Business Days and Holidays for ChatGPT

app.openkrill/business-days

Count working days between two dates, add business days to a date, or list public holidays.

client:ChatGPT transport:streamable-http tools:6

Install Business Days and Holidays in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://businessdays.openkrill.app/mcp

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