Start by setting up a new webhook.  Select the action that will trigger the webhook.  In this case lets trigger when an event is created.

Set the URL for the webhook to be local/email/email@xyz.com.

Now set the body to match the structure of an event invite:

{
"startTime": "{@event_date@}",
"endTime": "{@event_date_end@}",
"timezone": "{@event_timezone_id@}",
"location": "{@event_location@}",
"subject": "{@event_title@}",
"body": "{@event_summary@}"
}