curl --request GET \
  --url https://controller.platform.simplecloud.app/v0/server-groups/rolling-restart \
  --header 'X-Network-ID: <x-network-id>' \
  --header 'X-Network-Secret: <x-network-secret>'

{
  "active": true,
  "group_id": "<string>",
  "max_concurrent": 123,
  "timestamp": "<string>"
}