What is your goal?Is Make MCP Toolbox connection to ChatGPT available on the ChatGPT Plus plan?
I’m using ChatGPT Plus and Developer Mode. I created a custom MCP server using the Make MCP Toolbox URL and key with /stateless and also tested /stream, with No Auth, but ChatGPT returns: “MCP server refused access.”
Is this integration fully supported on ChatGPT Plus, or does it require Business, Enterprise, or Edu?
Hi @Tomek_K ! ChatGPT Plus is supported for this integration. Make MCP Toolboxes are available with all ChatGPT plans, including Free.
The “MCP server refused access” message usually means the toolbox key is missing or hasn’t been included correctly in the server URL. The key needs to be part of the complete URL:
<MCP toolbox URL>/t/<toolbox key>/stateless
To connect Make MCP Toolbox, select No Auth in ChatGPT. The /stateless transport is recommended, although /stream can also be used if needed.
This guide has the full setup: Connect Make MCP Toolboxes to ChatGPT.
Additionally, if you’d prefer to connect ChatGPT to your Make account beyond a specific MCP Toolbox, you can also use the standard Make MCP Server connection described in this guide: 📘 How to connect Make to ChatGPT and Codex in this guide. That connection is also available on all ChatGPT plans, including Free.
Hope that helps!
Happy automating, Valery from Make 
Thank you for your help Valery
