LobbyStack for ChatGPT

io.github.lobbystack/lobbystack

AI receptionist: read calls, messages and contacts, book appointments, and update hours and FAQs.

client:ChatGPT transport:streamable-http

Install LobbyStack in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://app.lobbystack.com/api/mcp

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