curl --request GET \
  --url https://api.tickflow.org/v1/klines \
  --header 'x-api-key: <api-key>'

{
  "data": {
    "close": [
      123
    ],
    "high": [
      123
    ],
    "low": [
      123
    ],
    "open": [
      123
    ],
    "timestamp": [
      123
    ],
    "volume": [
      123
    ],
    "amount": [
      123
    ]
  }
}