Workday Calendar for ChatGPT

dev.workers.regnotes.workday-calendar/workday-calendar

Public holidays and business-day math (T+N, counts) for many countries; pay per call via x402

client:ChatGPT transport:streamable-http tools:4

Install Workday Calendar in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://workday-calendar.regnotes.workers.dev/mcp

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