How to integrate Whoisfreaks MCP with OpenAI Agents SDK

This guide walks you through connecting Whoisfreaks to the OpenAI Agents SDK using the Composio tool router. By the end, you'll have a working Whoisfreaks agent that can get whois info for google.com, check domain registration status for mysite.io, list recent ownership changes for example.org through natural language commands. This guide will help you understand how to give your OpenAI Agents SDK agent real control over a Whoisfreaks account through Composio's Whoisfreaks MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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Whoisfreaks is a leading provider of domain WHOIS database and API services. Instantly access comprehensive domain ownership and registration data for research and monitoring.

18 Tools

Introduction

This guide walks you through connecting Whoisfreaks to the OpenAI Agents SDK using the Composio tool router. By the end, you'll have a working Whoisfreaks agent that can get whois info for google.com, check domain registration status for mysite.io, list recent ownership changes for example.org through natural language commands.

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

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

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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 Whoisfreaks
  • Configure an AI agent that can use Whoisfreaks as a tool
  • Run a live chat session where you can ask the agent to perform Whoisfreaks operations

What is OpenAI 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 Whoisfreaks MCP server, and what's possible with it?

The Whoisfreaks MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Whoisfreaks account. It provides structured and secure access so your agent can perform Whoisfreaks operations on your behalf.

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:
  • Composio API Key and OpenAI API Key
  • Primary know-how of OpenAI Agents SDK
  • A live Whoisfreaks project
  • Some knowledge of Python or Typescript
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
3

Install dependencies

npm install @composio/openai-agents @openai/agents dotenv

Install the Composio SDK and the OpenAI Agents SDK.

4

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.

5

Import dependencies

import 'dotenv/config';
import { Composio } from '@composio/core';
import { OpenAIAgentsProvider } from '@composio/openai-agents';
import { Agent, hostedMcpTool, run, OpenAIConversationsSession } from '@openai/agents';
import * as readline from 'readline';
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 Whoisfreaks.
6

Set up the Composio instance

dotenv.config();

const composioApiKey = process.env.COMPOSIO_API_KEY;
const userId = process.env.USER_ID;

if (!composioApiKey) {
  throw new Error('COMPOSIO_API_KEY is not set. Create a .env file with COMPOSIO_API_KEY=your_key');
}
if (!userId) {
  throw new Error('USER_ID is not set');
}

// Initialize Composio
const composio = new Composio({
  apiKey: composioApiKey,
  provider: new OpenAIAgentsProvider(),
});
What's happening:
  • dotenv.config() loads your .env file so COMPOSIO_API_KEY and USER_ID are available as environment variables.
  • Creating a Composio instance using the API Key and OpenAIAgentsProvider class.
7

Create a Tool Router session

// Create Tool Router session for Whoisfreaks
const session = await composio.create(userId as string, {
  toolkits: ['whoisfreaks'],
});
const mcpUrl = session.mcp.url;

What is happening:

  • You give the Tool Router the user id and the toolkits you want available. Here, it is only whoisfreaks.
  • The router checks the user's Whoisfreaks connection and prepares the MCP endpoint.
  • The returned session.mcp.url is the MCP URL that your agent will use to access Whoisfreaks.
  • This approach keeps things lightweight and lets the agent request Whoisfreaks tools only when needed during the conversation.
8

Configure the agent

// Configure agent with MCP tool
const agent = new Agent({
  name: 'Assistant',
  model: 'gpt-5',
  instructions:
    'You are a helpful assistant that can access Whoisfreaks. Help users perform Whoisfreaks operations through natural language.',
  tools: [
    hostedMcpTool({
      serverLabel: 'tool_router',
      serverUrl: mcpUrl,
      headers: { 'x-api-key': composioApiKey },
      requireApproval: '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 Whoisfreaks 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 object includes the Composio API key for secure authentication with the MCP server.
  • requireApproval: 'never' means the agent can execute Whoisfreaks operations without asking for permission each time, making interactions smoother.
9

Start chat loop and handle conversation

// Keep conversation state across turns
const conversationSession = new OpenAIConversationsSession();

// Simple CLI
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
  prompt: 'You: ',
});

console.log('\nComposio Tool Router session created.');
console.log('\nChat started. Type your requests below.');
console.log("Commands: 'exit', 'quit', or 'q' to end\n");

try {
  const first = await run(agent, 'What can you help me with?', { session: conversationSession });
  console.log(`Assistant: ${first.finalOutput}\n`);
} catch (e) {
  console.error('Error:', e instanceof Error ? e.message : e, '\n');
}

rl.prompt();

rl.on('line', async (userInput) => {
  const text = userInput.trim();

  if (['exit', 'quit', 'q'].includes(text.toLowerCase())) {
    console.log('Goodbye!');
    rl.close();
    process.exit(0);
  }

  if (!text) {
    rl.prompt();
    return;
  }

  try {
    const result = await run(agent, text, { session: conversationSession });
    console.log(`\nAssistant: ${result.finalOutput}\n`);
  } catch (e) {
    console.error('Error:', e instanceof Error ? e.message : e, '\n');
  }

  rl.prompt();
});

rl.on('close', () => {
  console.log('\n👋 Session ended.');
  process.exit(0);
});
What's happening:
  • The program prints a session URL that you visit to authorize Whoisfreaks.
  • After authorization, the chat begins.
  • Each message you type is processed by the agent using run().
  • The responses are printed to the console.
  • Typing exit, quit, or q cleanly ends the chat.

Complete Code

Here's the complete code to get you started with Whoisfreaks and OpenAI Agents SDK:

import 'dotenv/config';
import { Composio } from '@composio/core';
import { OpenAIAgentsProvider } from '@composio/openai-agents';
import { Agent, hostedMcpTool, run, OpenAIConversationsSession } from '@openai/agents';
import * as readline from 'readline';

const composioApiKey = process.env.COMPOSIO_API_KEY;
const userId = process.env.USER_ID;

if (!composioApiKey) {
  throw new Error('COMPOSIO_API_KEY is not set. Create a .env file with COMPOSIO_API_KEY=your_key');
}
if (!userId) {
  throw new Error('USER_ID is not set');
}

// Initialize Composio
const composio = new Composio({
  apiKey: composioApiKey,
  provider: new OpenAIAgentsProvider(),
});

async function main() {
  // Create Tool Router session
  const session = await composio.create(userId as string, {
    toolkits: ['whoisfreaks'],
  });
  const mcpUrl = session.mcp.url;

  // Configure agent with MCP tool
  const agent = new Agent({
    name: 'Assistant',
    model: 'gpt-5',
    instructions:
      'You are a helpful assistant that can access Whoisfreaks. Help users perform Whoisfreaks operations through natural language.',
    tools: [
      hostedMcpTool({
        serverLabel: 'tool_router',
        serverUrl: mcpUrl,
        headers: { 'x-api-key': composioApiKey },
        requireApproval: 'never',
      }),
    ],
  });

  // Keep conversation state across turns
  const conversationSession = new OpenAIConversationsSession();

  // Simple CLI
  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    prompt: 'You: ',
  });

  console.log('\nComposio Tool Router session created.');
  console.log('\nChat started. Type your requests below.');
  console.log("Commands: 'exit', 'quit', or 'q' to end\n");

  try {
    const first = await run(agent, 'What can you help me with?', { session: conversationSession });
    console.log(`Assistant: ${first.finalOutput}\n`);
  } catch (e) {
    console.error('Error:', e instanceof Error ? e.message : e, '\n');
  }

  rl.prompt();

  rl.on('line', async (userInput) => {
    const text = userInput.trim();

    if (['exit', 'quit', 'q'].includes(text.toLowerCase())) {
      console.log('Goodbye!');
      rl.close();
      process.exit(0);
    }

    if (!text) {
      rl.prompt();
      return;
    }

    try {
      const result = await run(agent, text, { session: conversationSession });
      console.log(`\nAssistant: ${result.finalOutput}\n`);
    } catch (e) {
      console.error('Error:', e instanceof Error ? e.message : e, '\n');
    }

    rl.prompt();
  });

  rl.on('close', () => {
    console.log('\nSession ended.');
    process.exit(0);
  });
}

main().catch((err) => {
  console.error('Fatal error:', err);
  process.exit(1);
});

Conclusion

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

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.
TOOLS

Supported Tools

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

ASN WHOIS Lookup

Tool to retrieve comprehensive ASN WHOIS information including ownership, network infrastructure, and IP address ranges.

Bulk DNS Lookup

Tool to process multiple domains or IPs simultaneously, returning all DNS records in a single request (max 100).

Bulk Domain Availability Check

Tool to check availability of multiple domains in one request (max 100 domains).

Bulk WHOIS Lookup

Tool to query WHOIS information for up to 100 domains in a single request.

DNS Live Lookup

Tool to perform real-time DNS record resolution for network diagnostics and configuration verification.

Check Domain Availability

Tool to check if a domain is available for registration with optional suggestions.

Get Domain Files Status

Tool to check availability and update status of domain data files including newly registered, expired, and dropped domains.

IP Geolocation Lookup

Tool to retrieve geographic location information for an IP address including country, city, coordinates, ISP, and security details.

IP WHOIS Lookup

Tool to retrieve comprehensive WHOIS information for an IP address including organization, ISP, and network details.

Security Threat Lookup

Tool to check if an IP address is associated with malicious activity, security threats, or appears on blocklists.

SSL Certificate Lookup

Tool to fetch live SSL certificate with full secure cert chain, validity dates, and issuer information.

Subdomain Lookup

Tool to discover all subdomains associated with a domain name.

WHOIS Historical Lookup

Tool to access historical domain records from comprehensive database with up to 100 records per page.

WHOIS Live Lookup

Tool to fetch real-time WHOIS domain registration data directly from authoritative WHOIS servers.

WHOIS Live Lookup V2

Tool to fetch real-time WHOIS domain data using v2.

WHOIS Reverse Lookup By Company

Tool to search for domains registered by a specific company or organization using reverse WHOIS lookup.

WHOIS Reverse Lookup by Email

Tool to search for domains registered with a specific email address.

WHOIS Reverse Lookup By Owner

Tool to search for domains registered by a specific owner name using reverse WHOIS lookup.

FAQ

Frequently asked questions

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

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 Whoisfreaks tools.

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

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