Connecting ChatGPT

ChatGPT connects to the same MCP server as Claude. You will need a Formule account. The connection runs as you, so whatever you can see in the app is what ChatGPT will be able to see — no more.

Give ChatGPT this address. It must end in /mcp:

https://mcp.formule.io/mcp

What your ChatGPT plan allows

ChatGPT adds apps like this one through developer mode, which OpenAI is still rolling out:

ChatGPT plan	What works
Business, Enterprise, Edu	Everything, including changes such as adding a note (OpenAI still calls this a beta). On Business only admins and owners can add the app; on Enterprise and Edu an admin allows developer mode first.
Pro	Reading only: finding leads, opening a lead, searching listings.

OpenAI’s help article does not cover Plus; its developer guide lists developer mode for Plus accounts too, so check there. Developer-mode apps work only in ChatGPT on the web, not in ChatGPT’s phone or desktop apps.

ChatGPT's menus move

The steps below use the names in OpenAI’s own guide at the time of writing. If a menu does not match what you see, OpenAI keeps the current path in Developer mode and MCP apps in ChatGPT.

Adding Formule

Business

On ChatGPT Business only admins and owners can add an app, and each of them turns developer mode on for themselves.

1. In ChatGPT on the web, open Workspace settings → Apps → Create, and enable developer mode there if it is not on yet.

2. Name the app Formule and enter the server address:

   https://mcp.formule.io/mcp

3. Choose OAuth for authentication and press Scan Tools.

4. ChatGPT sends you to Formule. Sign in as yourself if you are not already, check the email address shown is yours, and press Approve.

5. When the scan has finished, press Create. The app is saved as a draft.

6. To give it to the rest of the workspace, open Workspace settings → Apps → Drafts and press Publish.

Each colleague then connects with their own Formule sign-in, so everyone sees only their own data.

Enterprise or Edu

1. A workspace admin grants developer mode, in Workspace settings → Permissions & Roles → Connected Data.

2. Turn it on for yourself in Settings → Apps → Advanced settings.

3. Open Settings → Apps → Create. Name the app Formule, enter https://mcp.formule.io/mcp, choose OAuth, and press Scan Tools.

4. ChatGPT sends you to Formule. Check the email address shown is yours and press Approve.

5. When the scan has finished, press Create.

An admin can then publish it for the workspace from Workspace settings → Apps → Drafts, and choose which of its actions it may take.

Pro

1. Turn developer mode on in your ChatGPT settings.

2. Create an app named Formule with the server address https://mcp.formule.io/mcp and OAuth authentication.

3. ChatGPT sends you to Formule. Check the email address shown is yours and press Approve.

On Pro, ChatGPT only lets the app read. It can find leads and listings and open a record, but a request to change something will not go through.

Using it

In a new chat, press + in the message box and choose Formule — if Developer mode is listed there, choose that first — or mention Formule in your message. The choice applies to that message; you do not need to pick it again to talk about what it has already found, only when a follow-up needs fresh data.

Ask something that proves it works:

Who am I in Formule?

You should get your own name, your role and your agency back. Then try:

What leads came in this week that nobody has called?

Which of my leads match the new two-bed in the centre?

Add a note to Adrian Keller: the viewing has moved to Saturday.

Before ChatGPT changes anything in Formule, it asks you to confirm and shows what it is about to send. Read it before you confirm. You can let ChatGPT remember your answer for that action for the rest of the chat.

Company knowledge and deep research

ChatGPT’s company knowledge only includes apps with tools named search and fetch, and Formule has both: they search your leads and your listing catalogue, and open a whole record. Deep research can use the app too, for reading only. Neither sees anything the rest of the tools do not.

When Formule adds a tool

A published workspace app keeps a snapshot of the tools it had when it was published. When Formule adds or changes a tool, an admin refreshes the app in Workspace settings → Apps to pick it up.

If it will not connect

ChatGPT shows no tools. Check the address ends in /mcp, exactly https://mcp.formule.io/mcp. It is the most common mistake.

You cannot find developer mode. On Business, only admins and owners have it. On Enterprise and Edu, an admin has to grant it to you first.

The approval screen never appears. Check you are signed into Formule in the same browser, and that pop-ups are allowed.

It worked, then stopped. ChatGPT’s permission has lapsed. Reconnect Formule from ChatGPT’s app settings and approve it again.

A tool returns nothing where the app shows data. That is usually correct behaviour, not a bug — the tool runs as you. As a real estate agent, you will not find another real estate agent’s leads.

Disconnecting

Remove the Formule app in ChatGPT’s app settings. Formule has no page listing connected apps, so that is where you disconnect it.

Prefer to stay in Formule?

Really, Formule’s own AI, does the same things inside the app, and asks before every change.