How to integrate Magnetic MCP with OpenAI Agents SDK

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Introduction

This guide walks you through connecting Magnetic to the OpenAI Agents SDK using the Composio tool router. By the end, you'll have a working Magnetic agent that can list all upcoming follow-ups for me, search client contacts by company name, get all tags for contact id 123, show all users in my organization through natural language commands.

This guide will help you understand how to give your OpenAI Agents SDK agent real control over a Magnetic account through Composio's Magnetic MCP server.

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

TL;DR

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

What is open-ai-agents-sdk?

The OpenAI Agents SDK is a lightweight framework for building AI agents that can use tools and maintain conversation state. It provides a simple interface for creating agents with hosted MCP tool support.

Key features include:

  • Hosted MCP Tools: Connect to external services through hosted MCP endpoints
  • SQLite Sessions: Persist conversation history across interactions
  • Simple API: Clean interface with Agent, Runner, and tool configuration
  • Streaming Support: Real-time response streaming for interactive applications

What is the Magnetic MCP server, and what's possible with it?

The Magnetic MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Magnetic account. It provides structured and secure access to your projects, client contacts, users, and task data, so your agent can perform actions like managing follow-ups, searching contacts, retrieving project statuses, and organizing your team’s workflow with ease.

  • Personal follow-up and task management: Automatically retrieve your upcoming follow-ups or tasks so you never miss important deadlines or action items.
  • Client contact discovery and tagging: Search for client contacts using specific criteria and view all tags associated with any contact to keep your CRM up to date and organized.
  • Project grouping and status tracking: Fetch groupings, view their statuses, and retrieve project-related tags to stay on top of ongoing jobs and opportunities.
  • User and team information access: Instantly pull details about any team member or audit the list of all users in your company for better collaboration and resource planning.
  • Opportunity status monitoring: Check the latest opportunity statuses to track sales pipelines or unsigned deals directly from your agent.

Supported Tools & Triggers

Tools
Get Current Follow-upsTool to retrieve upcoming follow-ups assigned to the authenticated user.
Search Client ContactsTool to search contacts by field or client id.
Get Contact TagsTool to get all tags associated with a contact.
Get Magnetic GroupingsTool to retrieve a list of groupings.
Get Grouping StatusesTool to retrieve the list of statuses for signed groupings.
Get Grouping TagsTool to retrieve tags associated with any groupings owned by the company.
Get Magnetic Opportunity StatusesTool to retrieve opportunity statuses.
Get Magnetic TaskTool to retrieve a task by its id.
Get Magnetic User by IDTool to get a magnetic user's details by id.
Get UsersTool to retrieve the list of all users in the authenticated user's company.
Get Grouping Custom Field DefinitionsTool to retrieve all custom field definitions for groupings.
Search Magnetic TasksTool to search tasks by a specified field and value.

What is the Composio tool router, and how does it fit here?

What is Tool Router?

Composio's Tool Router 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 Tool Router

The tool router generates a secure MCP URL that your agents can access to perform actions.

How the Tool Router works

The Tool Router 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 OpenAI API Key
  • Primary know-how of OpenAI Agents SDK
  • A live Magnetic project
  • Some knowledge of Python or Typescript

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

Install dependencies

pip install composio_openai_agents openai-agents python-dotenv

Install the Composio SDK and the OpenAI Agents SDK.

Set up environment variables

bash
OPENAI_API_KEY=sk-...your-api-key
COMPOSIO_API_KEY=your-api-key
USER_ID=composio_user@gmail.com

Create a .env file and add your OpenAI and Composio API keys.

Import dependencies

import asyncio
import os
from dotenv import load_dotenv

from composio import Composio
from composio_openai_agents import OpenAIAgentsProvider
from agents import Agent, Runner, HostedMCPTool, SQLiteSession
What's happening:
  • You're importing all necessary libraries.
  • The Composio and OpenAIAgentsProvider classes are imported to connect your OpenAI agent to Composio tools like Magnetic.

Set up the Composio instance

load_dotenv()

api_key = os.getenv("COMPOSIO_API_KEY")
user_id = os.getenv("USER_ID")

if not api_key:
    raise RuntimeError("COMPOSIO_API_KEY is not set. Create a .env file with COMPOSIO_API_KEY=your_key")

# Initialize Composio
composio = Composio(api_key=api_key, provider=OpenAIAgentsProvider())
What's happening:
  • load_dotenv() loads your .env file so OPENAI_API_KEY and COMPOSIO_API_KEY are available as environment variables.
  • Creating a Composio instance using the API Key and OpenAIAgentsProvider class.

Create a Tool Router session

# Create a Magnetic Tool Router session
session = composio.create(
    user_id=user_id,
    toolkits=["magnetic"]
)

mcp_url = session.mcp.url

What is happening:

  • You give the Tool Router the user id and the toolkits you want available. Here, it is only magnetic.
  • The router checks the user's Magnetic connection and prepares the MCP endpoint.
  • The returned session.mcp.url is the MCP URL that your agent will use to access Magnetic.
  • This approach keeps things lightweight and lets the agent request Magnetic tools only when needed during the conversation.

Configure the agent

# Configure agent with MCP tool
agent = Agent(
    name="Assistant",
    model="gpt-5",
    instructions=(
        "You are a helpful assistant that can access Magnetic. "
        "Help users perform Magnetic operations through natural language."
    ),
    tools=[
        HostedMCPTool(
            tool_config={
                "type": "mcp",
                "server_label": "tool_router",
                "server_url": mcp_url,
                "headers": {"x-api-key": api_key},
                "require_approval": "never",
            }
        )
    ],
)
What's happening:
  • We're creating an Agent instance with a name, model (gpt-5), and clear instructions about its purpose.
  • The agent's instructions tell it that it can access Magnetic and help with queries, inserts, updates, authentication, and fetching database information.
  • The tools array includes a HostedMCPTool that connects to the MCP server URL we created earlier.
  • The headers dict includes the Composio API key for secure authentication with the MCP server.
  • require_approval: 'never' means the agent can execute Magnetic operations without asking for permission each time, making interactions smoother.

Start chat loop and handle conversation

print("\nComposio Tool Router session created.")

chat_session = SQLiteSession("conversation_openai_toolrouter")

print("\nChat started. Type your requests below.")
print("Commands: 'exit', 'quit', or 'q' to end\n")

async def main():
    try:
        result = await Runner.run(
            agent,
            "What can you help me with?",
            session=chat_session
        )
        print(f"Assistant: {result.final_output}\n")
    except Exception as e:
        print(f"Error: {e}\n")

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

        result = await Runner.run(
            agent,
            user_input,
            session=chat_session
        )
        print(f"Assistant: {result.final_output}\n")

asyncio.run(main())
What's happening:
  • The program prints a session URL that you visit to authorize Magnetic.
  • After authorization, the chat begins.
  • Each message you type is processed by the agent using Runner.run().
  • The responses are printed to the console, and conversations are saved locally using SQLite.
  • Typing exit, quit, or q cleanly ends the chat.

Complete Code

Here's the complete code to get you started with Magnetic and open-ai-agents-sdk:

import asyncio
import os
from dotenv import load_dotenv

from composio import Composio
from composio_openai_agents import OpenAIAgentsProvider
from agents import Agent, Runner, HostedMCPTool, SQLiteSession

load_dotenv()

api_key = os.getenv("COMPOSIO_API_KEY")
user_id = os.getenv("USER_ID")

if not api_key:
    raise RuntimeError("COMPOSIO_API_KEY is not set. Create a .env file with COMPOSIO_API_KEY=your_key")

# Initialize Composio
composio = Composio(api_key=api_key, provider=OpenAIAgentsProvider())

# Create Tool Router session
session = composio.create(
    user_id=user_id,
    toolkits=["magnetic"]
)
mcp_url = session.mcp.url

# Configure agent with MCP tool
agent = Agent(
    name="Assistant",
    model="gpt-5",
    instructions=(
        "You are a helpful assistant that can access Magnetic. "
        "Help users perform Magnetic operations through natural language."
    ),
    tools=[
        HostedMCPTool(
            tool_config={
                "type": "mcp",
                "server_label": "tool_router",
                "server_url": mcp_url,
                "headers": {"x-api-key": api_key},
                "require_approval": "never",
            }
        )
    ],
)

print("\nComposio Tool Router session created.")

chat_session = SQLiteSession("conversation_openai_toolrouter")

print("\nChat started. Type your requests below.")
print("Commands: 'exit', 'quit', or 'q' to end\n")

async def main():
    try:
        result = await Runner.run(
            agent,
            "What can you help me with?",
            session=chat_session
        )
        print(f"Assistant: {result.final_output}\n")
    except Exception as e:
        print(f"Error: {e}\n")

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

        result = await Runner.run(
            agent,
            user_input,
            session=chat_session
        )
        print(f"Assistant: {result.final_output}\n")

asyncio.run(main())

Conclusion

This was a starter code for integrating Magnetic MCP with OpenAI Agents SDK to build a functional AI agent that can interact with Magnetic.

Key features:

  • Hosted MCP tool integration through Composio's Tool Router
  • SQLite session persistence for conversation history
  • Simple async chat loop for interactive testing
You can extend this by adding more toolkits, implementing custom business logic, or building a web interface around the agent.

How to build Magnetic MCP Agent with another framework

Claude Agent SDK

Claude Agent SDK

Use Magnetic MCP with Claude Agent SDK

Google ADK

Google ADK

Use Magnetic MCP with Google ADK

LangChain

LangChain

Use Magnetic MCP with LangChain

Vercel AI SDK

Vercel AI SDK

Use Magnetic MCP with Vercel AI SDK

Mastra AI

Mastra AI

Use Magnetic MCP with Mastra AI

LlamaIndex

LlamaIndex

Use Magnetic MCP with LlamaIndex

CrewAI

CrewAI

Use Magnetic MCP with CrewAI

FAQ

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

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

Can I use Tool Router MCP with OpenAI Agents SDK?

Yes, you can. OpenAI Agents 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 Magnetic tools.

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

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

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