GudCal

GudCal is an open-source, AI-native scheduling and booking platform designed for developers, teams, and AI agents.

With smart availability, event types, timezone-aware booking pages, and powerful APIs & webhooks, GudCal makes scheduling flexible and efficient. It includes a built-in Model Context Protocol server so AI assistants (like Claude or ChatGPT agents) can book, cancel, and query availability on your behalf — and integrates seamlessly with Google Calendar, video conferencing, payments, notifications, and more.

Available as a cloud-hosted service or self-hostable infrastructure, GudCal empowers you to own your calendar data while unlocking modern scheduling automation for people and machines alike.