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

# Using ChatGPT

# Using ChatGPT with Marrow

Use ChatGPT when you want to query your synced Marrow store and ad data from a ChatGPT chat. ChatGPT connects to Marrow through a custom MCP app in **Developer mode**.

## Prerequisites

* At least one data source connected in [Integrations](../Marrow%20Basics/Features/Integrations.md) and syncing in [Data Explorer](../Marrow%20Basics/Features/Data%20Explorer.md)
* ChatGPT in a **web browser** (`chatgpt.com`) — not the mobile app for this setup
* A plan that supports Developer mode / custom MCP apps (for example Plus, Pro, Business, Enterprise, or Education)
* Workspace permission to create apps (Business/Enterprise often require an admin)

## Step 1: Copy the Marrow MCP URL

From **AI Hub → AI Platforms**, copy the MCP server URL:

`https://mcp.marrow.ai/mcp/v1`

Details: [AI Platforms](../Marrow%20Basics/Features/AI%20Platforms.md) · [MCP overview](./MCP.md)

## Step 2: Enable Developer mode

1. Go to [chatgpt.com](https://chatgpt.com).
2. Open **Settings → Security and login**.
3. Turn on **Developer mode**.

Developer mode is powerful. Read OpenAI’s warning before you continue. On managed workspaces, an admin may need to allow Developer mode first.

## Step 3: Create a Marrow app

1. Open **Settings → Plugins** (or go to `chatgpt.com/plugins`).
2. Select the **+** button to create a developer-mode app.
3. Set **Name** to `Marrow` (and add a short description if asked).
4. Under **Connection**, paste the MCP server URL from Step 1.
5. For **Authentication**, choose **OAuth** (or **Sign in**) when offered, then complete Marrow sign-in / approval.
6. Review the risk warning and create the app.

Created apps typically appear under **Drafts** until you publish (workspace policies vary).

## Step 4: Use Marrow in a chat

1. Start a new chat on `chatgpt.com`.
2. From the composer **+** / tools menu, choose **Developer mode** and enable the **Marrow** app.
3. Send a prompt that uses your data, for example:

```
Show me my Amazon Seller sales for the last 7 days.
```

If ChatGPT returns numbers from your synced accounts, the connection is working.

## Security

* Marrow is **read-only** — it never posts or changes store/ad settings.
* Access is scoped to the Marrow user who approved the connection.
* Remove or disable the app in ChatGPT settings, and revoke access from Marrow **AI Platforms**, if you need to cut off a client.

## Troubleshooting

### I cannot find Developer mode or Plugins

* Confirm you are on `chatgpt.com` in a browser.
* Confirm your plan and workspace role allow custom MCP apps.
* Ask a workspace admin if the toggle is missing.

### OAuth sign-in fails or loops

* Allow pop-ups for `chatgpt.com` and Marrow.
* Temporarily disable blockers that interfere with OAuth.
* Retry in a private window.

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

* Confirm the app finished creating and is selectable under Developer mode tools.
* On Business/Enterprise, confirm the app is published / allowed for your users if your workspace requires it.

## Related

* [MCP overview](./MCP.md)
* [AI Platforms](../Marrow%20Basics/Features/AI%20Platforms.md)
* [Skills](../Marrow%20Basics/Features/Skills.md)