# How to integrate OpenRegister MCP with ChatGPT Work

```json
{
  "title": "How to integrate OpenRegister MCP with ChatGPT Work",
  "toolkit": "OpenRegister",
  "toolkit_slug": "open_register",
  "framework": "ChatGPT Work",
  "framework_slug": "chatgpt",
  "url": "https://composio.dev/toolkits/open_register/framework/chatgpt",
  "markdown_url": "https://composio.dev/toolkits/open_register/framework/chatgpt.md",
  "updated_at": "2026-08-10T12:34:39.861Z"
}
```

## Introduction

### How to integrate OpenRegister MCP with ChatGPT Work
[ChatGPT Work](https://openai.com/chatgpt-work/) is an agent inside ChatGPT built for your most ambitious work. It takes action across your apps and files, stays with a project for hours, and turns a goal into finished materials like sheets, slides, and docs - not just answers.
In this guide, I will explain the easiest and most secure way to connect your OpenRegister account to ChatGPT Work via Composio Connect, so it can find ownership details for siemens ag, check insolvency records for wirecard ag, monitor new filings for volkswagen ag through natural language commands without ever putting your account credentials at risk.

## Also integrate OpenRegister with

- [Claude Cowork](https://composio.dev/toolkits/open_register/framework/claude-cowork)

## TL;DR

### Why use Composio over default connectors?
- Apps with read and write access. Default connectors mostly can read your data. Composio's OpenRegister integration lets ChatGPT Work take actions like creating drafts, sending updates, labeling records, and more.
- 1,000+ SaaS toolkits out of the box. Composio gives you instant access to a vast catalog of pre-built connectors, from Gmail and Slack to Notion, Linear, and Salesforce.
- One MCP server for every app. Connect any of your applications on demand through a single endpoint, rather than juggling a separate server for each app.
- Smart, context-aware tool loading. Unlike traditional MCP servers that dump every available tool into the LLM context window, Composio searches for and loads only the tools relevant to the task at hand.
- Cross-app automation. Chain actions across multiple apps in a single run - fetch a thread, summarize it in Notion, and post highlights to Slack without leaving the conversation.

## Connect OpenRegister to ChatGPT Work

### Prerequisites
- A ChatGPT account with access to ChatGPT Work (rolling out across Pro, Enterprise, Edu, Plus, and Business plans). We will use the [ChatGPT desktop app](https://openai.com/chatgpt/download/), which is available on every plan.
- Access to the OpenRegister workspace you want to connect.
- [Composio MCP](https://dashboard.composio.dev/login?utm_source=toolkits&utm_medium=framework_template&utm_campaign=chatgpt&utm_content=composio_connect&next=%2F~%2Forg%2Fconnect%2Fclients%2Fchatgpt).
Note: Composio connects through OAuth. You will be asked to sign in and approve specific permissions. Review the permission screen carefully if you are using a work account.
### Step-by-step: Connect OpenRegister to ChatGPT Work
### 1. Open the MCP settings
In ChatGPT Work, go to Settings and open the Plugins section. Inside the Plugins page, click the MCP tab.
### 2. Add the server
Click Add server. In the Name field enter Composio, for Type select Streamable HTTP, and in the URL field paste the Composio MCP server URL:

```bash
https://connect.composio.dev/mcp
```

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

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

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `OPEN_REGISTER_GET_COMPANY_DATA` | Get Company Data | Read one company profile, financials, historical ownership, holdings, current owners, or UBOs. Operations cost 10-25 credits; realtime profile/owners cost 20 credits. Historical ownership polls only after unbilled HTTP 202 responses and stops at the first billable HTTP 200. Financial source URLs expire after about 30 minutes and should be used immediately. |
| `OPEN_REGISTER_GET_CREDIT_USAGE` | Get Credit Usage | Check the connected OpenRegister account's plan, included and used credits, remaining balance, overage, and reset time. This request costs 0 credits. |
| `OPEN_REGISTER_GET_DOCUMENT` | Get Document | Fetch an official Handelsregister document in real time for a company or retrieve a stored document by ID. Each request costs 10 credits. The tool returns document metadata and an ephemeral URL without downloading the file; use the URL immediately. Stored URLs are valid for 15 minutes, while the realtime URL expiry is not documented. |
| `OPEN_REGISTER_GET_INSOLVENCY` | Get Insolvency | Get one insolvency proceeding and its complete published event history, including linked entities, status, court, case dates, administration, distributions, and event-specific details. Costs 10 OpenRegister credits. |
| `OPEN_REGISTER_GET_PERSON_DATA` | Get Person Data | Read a person's profile and management positions or the companies in which they hold ownership stakes. Each request costs 10 credits. |
| `OPEN_REGISTER_LIST_MONITORS` | List Monitors | List every company and person monitor for the connected OpenRegister account, including disabled monitors. This unpaginated read costs zero credits and was verified as available on a free account. It does not create, re-enable, or delete monitors. |
| `OPEN_REGISTER_LOOKUP_COMPANY_BY_URL` | Look Up Company by URL | Resolve a fully qualified company website URL to its OpenRegister company ID and available contact details. Each lookup costs 10 credits. |
| `OPEN_REGISTER_SEARCH_COMPANIES` | Search Companies | Find companies by name or structured criteria. Use autocomplete for a fast 1-credit lookup, or advanced search for filters, location, and paginated results at 10 credits per page. |
| `OPEN_REGISTER_SEARCH_INSOLVENCIES` | Search Insolvencies | Search German insolvency proceedings by free text or structured debtor, proceeding, status, date, company, or person criteria. Returns one page at a time; each page costs 10 OpenRegister credits. |
| `OPEN_REGISTER_SEARCH_PEOPLE` | Search People | Search natural persons by name, birth date, city, or active status. Each returned page costs 10 credits. |

## Supported Triggers

None listed.

## Creating MCP Server - Stand-alone vs Composio SDK

Once connected, ChatGPT Work can access the OpenRegister MCP server via Composio to run actions that you authorize, directly in your workspace.

## Complete Code

None listed.

## How to build OpenRegister MCP Agent with another framework

- [Claude Cowork](https://composio.dev/toolkits/open_register/framework/claude-cowork)

## Related Toolkits

- [Excel](https://composio.dev/toolkits/excel) - Microsoft Excel is a robust spreadsheet application for organizing, analyzing, and visualizing data. It's the go-to tool for calculations, reporting, and flexible data management.
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- [Agentql](https://composio.dev/toolkits/agentql) - Agentql is a toolkit that connects AI agents to the web using a specialized query language. It enables structured web interaction and data extraction for smarter automations.
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- [Anonyflow](https://composio.dev/toolkits/anonyflow) - Anonyflow is a service for encryption-based data anonymization and secure data sharing. It helps organizations meet GDPR, CCPA, and HIPAA data privacy compliance requirements.
- [Api ninjas](https://composio.dev/toolkits/api_ninjas) - Api ninjas offers 120+ public APIs spanning categories like weather, finance, sports, and more. Developers use it to supercharge apps with real-time data and actionable endpoints.
- [Api sports](https://composio.dev/toolkits/api_sports) - Api sports is a comprehensive sports data platform covering 2,000+ competitions with live scores and 15+ years of stats. Instantly access up-to-date sports information for analysis, apps, or chatbots.
- [Apify](https://composio.dev/toolkits/apify) - Apify is a cloud platform for building, deploying, and managing web scraping and automation tools called Actors. It lets you automate data extraction and workflow tasks at scale—no infrastructure headaches.
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- [Bigpicture io](https://composio.dev/toolkits/bigpicture_io) - BigPicture.io offers APIs for accessing detailed company and profile data. Instantly enrich your applications with up-to-date insights on 20M+ businesses.
- [Bitquery](https://composio.dev/toolkits/bitquery) - Bitquery is a blockchain data platform offering indexed, real-time, and historical data from 40+ blockchains via GraphQL APIs. Get unified, reliable access to complex on-chain data for analytics, trading, and research.
- [Brightdata](https://composio.dev/toolkits/brightdata) - Brightdata is a leading web data platform offering advanced scraping, SERP APIs, and anti-bot tools. It lets you collect public web data at scale, bypassing blocks and friction.
- [Builtwith](https://composio.dev/toolkits/builtwith) - BuiltWith is a web technology profiler that uncovers the technologies powering any website. Gain actionable insights into analytics, hosting, and content management stacks for smarter research and lead generation.
- [Byteforms](https://composio.dev/toolkits/byteforms) - Byteforms is an all-in-one platform for creating forms, managing submissions, and integrating data. It streamlines workflows by centralizing form data collection and automation.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and OpenRegister MCP?

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

### Can I use Tool Router MCP with ChatGPT Work?

Yes, you can. ChatGPT Work 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 OpenRegister tools.

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

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

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