curl --request GET \
  --url https://cloud-api.phala.com/api/v1/kms

{
  "items": [
    {
      "id": "<string>",
      "url": "<string>",
      "version": "<string>",
      "slug": "<string>",
      "chain_id": 123,
      "kms_contract_address": "<string>",
      "gateway_app_id": "<string>"
    }
  ],
  "total": 123,
  "page": 123,
  "page_size": 123,
  "pages": 123
}