Daily Limit For Unauthenticated Use Exceeded Google Api Calendar

I'm testing a sample code. It has always worked but suddenly i get: { 'error': { 'errors': [ { 'domain': 'usageLimits', 'reason': 'dailyLimitExceededUnreg', 'mess

Solution 1:

Even if you are not authenticating to Calendar as a user, you should create a client project and attach your key to requests so that Google has a project to "bill" the quota usage against. This will prevent these kind of issues in the future. See Google's help article but the general steps would be:

1) Create a Google API Project at https://console.developers.google.com. 2) Enable Calendar API for the project. 3) Get the API key under API Manager > Credentials. 4) Include the key as a parameter for all your Calendar API requests. E.g.

GET https://www.googleapis.com/calendar/v3/calendars/calendarId/events?key={your_key}

Solution 2:

Solved with "https://www.googleapis.com/auth/calendar.readonly" scope! It works again without any changes. Maybe it needs some time, but "https://www.googleapis.com/auth/calendar" still not working.