Whenna for ChatGPT

com.whenna/whenna

Group scheduling: create a plan link, mark availability, get best times, lock the final time.

client:ChatGPT transport:streamable-http tools:7

Install Whenna in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://whenna.com/mcp

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