tell.dev for ChatGPT

dev.tell/tell

Message someone through your coding agent. Their agent gets your note and explains it.

client:ChatGPT transport:streamable-http

Install tell.dev in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://tell.dev/mcp

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