curl --request GET \
  --url https://futures.kraken.com/derivatives/api/v3/tickers

{
  "result": "success",
  "tickers": [
    {
      "tag": "perpetual",
      "pair": "XBT:USD",
      "symbol": "PF_XBTUSD",
      "markPrice": 30209.9,
      "bid": 8634,
      "bidSize": 1000,
      "ask": 49289,
      "askSize": 139984,
      "vol24h": 15304,
      "volumeQuote": 7305.2,
      "openInterest": 149655,
      "open24h": 49289,
      "indexPrice": 21087.8,
      "last": 49289,
      "lastTime": "2022-06-17T10:46:35.705Z",
      "lastSize": 100,
      "suspended": false,
      "fundingRate": 1.18588737106e-7,
      "fundingRatePrediction": 1.1852486794e-7,
      "postOnly": false,
      "change24h": 1.9974017538161748
    },
    {
      "tag": "month",
      "pair": "XBT:USD",
      "symbol": "FI_XBTUSD_211231",
      "markPrice": 20478.5,
      "bid": 28002,
      "bidSize": 900,
      "vol24h": 100,
      "volumeQuote": 843.9,
      "openInterest": 10087,
      "open24h": 28002,
      "indexPrice": 21087.8,
      "last": 28002,
      "lastTime": "2022-06-17T10:45:57.177Z",
      "lastSize": 100,
      "suspended": false,
      "postOnly": false,
      "change24h": 1.9974017538161748
    },
    {
      "symbol": "in_xbtusd",
      "last": 21088,
      "lastTime": "2022-06-17T11:00:30.000Z"
    },
    {
      "symbol": "rr_xbtusd",
      "last": 20938,
      "lastTime": "2022-06-16T15:00:00.000Z"
    }
  ],
  "serverTime": "2022-06-17T11:00:31.335Z"
}