curl --request GET \
  --url https://api.zenskar.com/invoices \
  --header 'apiversion: <api-key>' \
  --header 'organisation: <api-key>' \
  --header 'x-api-key: <api-key>'

import requests

url = "https://api.zenskar.com/invoices"

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

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

print(response.text)

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

fetch('https://api.zenskar.com/invoices', 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.zenskar.com/invoices",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "apiversion: <api-key>",
    "organisation: <api-key>",
    "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://api.zenskar.com/invoices"

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

	req.Header.Add("x-api-key", "<api-key>")
	req.Header.Add("organisation", "<api-key>")
	req.Header.Add("apiversion", "<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://api.zenskar.com/invoices")
  .header("x-api-key", "<api-key>")
  .header("organisation", "<api-key>")
  .header("apiversion", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.zenskar.com/invoices")

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

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

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

{
  "results": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "invoice_id": "<string>",
      "customer_id": "<string>",
      "contract_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "invoice_number": "<string>",
      "invoice_period": {
        "begin_date": "2023-11-07T05:31:56Z",
        "end_date_exclusive": "2023-11-07T05:31:56Z"
      },
      "status": "draft",
      "created_at": "2023-11-07T05:31:56Z",
      "created_by": "<string>",
      "last_updated_at": "2023-11-07T05:31:56Z",
      "invoice_total": 123,
      "net_invoice_total": 123,
      "applied_balance": 123,
      "invoice_url": "<string>",
      "external_id": "<string>",
      "payment_url": "<string>",
      "due_date": "2023-11-07T05:31:56Z",
      "promise_due_date": "2023-11-07T05:31:56Z",
      "amount_due": 123,
      "charged_at": "2023-11-07T05:31:56Z"
    }
  ],
  "next": "V2VsbCBhcmV1IGN1cmlvdxM=",
  "previous": "GmBsbCBhcmV1IGN1cmlvdxM=",
  "total_count": 123
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}