## API enablement

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.

[Enable the API](https://console.cloud.google.com/apis/enableflow?apiid=cloudkms.googleapis.com)

<br />

## Billing account

To use Cloud KMS, you need to use it in a project with a
billing account enabled.

[Enable billing](https://support.google.com/cloud/answer/6293499#enable_billing_for_a_project)

<br />

[Cloud KMS pricing](https://cloud.google.com/kms/pricing) is based on usage.

## Supported countries

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.

- [Agent Registry](https://docs.cloud.google.com/agent-registry/skills-architecture.md.txt#cmek-limitations)
- [Backup and DR Service](https://docs.cloud.google.com/backup-disaster-recovery/docs/concepts/cmek.md.txt#limitations)
- [Backup for GKE](https://docs.cloud.google.com/kubernetes-engine/docs/add-on/backup-for-gke/concepts/about-cmek.md.txt#usage_considerations_and_limitations)
- [BigQuery](https://docs.cloud.google.com/bigquery/docs/customer-managed-encryption.md.txt#limitations)
- [Cloud Healthcare API](https://docs.cloud.google.com/healthcare-api/docs/cmek.md.txt#restrictions)
- [Cloud Storage](https://docs.cloud.google.com/storage/docs/encryption/customer-managed-keys.md.txt#restrictions)
- [Cloud Tasks](https://docs.cloud.google.com/tasks/docs/use-cmek.md.txt#limitations)
- [Colab Enterprise](https://docs.cloud.google.com/colab/docs/cmek.md.txt#restrictions)
- [Compute Engine](https://docs.cloud.google.com/compute/docs/disks/customer-managed-encryption.md.txt#limitations)
- [Conversational Analytics API](https://docs.cloud.google.com/gemini/data-agents/conversational-analytics-api/cmek.md.txt#limitations)
- [Dataform](https://docs.cloud.google.com/dataform/docs/cmek.md.txt#restrictions)
- [Firestore](https://docs.cloud.google.com/firestore/docs/cmek#cmek-protects)