curl --request GET \
  --url https://drb.coinbase.com/api/v2/public/ticker \
  --header 'Content-Type: application/json' \
  --data '
{
  "id": 8106,
  "jsonrpc": "2.0",
  "method": "public/ticker",
  "params": {
    "instrument_name": "BTC-PERPETUAL"
  }
}
'

{
  "id": 8106,
  "jsonrpc": "2.0",
  "result": {
    "best_ask_amount": 53040,
    "best_ask_price": 36290,
    "best_bid_amount": 4600,
    "best_bid_price": 36289.5,
    "current_funding": 0,
    "estimated_delivery_price": 36297.02,
    "funding_8h": 0.00002203,
    "index_price": 36297.02,
    "instrument_name": "BTC-PERPETUAL",
    "interest_value": 1.7362511643080387,
    "last_price": 36289.5,
    "mark_price": 36288.31,
    "max_price": 36833.4,
    "min_price": 35744.73,
    "open_interest": 502231260,
    "settlement_price": 36169.49,
    "state": "open",
    "stats": {
      "high": 36824.5,
      "low": 35213.5,
      "price_change": 0.2362,
      "volume": 7831.26548117,
      "volume_usd": 282615600
    },
    "timestamp": 1623059681955
  }
}