Justin PoehneltWhen creating events in Google Calendar, many developers come across the error message: Calendar usage limits exceeded. This happens even when they are not exceeding the API quota.
Error - usage limits exceeded
The full error response is the following:
{
domain: 'usageLimits',
reason: 'quotaExceeded',
message: 'Calendar usage limits exceeded.'
}
The corresponding Calendar API request might look like the following:
POST https://www.googleapis.com/calendar/v3/calendars/primary/events
Authorization: Bearer [YOUR_ACCESS_TOKEN]
Accept: application/json
Content-Type: application/json
{
"attendees": [
{
"email": "foo@example.com"
},
{
"email": "bar@example.com"
}
],
"end": {
"date": "2024-01-02"
},
"start": {
"date": "2024-01-01"
},
"summary": "A Calendar Event"
}
Cause - spam prevention
The reason for this is to prevent spam and is triggered by the following:
- Sending notifications to attendees
- Including attendees that are external to the Google Workspace domain, e.g. inviting
someone@example.comfromsomeone@example.org.
Solution - remove attendees
The problem is only fixed by removing the attendees and using an alternative approach. In the case of external domains, and sending notifications, the following are some alternatives:
- Provide a template link for users to create an event in their Google Calendar.
- Use
.icsfiles to create events in any calendar application. - Use OAuth to modify the user’s calendar directly.
- Share a public Google Calendar and add events to it.
- Use the publish event feature in Google Calendar to embed HTML.
Google Calendar template links look like the following:
https://calendar.google.com/calendar/r/eventedit
?action=TEMPLATE
&dates=20230325T224500Z%2F20230326T001500Z
&stz=Europe/Brussels
&etz=Europe/Brussels
&details=EVENT_DESCRIPTION_HERE
&location=EVENT_LOCATION_HERE
&text=EVENT_TITLE_HERE
