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# Connect ChatGPT via remote MCP

[Neotoma with ChatGPT](/neotoma-with-chatgpt) · Connect ChatGPT via remote MCP tunnel, developer mode, and Neotoma MCP server URL.

Looking for custom GPT with OpenAPI instead? See [Connect via custom GPT with OpenAPI](/neotoma-with-chatgpt-connect-custom-gpt).

## Setup

ChatGPT connects to MCP servers over the network via [developer mode](https://help.openai.com/en/articles/12584461). To configure remote access:

1.  **Start Neotoma with a tunnel:** follow the [tunnel guide](/tunnel) to expose your local Neotoma instance over HTTPS. The quickest path:
    
    Code snippet
    
    Copy the exact snippet shown below.
    
    ```
    neotoma api start --env prod --tunnel
    ```
    
    Your Neotoma API host
    
    https://
    
    Optional. Enter host only; URLs below use `https://` + this host.
    
2.  **Enable developer mode** in ChatGPT, then go to [Settings → Apps → Advanced settings → Developer mode](https://help.openai.com/en/articles/12584461). On Business plans only admins/owners can enable it; you can also enable it when creating an app via Workspace settings → Apps → Create.
3.  **Add Neotoma as a remote MCP server** in ChatGPT's developer mode settings, add your tunnel URL (e.g. `https://<tunnel-host>/mcp`). ChatGPT authenticates via OAuth; the Neotoma API supports the [MCP OAuth authorization flow](https://modelcontextprotocol.io/specification/2025-03-26/basic/authorization).

[Back to Neotoma with ChatGPT](/neotoma-with-chatgpt) · [Install guide](/install) · [MCP reference](/mcp)