Freero for ChatGPT

io.github.antonber/freero

A collaborative whiteboard your AI assistant can read, fill and show live, with changes you review.

client:ChatGPT transport:streamable-http

Install Freero in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://freero.app/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs