Google Calendar API Push notifications: don’t call us, we’ll call you- Google Developers Blog
Jul 24, 2013

Summary
This post introduces push notifications for the Google Calendar API, enabling applications to receive real-time updates without the need for constant polling. This significantly improves efficiency and user experience by allowing developers to be notified of changes as they happen.
More from the Push Messaging for Web Apps and Extensions trail
- Web Notifications API Support Now Available in FCM Send v1 API- Google Developers Blog
- Time to Upgrade from GCM to FCM- Google Developers Blog
- Google Cloud Messaging and Firebase- Google Developers Blog
- Google Cloud Messaging: State of the Union- Google Developers Blog
- Google Cloud Messaging - We've Come a Long Way- Google Developers Blog