curl --request GET \
  --url https://api.maesn.dev/accounting/customers \
  --header 'X-ACCOUNT-KEY: <x-account-key>' \
  --header 'X-API-KEY: <x-api-key>'

import requests

url = "https://api.maesn.dev/accounting/customers"

headers = {
    "X-API-KEY": "<x-api-key>",
    "X-ACCOUNT-KEY": "<x-account-key>"
}

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

print(response.text)

const options = {
  method: 'GET',
  headers: {'X-API-KEY': '<x-api-key>', 'X-ACCOUNT-KEY': '<x-account-key>'}
};

fetch('https://api.maesn.dev/accounting/customers', 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://api.maesn.dev/accounting/customers",
  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-ACCOUNT-KEY: <x-account-key>",
    "X-API-KEY: <x-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://api.maesn.dev/accounting/customers"

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

	req.Header.Add("X-API-KEY", "<x-api-key>")
	req.Header.Add("X-ACCOUNT-KEY", "<x-account-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://api.maesn.dev/accounting/customers")
  .header("X-API-KEY", "<x-api-key>")
  .header("X-ACCOUNT-KEY", "<x-account-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.maesn.dev/accounting/customers")

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

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

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

{
  "meta": {
    "warnings": [
      "Field not used by target system"
    ],
    "pagination": {
      "total": 125,
      "perPage": 50,
      "currentPage": 1,
      "totalPages": 3
    }
  },
  "data": [
    {
      "id": "92c4f3a2-5b8e-4d1b-8a0c-9f6e7d2f3e4b",
      "addresses": [
        {
          "addressLine1": "Lucky street 1",
          "addressLine2": "2nd floor",
          "city": "Berlin",
          "countryCode": "DE",
          "postalCode": "10243",
          "type": "BILLING"
        }
      ],
      "companyName": "maesn",
      "contactType": "CONTACT_PERSON",
      "contactPersons": [
        {
          "emailAddresses": [
            {
              "email": "john.doe@company.com",
              "type": "BUSINESS"
            }
          ],
          "firstName": "John",
          "lastName": "Doe",
          "phoneNumbers": [
            {
              "number": "+49 7163307056",
              "type": "MOBILE"
            }
          ],
          "salutation": "Mr"
        }
      ],
      "documentId": "Z1248601M",
      "emailAddresses": [
        {
          "email": "john.doe@company.com",
          "type": "BUSINESS"
        }
      ],
      "number": "1042",
      "phoneNumbers": [
        {
          "number": "+49 7163307056",
          "type": "MOBILE"
        }
      ],
      "projectId": "3",
      "updatedDate": "2018-01-01T13:00:00.000Z",
      "vatId": "DE123456789"
    }
  ]
}