Public Holidays & Business Days (200+ countries) for ChatGPT

io.github.pcp183/business-days

Public holidays and business-day math (add, count, check) for 200+ countries and regions. x402.

client:ChatGPT transport:streamable-http tools:1

Install Public Holidays & Business Days (200+ countries) in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://business-days-production.up.railway.app/mcp

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