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How to integrate OpenRegister MCP with ChatGPT Work

Connect ChatGPT Work to OpenRegister MCP. Find ownership details for siemens ag, check insolvency records for wirecard ag, and more using natural language, with authentication handled for you.

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OpenRegister provides structured German register data for companies, people, ownership, finances, insolvency, documents, monitoring, and usage. Use it to access reliable business intelligence from German public-register sources in one place.

10 Tools

How to integrate OpenRegister MCP with ChatGPT Work

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

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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.

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, which is available on every plan.
  • Access to the OpenRegister workspace you want to connect.
  • Composio MCP.

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.

ChatGPT Work settings showing the Plugins page with the MCP tab selected

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
ChatGPT Work Add server dialog with the name Composio, type Streamable HTTP, and the Composio MCP URL

Then click Save. The Composio server now appears in your MCP plugins list.

ChatGPT Work Plugins page showing the Composio MCP server added to the list

3. Authenticate

Click Authenticate, log in via Composio, and click Allow access to authorize ChatGPT Work to use your Composio account.

Composio login and Allow access screen for ChatGPT Work MCP setup

4. Start using Composio

That is it - Composio tools are now available in ChatGPT Work. Ask it to work with your OpenRegister account and it will run the actions you authorize.

What you can do after connecting OpenRegister

  • Find ownership details for Siemens AG
  • Check insolvency records for Wirecard AG
  • Monitor new filings for Volkswagen AG

Security + privacy notes (important)

  • Use least-privilege access: Only grant permissions you actually need.
  • Review OAuth permissions before approving: Make sure requested scopes match what you expect Composio and ChatGPT Work to do.
  • Keep write actions human-reviewed: For actions like sending messages, creating labels, or editing drafts, keep manual confirmation enabled.
  • Be careful with sensitive data: Avoid using this setup with highly sensitive information unless allowed by your personal, company, or client policies.
TOOLS

Supported Tools

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

Get Company Data

Read one company profile, financials, historical ownership, holdings, current owners, or UBOs.

Get Credit Usage

Check the connected OpenRegister account's plan, included and used credits, remaining balance, overage, and reset time.

Get Document

Fetch an official Handelsregister document in real time for a company or retrieve a stored document by ID.

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.

Get Person Data

Read a person's profile and management positions or the companies in which they hold ownership stakes.

List Monitors

List every company and person monitor for the connected OpenRegister account, including disabled monitors.

Look Up Company by URL

Resolve a fully qualified company website URL to its OpenRegister company ID and available contact details.

Search Companies

Find companies by name or structured criteria.

Search Insolvencies

Search German insolvency proceedings by free text or structured debtor, proceeding, status, date, company, or person criteria.

Search People

Search natural persons by name, birth date, city, or active status.

FRAMEWORKS

How to build OpenRegister MCP Agent with another framework

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Claude Cowork

Use OpenRegister MCP with Claude Cowork

FAQ

Frequently asked questions

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.

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.

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.

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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