To use Cloud KMS, you need to enable the Cloud KMS API. This can be done in the Google Cloud Platform 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 Platform services are supported.
Restrictions with other GCP services
The following topics provide information about restrictions when Cloud KMS is integrated with other GCP services.