WorkdayAPI for ChatGPT

dev.workers.mike-tusa.workdayapi/workdayapi

Business-day and public-holiday math for 29 countries: add business days, days between, holidays.

client:ChatGPT transport:streamable-http tools:5

Install WorkdayAPI in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://workdayapi.mike-tusa.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