curl --request GET \
  --url https://futures.kraken.com/derivatives/api/v3/trading/instruments \
  --header 'APIKey: <api-key>' \
  --header 'Authent: <api-key>'

import requests

url = "https://futures.kraken.com/derivatives/api/v3/trading/instruments"

headers = {
    "APIKey": "<api-key>",
    "Authent": "<api-key>"
}

response = requests.get(url, headers=headers)

print(response.text)

const options = {method: 'GET', headers: {APIKey: '<api-key>', Authent: '<api-key>'}};

fetch('https://futures.kraken.com/derivatives/api/v3/trading/instruments', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://futures.kraken.com/derivatives/api/v3/trading/instruments"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("APIKey", "<api-key>")
	req.Header.Add("Authent", "<api-key>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

{
  "instruments": [
    {
      "minimumTradeSize": 12.03532,
      "impactMidSize": 12.03532,
      "maxPositionSize": 12.03532,
      "openingDate": "2023-11-07T05:31:56Z",
      "symbol": "PF_BTCUSD",
      "pair": "BTC:USD",
      "base": "BTC",
      "quote": "USD",
      "tickSize": 12.03532,
      "type": "futures_inverse",
      "isin": "<string>",
      "contractValueTradePrecision": 123,
      "postOnly": true,
      "feeScheduleUid": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "rebateLevels": {},
      "mtf": true,
      "tradfi": true,
      "restricted": true,
      "isExpired": true,
      "fundingRateCoefficient": 12.03532,
      "lastTradingTime": "2023-11-07T05:31:56Z",
      "maxOpenInterestUsd": 12.03532,
      "marginLevels": [
        {
          "initialMargin": 12.03532,
          "maintenanceMargin": 12.03532,
          "contracts": 123,
          "numNonContractUnits": 12.03532
        }
      ],
      "maxRelativeFundingRate": 12.03532,
      "minRelativeFundingRate": 12.03532,
      "underlying": "<string>",
      "description": "<string>",
      "makerProtectionMillis": 123,
      "optionType": "call",
      "strikePrice": 12.03532,
      "underlyingFuture": "<string>"
    }
  ],
  "result": "success",
  "serverTime": "2020-08-27T17:03:33.196Z"
}