curl --request GET \
  --url https://v2.55-tech.com/markets \
  --header 'x-api-key: <api-key>'

import requests

url = "https://v2.55-tech.com/markets"

headers = {"x-api-key": "<api-key>"}

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

print(response.text)

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

fetch('https://v2.55-tech.com/markets', 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://v2.55-tech.com/markets",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "x-api-key: <api-key>"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://v2.55-tech.com/markets"

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

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

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://v2.55-tech.com/markets")
  .header("x-api-key", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://v2.55-tech.com/markets")

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

request = Net::HTTP::Get.new(url)
request["x-api-key"] = '<api-key>'

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

[
  {
    "marketId": 101,
    "marketLength": 3,
    "sportId": 10,
    "playerProp": false,
    "handicap": 0,
    "marketName": "Full Time Result",
    "marketNameShort": "1X2",
    "marketType": "1x2",
    "period": "fulltime",
    "oddsTypes": [
      {
        "outcomeId": 101,
        "outcomeName": "1"
      },
      {
        "outcomeId": 102,
        "outcomeName": "X"
      },
      {
        "outcomeId": 103,
        "outcomeName": "2"
      }
    ]
  },
  {
    "marketId": 201,
    "marketLength": 2,
    "sportId": 10,
    "playerProp": false,
    "handicap": -1.5,
    "marketName": "Asian Handicap -1.5",
    "marketNameShort": "AH -1.5",
    "marketType": "asian_handicap",
    "period": "fulltime",
    "oddsTypes": [
      {
        "outcomeId": 201,
        "outcomeName": "1"
      },
      {
        "outcomeId": 202,
        "outcomeName": "2"
      }
    ]
  }
]