API Keys is currently free of charge. If you are using Cloud Endpoints to manage your API, you might incur charges at high traffic volumes. See the Endpoints pricing and quotas page for more information.
Calls to API Keys are subject to the following quotas:
|API call type||Limit|
|Read-only calls||240 API calls per minute.|
|Write calls||120 API calls per minute.|
To request an increase to these quotas:
- In the Google Cloud Console, go to the IAM & admin > Quotas page.
- Select the API Keys API quota that you want to increase: Read requests per minute and/or Write requests per minute.
- Click Edit Quotas.
- Fill out the form on the right side.
- Click Submit request.