curl --request GET \
  --url https://api.example.com/api/v1/accounts/{accountId}/projects/{projectId}/kubernetes/{clusterId}/apps

{
  "installed_apps": [
    {
      "base": {
        "app_id": "<string>",
        "cluster_id": "<string>",
        "marketplace_app": {
          "app_name": "<string>",
          "display_name": "<string>",
          "description": "<string>",
          "icon_url": "<string>",
          "documentation_url": "<string>"
        }
      },
      "status": "INSTALLED_APP_STATUS_UNSPECIFIED"
    }
  ],
  "total_count": 123,
  "count": 123
}