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How to connect ChatGPT and Claude to the same data

Connect both to the same ADoor space over MCP. A list one assistant starts, the other can read and update, each with its own scoped access, so you stop re-explaining the same things in every chat.

Use cases All use cases

For builders

How to connect ChatGPT and Claude to the same data How to give an AI agent safe, scoped access to data A database for vibe-coded apps, with access built in

AI and engineering

Keep a daily work log Keep a prompt library for Claude, ChatGPT and Cursor Let agents build on each other’s findings Run a task queue for your agents Share agent traces across a team Share research notes Track eval results over time Start an experiment tracker Keep a model training log Keep feature flags and config agents can read Keep bug reproductions and test cases Record deploy and release history Keep an inventory of API keys and services Start a dataset registry Collect standup notes from assistants Keep an incident log Log benchmarks and latency measurements Track GPU and compute spend Start a labeling and annotation queue

Personal

Keep a side-project idea backlog Start a habit tracker Start a reading log Track what you’re learning Track subscriptions Start a budget tracker Start a movie and TV tracker Start a home inventory Keep a plant care log Keep a car maintenance log Plan your travel Keep a tasting journal Track a collection Keep notes on the people you know Track job applications Keep a vocabulary list Track important documents Keep a food log Start a training log Keep a log of your own numbers Keep a schedule of what is due and when to refill Start a recipe collection Keep a list of things to buy Share a pet care log Keep a daily journal Keep gift ideas and birthdays

Business

Track consulting time Track freelance clients and invoices Track fundraising Start a lightweight issue tracker Back an internal tool Store a customer-facing app’s data Plan a content calendar Collect customer feedback and feature requests Manage event attendees and sponsors Report from many sources Start a customer list Track sales deals Keep a customer support log Track hiring Start an employee directory and onboarding checklist Track inventory Track orders and suppliers Start an asset and equipment register Track partners and resellers Track contracts and renewal dates Keep a price list and build quotes

Collaborative

Split expenses Share a research reading list Plan an open-source project roadmap Build a shared world-building bible Plan a house renovation Start a shared household list Share a household chores rota Keep a family schedule Track kids’ activities Plan a trip with friends Plan a wedding or party Run a book club Run a sports team or club Run volunteer and community sign-ups Run a student group project Start a neighborhood tool-lending list Share a weekly meal plan Write babysitter and caregiver handover notes Plan a shift schedule Plan a carpool rota Share a packing list Coordinate help for a parent

Connect your assistant. ADoor opens in your browser, where you sign in or create your account, choose a space and approve.

MCP URL https://app.adoor.halmoslabs.com/mcp

  • Add to Cursor
  • Claude In Claude, open Settings, then Connectors, and choose Add custom connector. Paste the MCP URL and add it.
  • Claude Code claude mcp add --transport http adoor https://app.adoor.halmoslabs.com/mcp
  • ChatGPT On chatgpt.com, open Plugins, choose +, then Add custom MCP server. Paste the MCP URL, choose OAuth, and create it as a plugin.
  • Grok On grok.com, open Connectors, choose New Connector, then Custom. Paste the MCP URL.

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Can ChatGPT and Claude work together?

Not directly. ChatGPT and Claude each keep their own chats, projects and memory, and neither can read the other's. They can work from the same data: connect both to one ADoor space, and a list ChatGPT starts is there when you open Claude.

@ADoor Start a reading list for me: title, author, and whether I've read it.

ADoor Created Reading list in your space and added 3 entries

Reading list

TitleAuthorRead
PiranesiSusanna ClarkeYes
The OverstoryRichard PowersNo
KindredOctavia E. ButlerNo

That was ChatGPT. The next day, ask Claude “What's still unread on my reading list?” and it answers from the same list.

How to share data from ChatGPT to Claude

The MCP server is https://app.adoor.halmoslabs.com/mcp for both. Sign-in uses OAuth, so there is no key to paste.

  1. ChatGPT: Plugins, then Add custom MCP server. Choose OAuth.
  2. Claude: Customize, then Connectors, then add a custom connector. Keep OAuth.
  3. Each one opens ADoor in your browser. Sign in, choose the same space for both, and approve.
  4. Start a list in ChatGPT, and ask about it in Claude.

The connect guide has the details.

Add Cursor and Grok too

  • Grok: on grok.com, Connectors, then New Connector, then Custom, with the same URL.
  • Cursor: add ADoor under mcpServers in ~/.cursor/mcp.json with the same URL. An agent can then read the list while it works, or add to it.

Who can see what

  • Each assistant reaches only the space you chose when you connected it.
  • One assistant can read only. Give Cursor read access and ChatGPT read and add, for example.
  • People you share with connect their own assistants, with their own access.
  • The history shows which assistant changed what, and the before and after.

Questions people ask

Can ChatGPT and Claude work together?

Yes, through the same data. Connect both to one ADoor space over MCP, and a list ChatGPT starts is there when you open Claude, each with its own access.

How do I share data from ChatGPT to Claude?

Connect both to the same ADoor space over MCP, at https://app.adoor.halmoslabs.com/mcp. What ChatGPT writes to that space, Claude can read and update.

Can Claude use what I told ChatGPT?

Not on its own. ChatGPT's memory and chat history stay in ChatGPT, and Claude can't read them. What an assistant writes to your ADoor space, every assistant you connect to that space can read.

Do I have to set up the list in each assistant?

No. Set it up once in any assistant. The others find it in the same space.

Can I take an assistant's access back?

Yes, at any time in ADoor. It applies from its next request, and what it wrote stays.

Is it free?

A free workspace holds 1 space with 3 tables and 100 rows. Pro is $10 a month per workspace, with 1 GB of storage. See pricing.

How to start

  1. Sign in to ADoor.
  2. Connect ChatGPT and Claude to the same space.
  3. Start a list in one, and ask about it in the other.

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Updated October 20, 2026.

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