To use Cloud Key Management Service, you need to enable the Cloud Key Management Service API. This can be done in the Google Cloud Console.
To use Cloud KMS, you need to use it in a project with a billing account enabled.
Cloud KMS pricing is based on usage.
You can use Cloud KMS in any country where Google Cloud services are supported.
Restrictions with other Google Cloud services
The following topics provide information about restrictions when Cloud KMS is integrated with other Google Cloud services.