I was investigating an issue with Google Calendar recently and needed to get specific info about a Calendar event, such as the Event and Calendar IDs. In the past I've used Chrome Developer tools to investigate the specific event and get this information, but I've recently learnt of a much easier way to obtain this info.

If you access Google Calendar via the following link:

http://www.google.com/calendar/render?gessionid=OK&eventdeb=1

An additional 'Troubleshooting info' option appears in the kebab menu of a particular event:

Which contains debug info you can use to investigate further using the Security Investigation tool in Google Workspace: