curl --request POST \
  --url https://rpc.quai.network/cyprus1/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "method": "quai_getHeaderByNumber",
  "params": [
    "0xD6DE"
  ],
  "id": 1
}
'

import requests

url = "https://rpc.quai.network/cyprus1/"

payload = {
    "jsonrpc": "2.0",
    "method": "quai_getHeaderByNumber",
    "params": ["0xD6DE"],
    "id": 1
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({jsonrpc: '2.0', method: 'quai_getHeaderByNumber', params: ['0xD6DE'], id: 1})
};

fetch('https://rpc.quai.network/cyprus1/', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://rpc.quai.network/cyprus1/",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'jsonrpc' => '2.0',
    'method' => 'quai_getHeaderByNumber',
    'params' => [
        '0xD6DE'
    ],
    'id' => 1
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://rpc.quai.network/cyprus1/"

	payload := strings.NewReader("{\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"quai_getHeaderByNumber\",\n  \"params\": [\n    \"0xD6DE\"\n  ],\n  \"id\": 1\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://rpc.quai.network/cyprus1/")
  .header("Content-Type", "application/json")
  .body("{\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"quai_getHeaderByNumber\",\n  \"params\": [\n    \"0xD6DE\"\n  ],\n  \"id\": 1\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://rpc.quai.network/cyprus1/")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"quai_getHeaderByNumber\",\n  \"params\": [\n    \"0xD6DE\"\n  ],\n  \"id\": 1\n}"

response = http.request(request)
puts response.read_body

{
  "jsonrpc": "2.0",
  "result": {
    "baseFeePerGas": "0xa410",
    "efficiencyScore": "0x1",
    "etxEligibleSlices": "0x0100000000000000000000000000000000000000000000000000000000000000",
    "etxRollupRoot": "0xb388088d2258438dff45de21427abe830b13b8c1e533f5a0e9a81a8d8e9913fc",
    "etxSetRoot": "0x223f55cafa1ba1b9b6bce93fd47914e79e3dcd73d580401c20e9a2a4966c1ee4",
    "evmRoot": "0xa2a4c58c572807cd5f65d744aa64425dbcc68f0186849434e69ffdccd6b9607b",
    "exchangeRate": "0x38d7ea4c68000",
    "expansionNumber": "0x0",
    "extraData": "0xd78776302e31392e3088676f312e32332e31856c696e7578",
    "gasLimit": "0x2625a00",
    "gasUsed": "0x2425e0",
    "interlinkRootHash": "0xd6c4c98f71601591ab7d2de87becd40bc6cc2a7e8121a8736b1a6ca1b02f90d8",
    "manifestHash": [
      "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
      "0x847c7ece49c07a0930955a99393eef02926f3b4504986f69e2a928e3218abbaf",
      "0x980e84749d3d805de6fcbaeb54502f21b34dcd9adc12caa8c762130cf1d5601c"
    ],
    "number": [
      "0x3",
      "0x6"
    ],
    "outboundEtxsRoot": "0x79709f3dc4fb0abb448b5510282ff03300bdc21f2643458f2be5278a8b14a6fb",
    "parentDeltaEntropy": [
      "0x0",
      "0x0",
      "0x6cd932130602527ba6"
    ],
    "parentEntropy": [
      "0x1bdf8a21057ebc05add",
      "0x1bdf8a21057ebc05add",
      "0x22b5c1a91498aa748b4"
    ],
    "parentHash": [
      "0xa85fd2206e4e6cefa52e4cdcc9703966b5ba2adbb653b7a03f35bbdb8bf15164",
      "0xa85fd2206e4e6cefa52e4cdcc9703966b5ba2adbb653b7a03f35bbdb8bf15164"
    ],
    "parentUncledDeltaEntropy": [
      "0x0",
      "0x0",
      "0x0"
    ],
    "primeTerminusHash": "0xa85fd2206e4e6cefa52e4cdcc9703966b5ba2adbb653b7a03f35bbdb8bf15164",
    "quaiStateSize": "0xad2d",
    "receiptsRoot": "0x28f04315a3c72cd71aad9c19d872fa1ce9da69c2f0b923777fbd7d4083bb8ad4",
    "secondaryCoinbase": "0x00A3E45AA16163F2663015B6695894D918866d19",
    "size": "0x2a8",
    "stateLimit": "0x2625a00",
    "stateUsed": "0x0",
    "thresholdCount": "0x0",
    "transactionsRoot": "0xea3b95e9dca1731c0224bab7c70a2b356f1f339b3d21bc93d42fb5918825e08d",
    "uncleHash": "0xaa7efa095d8a2395ca710cbd792b52705e75e89c97225426317c74503dcc893f",
    "uncledEntropy": "0x0",
    "utxoRoot": "0xabf4854703f6b830a729ee8f667c47e1de8380f79b645b84cd3930c76c13f5d9",
    "woHeader": {
      "difficulty": "0x6c4e7edba",
      "headerHash": "0xa2d7d51a17c5798441bb91c13db5ac4dc6e699d4b4908f48664a327fc734b216",
      "location": "0x0000",
      "lock": "0x1",
      "mixHash": "0x196b6d605784efcb60aae22923db8f52b54e3f12e19d69003028d2969df28247",
      "nonce": "0x8dcd00000035efd3",
      "number": "0x10",
      "parentHash": "0x8714e00f8e4775001dca3f2b9cd8c80d0e286d17a6a1f3b2216cdf6ea15e66ed",
      "primaryCoinbase": "0x0003e45Aa16163f2663015B6695894D918866D19",
      "primeTerminusNumber": "0x2",
      "timestamp": "0x66fd78bf",
      "txHash": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"
    }
  },
  "id": 1
}