Tool to retrieve order payment data from the CloudCart order-payment endpoint.

List Order Products

Retrieve all order products from your CloudCart store (read-only).

List Order Products Options

Tool to retrieve order products options (read-only).

List Order Shipping

Tool to retrieve order shipping data.

List Order Shipping Addresses

Tool to retrieve a paginated list of order shipping addresses.

List Order Status

Tool to retrieve all available order statuses from CloudCart.

List Payment Providers

Tool to retrieve all payment providers (read-only).

List Properties

Tool to retrieve all properties with optional pagination.

List Property Options

Tool to retrieve all property options with optional filtering and pagination.

List Redirects

Tool to retrieve all redirects from CloudCart.

List Shipping Providers

Tool to retrieve all shipping providers (read-only).

List Subscribers

Tool to retrieve all subscribers from the store.

List Subscribers Channels

Tool to retrieve all subscriber channels.

List Subscribers Tags

Tool to retrieve all subscriber tags.

List Variant Options

Tool to retrieve all variant options.

List Variant Parameters

Tool to retrieve all variant parameters with pagination support.

List Variants

Tool to retrieve all product variants with optional pagination and filtering.

List Vendors

Tool to retrieve a list of all vendors.

List Webhooks

Tool to retrieve all webhooks.

Remove from Cart

Tool to remove an item from the cart.

Update Blog Category

Tool to update an existing blog category.

Update Blog Post

Tool to update an existing blog post.

Update Blog Tag

Tool to update an existing blog tag.

Update Cart Item

Tool to update the quantity of an item in the cart.

Update Category

Tool to update an existing category.

Update Customer

Updates an existing customer's information in CloudCart.

Update Customer Billing Address

Tool to update an existing customer billing address in CloudCart.

Update Customer Group

Tool to update an existing customer group's name.

Update Customer Shipping Address

Tool to update an existing customer shipping address in CloudCart.

Update Customer Tag

Tool to update an existing customer tag in CloudCart.

Update Discount Code

Tool to update an existing discount code in CloudCart.

Update Linked Product

Updates linked product relationships for a specific product in CloudCart.

Update Order

Tool to update an existing order.

Update Product

Updates an existing product in CloudCart.

Update Property

Tool to update an existing property.

Update Property Option

Tool to update an existing property option.

Update Subscriber

Tool to update an existing subscriber in CloudCart.

Update Subscribers Channel

Tool to update an existing subscriber channel in CloudCart.

Update Subscriber Tag

Tool to update an existing subscriber tag association in CloudCart.

Update Variant

Tool to update an existing product variant.

Update Variant Option

Tool to update an existing variant option.

Update Variant Parameter

Tool to update an existing variant parameter for a product variant.

Update Vendor

Updates an existing vendor's information in CloudCart.

Update Webhook

Tool to update an existing webhook configuration in CloudCart.

FRAMEWORKS

How to build Cloudcart MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Cloudcart MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Cloudcart MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Cloudcart MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Cloudcart MCP with Claude Cowork

Codex logo

Codex

Use Cloudcart MCP with Codex

OpenClaw logo

OpenClaw

Use Cloudcart MCP with OpenClaw

Hermes logo

Hermes

Use Cloudcart MCP with Hermes

CLI logo

CLI

Use Cloudcart MCP with CLI

Google ADK logo

Google ADK

Use Cloudcart MCP with Google ADK

LangChain logo

LangChain

Use Cloudcart MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Cloudcart MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Cloudcart MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Cloudcart MCP with LlamaIndex

CrewAI logo

CrewAI

Use Cloudcart MCP with CrewAI

FAQ

Frequently asked questions

With a standalone Cloudcart MCP server, the agents and LLMs can only access a fixed set of Cloudcart tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Cloudcart and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Pydantic AI 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 Cloudcart tools.

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

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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.

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Co-founder, Opennote

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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.

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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.

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Co-Founder, Ingram Technologies