The price for Cloud Endpoints depends on the number of calls to your API, as described in the following table:
|API calls per month per billing account||Cost per million API calls|
If you pay in a currency other than USD, the prices listed in your currency on Cloud Platform SKUs apply.
Endpoints charges by its calls to Service Control. Each API call processed by the Extensible Service Proxy (ESP) or the Cloud Endpoints Frameworks are reported as a tracked operation by the Service Control API and is listed as line item for Service Control on your bill.