Custom connector guide

Add a custom connector in ChatGPT

ChatGPT calls a custom connector a custom MCP server. You add it once on chatgpt.com, and it works in the ChatGPT apps too. These steps use Humble as the example.

Before you start

You need the tool’s address

Each tool gives you its own connector address. It starts with https://. On chatgpt.com. Then use the tool in the ChatGPT apps too. For Humble, the address is:

https://my.humbleai.com/mcp
Steps

Add it in ChatGPT

  1. Step 1: Open Plugins

    In ChatGPT, open Plugins and select +.

  2. Step 2: Add a custom MCP server

    Select Add custom MCP server.

  3. Step 3: Name it and paste the address

    Type a name, such as Humble, and paste the tool’s address. For Humble, that is: https://my.humbleai.com/mcp

  4. Step 4: Choose OAuth, then Allow

    For sign-in, choose OAuth. Then sign in to the tool and select Allow. Some tools call it an unverified app, because they cannot check who made it. That is expected.

You need a paid ChatGPT plan. On some plans, turn on Developer mode in Settings first. On a Business or Enterprise plan, an admin may need to allow custom apps. ChatGPT asks you to confirm before it changes anything in the tool.

Steps last checked on 12 November 2026. Your app may look a little different.

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