bug in API /api/v3/klines

hi guys when i call this API https://api.binance.com/api/v3/klines?symbol=BNBUSDT&interval=1m&limit=500
not return a Json format not have a curly brackets, is a bug or not?? thanks

The response is a json array consisting of klines represented also as json arrays. Curly brackets are only used for json objects.