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Use ChatGPT with Marrow MCP

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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.

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Step 1: Copy the MCP server URL

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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.

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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.

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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.

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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:

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

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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 and remove or unpublish the app in your ChatGPT workspace settings.

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Troubleshooting

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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.

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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.

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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.

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Marrow MCP resources

• MCP server URL: https://mcp.marrow.com/mcp/v1
• Interactive Data Scheme
• Data Scheme JSON: https://api.marrow.com/api/v1/spec/data-scheme
• Need help? Use the contact form