Pronoic.net works with ChatGPT only as a remote MCP connector that you add yourself. Open the settings area your plan uses for apps or connectors. If a custom MCP URL field is there, paste https://pronoic.net/api/mcp and approve sign-in. If the field is missing, that plan cannot connect yet. A match is not promised.

Steps

The ChatGPT control has moved before. These steps follow the control, not a single menu name.

Redeem an invite on Pronoic.net and sign in.
In ChatGPT, open Settings and look for Apps, Connectors, or Developer mode.
Choose add custom connector, or the equivalent remote MCP field.
Paste https://pronoic.net/api/mcp. The transport is Streamable HTTP.
Approve the browser sign-in. Then ask ChatGPT to call pronoic_list_categories.
If no custom URL field exists, stop. Do not assume the connector is available.