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ChatGPT supports MCP servers as Custom Connectors behind Developer Mode.
Custom Connectors require ChatGPT Plus, Pro, Business, Enterprise, or Edu.

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Setup

1

Enable Developer Mode

Open ChatGPT → Settings → Apps & Connectors → Advanced, and toggle Developer Mode on. You only need to do this once per account.
2

Create the connector

Still under Apps & Connectors, click Create (or Add custom connector). Fill in:
  • Name: Qonto
  • MCP server URL: 
    https://mcp.qonto.com/mcp
  • Authentication: OAuth (ChatGPT detects this automatically from the server’s metadata).
3

Authorize Qonto

ChatGPT opens an OAuth window. Sign in to Qonto, choose the organization to connect, and consent. On success the connector appears in your list with Connected status.
4

Use it in chat

Start a new conversation, open the connector picker in the composer, and enable Qonto. Then ask:
Pull my unpaid client invoices for this quarter.
ChatGPT calls list_client_invoices through the connector and returns the data.
You can jump straight to the connector page: chatgpt.com#settings/Connectors.

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Notes

  • ChatGPT does not yet support a one-click install deeplink for custom connectors, so the URL has to be pasted by hand.
  • Connectors are configured at the account level, they are available across web, desktop, and mobile.
  • The connector picker in the composer must be open in each chat where you want Qonto to be available.

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Removing the connector

Open Settings → Apps & Connectors, click the Qonto entry, and Delete. To also revoke Qonto’s side of the consent, do it from the connected apps section of your Qonto account.