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Connect ChatGPT

ChatGPT connects to custom MCP servers through developer mode, on ChatGPT for the web.

Checked against vendor docs 2026-09-28, not tested end-to-end

The steps below follow OpenAI's "ChatGPT Developer mode" guide. We have not yet completed a ChatGPT sign-in to NameBeta ourselves, so the OAuth step in particular is unverified: if ChatGPT reports an authentication error, write to contact@namebeta.com with the error and the time in UTC. ChatGPT's settings move often; if a label below no longer matches, search ChatGPT's settings for Developer mode.

Before you start​

  • A ChatGPT Plus, Pro, Business, Enterprise or Education account. In Business, Enterprise and Education workspaces, an admin may have to allow developer mode first.
  • A NameBeta account, or create one on the sign-in page during setup.

Add the server​

ChatGPT adds MCP servers as apps.

  1. Open Settings → Security and login and turn on Developer mode.
  2. Open Plugins in ChatGPT and click the + button. It creates developer-mode apps only once developer mode is on.
  3. Fill in the form:
    • Name: NameBeta
    • Description: for example, Domain availability, registrar prices, WHOIS and DNS lookups
    • MCP server URL: https://namebeta.com/api/mcp
    • Authentication: OAuth. Leave the client ID and secret empty; ChatGPT identifies itself with a Client ID Metadata Document.
  4. Create the app.

Sign in​

When ChatGPT sends you to the NameBeta sign-in page after you create the app, sign in and approve access.

The app now appears under Drafts in your app settings, where you can switch individual tools off or refresh the tool list.

Try it​

  1. In the message box, open the + menu and select Developer mode.
  2. Choose the NameBeta app for this conversation.
  3. Ask for what you need. Naming the tool makes ChatGPT pick it reliably:
Use NameBeta's compare_prices to compare prices for brewlab.info in EUR.

Disconnect or switch account​

  • To stop using NameBeta, delete the app under Drafts in your app settings.
  • To use a different NameBeta account, see Switch accounts.

If it does not connect​

If ChatGPT reports an authentication error, or keeps asking you to sign in, see Troubleshooting.

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