> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hologrow.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Use ChatGPT with Marrow MCP

# Use ChatGPT with Marrow MCP

This guide shows you how to connect **Marrow MCP** to **ChatGPT** as a custom connector, so you can query your Marrow workspace from ChatGPT.

<img src="https://mintlify.s3.us-west-1.amazonaws.com/hologrowinc/hub-files/mcp/marrow/chatgpt-connector.png" alt="ChatGPT connector setup steps" />

## Before you start

* Use **ChatGPT in a web browser**, not the desktop or mobile apps.
* Use a ChatGPT plan that supports Apps and connectors, such as **Pro**, **Plus**, **Business** or **Enterprise**.
* Be a **workspace admin** in ChatGPT to create and publish the app in your workspace.

> During setup, ChatGPT redirects you to Marrow so you can sign in and approve access.

## Step 1: Copy the MCP server URL

Copy this URL: `https://mcp.marrow.com/mcp/v1`.

## Step 2: Enable ChatGPT Developer mode

1. Go to `chatgpt.com`.
2. Enable Developer mode: **Settings** → **Apps** → **Advanced settings** → **Developer mode**.
3. Developer mode adds risk to your account. Read the warning before you continue.

## Step 3: Create the Marrow app in your ChatGPT workspace

1. Open **Workspace settings** → **Apps** → **Create**.
2. Set **Name** to `Marrow`.
3. In **MCP Server URL**, paste the URL from Step 1.
4. In **Authentication**, select **OAuth** (or **Sign in**) and complete the Marrow sign-in.
5. Read the risk warning and approve it if you agree.
6. Select **Create** and wait for the app to be created.

## Step 4: Publish the app

1. When your app appears in the list, select **Publish**.
2. Read the risk warnings and approve them if you agree.
3. Select **Publish**.

## Step 5: Test the connection

1. Go back to `chatgpt.com` and start a new chat.
2. Select **Thinking** mode and add the **Marrow** app to the chat.
3. Send a prompt that uses Marrow data, for example:

```text theme={null}
Show me my Amazon Seller Central sales for the last 7 days.
```

If ChatGPT returns Marrow data, the connection is working.

## Security

* ChatGPT uses an OAuth-style sign-in and approval flow to access Marrow.
* Access is scoped to the permissions of the Marrow user who approved the connection.
* To revoke access, go to [Marrow MCP Integrations](https://app.marrow.com/integrations/mcp) and remove or unpublish the app in your ChatGPT workspace settings.

## Troubleshooting

### I cannot find Developer mode or Apps in settings

* Confirm you are using `chatgpt.com` in a browser.
* Confirm you are on a plan that supports Apps and connectors.
* Confirm you are a ChatGPT workspace admin. Business and Enterprise workspaces can restrict this to admins.

### OAuth sign-in fails or keeps redirecting

* Allow pop-ups and redirects for `chatgpt.com` and Marrow.
* Temporarily disable ad or tracking blockers that might interfere with OAuth flows.
* Try a private browsing window to rule out extension issues.

### I created the app but cannot add it to a chat

* Make sure the app is **Published** (creation alone is not enough).
* If you are in a managed workspace, confirm that Apps are allowed for your users.

***

## Marrow MCP resources

Check the following resources for more information:

* MCP server URL: `https://mcp.marrow.com/mcp/v1`
* [Interactive Data Scheme](/hub/data-scheme)
* Data Scheme JSON: [https://api.marrow.com/api/v1/spec/data-scheme](https://api.marrow.com/api/v1/spec/data-scheme)
* Need help? Use the [contact form](https://forms.clickup.com/9015200219/f/8cnj2ev-38615/AOYF9I35QFOXWJQXIG?type=Form\&source=hub-mcp-chatgpt-docs)