curl --request GET \
  --url https://scx-sbx.api.jtl-software.com/v1/seller/meta/{channel}/attributes \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://scx-sbx.api.jtl-software.com/v1/seller/meta/{channel}/attributes"

headers = {"Authorization": "Bearer <token>"}

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

print(response.text)

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://scx-sbx.api.jtl-software.com/v1/seller/meta/{channel}/attributes', 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://scx-sbx.api.jtl-software.com/v1/seller/meta/{channel}/attributes",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

$response = curl_exec($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://scx-sbx.api.jtl-software.com/v1/seller/meta/{channel}/attributes"

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

	req.Header.Add("Authorization", "Bearer <token>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://scx-sbx.api.jtl-software.com/v1/seller/meta/{channel}/attributes")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://scx-sbx.api.jtl-software.com/v1/seller/meta/{channel}/attributes")

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

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'

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

{
  "attributeList": [
    {
      "attributeId": "12323",
      "displayName": "Brand",
      "isMultipleAllowed": false,
      "type": "text",
      "values": [
        {
          "value": "Beer"
        },
        {
          "value": "Tee",
          "display": "Wine"
        }
      ],
      "attributeValueValidation": "/^[0-9]{13}$/",
      "conditionalMandatoryBy": [
        {
          "attributeId": "12323",
          "attributeValues": [
            "High"
          ]
        }
      ],
      "conditionalOptionalBy": [
        {
          "attributeId": "12323",
          "attributeValues": [
            "No Frame"
          ]
        }
      ],
      "required": true,
      "recommended": false,
      "section": "Colors and Appearance",
      "sectionPosition": 0,
      "isRepeatableSubSection": true,
      "subSection": "Length",
      "subSectionPosition": 0,
      "description": null,
      "isVariationDimension": true,
      "enumValues": [
        "Blue"
      ]
    }
  ]
}

{
  "errorList": [
    {
      "code": "GEN500",
      "message": "Internal Server Error",
      "severity": "error",
      "hint": null
    }
  ]
}