{ printf '%s' $'-----011000010111000001101001\r\nContent-Type: application/json\r\n\r\n{\n  "type": "INVOICE",\n  "sellerId": "4711",\n  "orderId": "43523-43432-43532",\n  "invoiceNumber": "<string>",\n  "transactionDate": "2023-11-07T05:31:56Z",\n  "taxCalculationDate": "2023-11-07T05:31:56Z",\n  "currency": "<string>",\n  "billingAddress": {\n    "lastName": "Nym",\n    "street": "Leyboldstrasse",\n    "city": "Hürth",\n    "country": "DE",\n    "firstName": "Arno",\n    "companyName": "<string>",\n    "houseNumber": "14a",\n    "addition": "1. UG",\n    "postcode": "50354",\n    "phone": "+49 0221 123456",\n    "state": "NRW"\n  },\n  "originalInvoiceNumber": "<string>",\n  "transactionDetails": "<string>",\n  "shipmentDate": "2023-11-07T05:31:56Z",\n  "exportOutsideEu": true,\n  "shipFromCountry": "PL",\n  "sellerVatNumber": "<string>",\n  "buyerVatNumber": "<string>",\n  "orderList": [\n    {\n      "orderId": "43523-43432-43532",\n      "purchasedAt": "2023-11-07T05:31:56Z",\n      "transactionItemList": [\n        {\n          "orderItemId": "<string>",\n          "totalGrossPriceWithDiscounts": 1,\n          "totalNetPriceWithDiscounts": 1,\n          "totalVatAmountWithDiscounts": 1,\n          "vatRate": 1,\n          "sku": "<string>",\n          "title": "<string>",\n          "quantity": 1,\n          "taxCategory": "INTRA_COMMUNITY_SUPPLY",\n          "discounts": [\n            {\n              "totalGrossPrice": 0,\n              "totalNetPrice": 0,\n              "totalVatAmount": 0,\n              "name": "10% Winter Sale",\n              "discountId": "D1265327",\n              "vatRate": 0\n            }\n          ]\n        }\n      ]\n    }\n  ]\n}\r\n-----011000010111000001101001\r\nContent-Type: application/pdf\r\nContent-Disposition: attachment; filename="example-file"\r\n\r\n'; cat -- example-file; printf '%s' $'\r\n-----011000010111000001101001--'; } | curl --request POST \
  --url https://scx-sbx.api.jtl-software.com/v1/channel/order/invoice \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/x-www-form-urlencoded; boundary=---011000010111000001101001' \
  --data-binary @-

import requests

url = "https://scx-sbx.api.jtl-software.com/v1/channel/order/invoice"

payload = b"".join([
    "-----011000010111000001101001\r\nContent-Type: application/json\r\n\r\n{\n  \"type\": \"INVOICE\",\n  \"sellerId\": \"4711\",\n  \"orderId\": \"43523-43432-43532\",\n  \"invoiceNumber\": \"<string>\",\n  \"transactionDate\": \"2023-11-07T05:31:56Z\",\n  \"taxCalculationDate\": \"2023-11-07T05:31:56Z\",\n  \"currency\": \"<string>\",\n  \"billingAddress\": {\n    \"lastName\": \"Nym\",\n    \"street\": \"Leyboldstrasse\",\n    \"city\": \"Hürth\",\n    \"country\": \"DE\",\n    \"firstName\": \"Arno\",\n    \"companyName\": \"<string>\",\n    \"houseNumber\": \"14a\",\n    \"addition\": \"1. UG\",\n    \"postcode\": \"50354\",\n    \"phone\": \"+49 0221 123456\",\n    \"state\": \"NRW\"\n  },\n  \"originalInvoiceNumber\": \"<string>\",\n  \"transactionDetails\": \"<string>\",\n  \"shipmentDate\": \"2023-11-07T05:31:56Z\",\n  \"exportOutsideEu\": true,\n  \"shipFromCountry\": \"PL\",\n  \"sellerVatNumber\": \"<string>\",\n  \"buyerVatNumber\": \"<string>\",\n  \"orderList\": [\n    {\n      \"orderId\": \"43523-43432-43532\",\n      \"purchasedAt\": \"2023-11-07T05:31:56Z\",\n      \"transactionItemList\": [\n        {\n          \"orderItemId\": \"<string>\",\n          \"totalGrossPriceWithDiscounts\": 1,\n          \"totalNetPriceWithDiscounts\": 1,\n          \"totalVatAmountWithDiscounts\": 1,\n          \"vatRate\": 1,\n          \"sku\": \"<string>\",\n          \"title\": \"<string>\",\n          \"quantity\": 1,\n          \"taxCategory\": \"INTRA_COMMUNITY_SUPPLY\",\n          \"discounts\": [\n            {\n              \"totalGrossPrice\": 0,\n              \"totalNetPrice\": 0,\n              \"totalVatAmount\": 0,\n              \"name\": \"10% Winter Sale\",\n              \"discountId\": \"D1265327\",\n              \"vatRate\": 0\n            }\n          ]\n        }\n      ]\n    }\n  ]\n}\r\n-----011000010111000001101001\r\nContent-Type: application/pdf\r\nContent-Disposition: attachment; filename=\"example-file\"\r\n\r\n".encode(),
    open("example-file", "rb").read(),
    "\r\n-----011000010111000001101001--".encode(),
])
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "multipart/x-www-form-urlencoded; boundary=---011000010111000001101001"
}

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

print(response.text)

const fileFor = (name) => {
  const input = document.querySelector(`input[type="file"][data-name="${CSS.escape(name)}"]`);
  if (!input?.files?.[0]) throw new Error(`Select a file for ${name}`);
  return input.files[0];
};
const framedBody = new Blob([
  "-----011000010111000001101001\r\nContent-Type: application/json\r\n\r\n{\n  \"type\": \"INVOICE\",\n  \"sellerId\": \"4711\",\n  \"orderId\": \"43523-43432-43532\",\n  \"invoiceNumber\": \"<string>\",\n  \"transactionDate\": \"2023-11-07T05:31:56Z\",\n  \"taxCalculationDate\": \"2023-11-07T05:31:56Z\",\n  \"currency\": \"<string>\",\n  \"billingAddress\": {\n    \"lastName\": \"Nym\",\n    \"street\": \"Leyboldstrasse\",\n    \"city\": \"Hürth\",\n    \"country\": \"DE\",\n    \"firstName\": \"Arno\",\n    \"companyName\": \"<string>\",\n    \"houseNumber\": \"14a\",\n    \"addition\": \"1. UG\",\n    \"postcode\": \"50354\",\n    \"phone\": \"+49 0221 123456\",\n    \"state\": \"NRW\"\n  },\n  \"originalInvoiceNumber\": \"<string>\",\n  \"transactionDetails\": \"<string>\",\n  \"shipmentDate\": \"2023-11-07T05:31:56Z\",\n  \"exportOutsideEu\": true,\n  \"shipFromCountry\": \"PL\",\n  \"sellerVatNumber\": \"<string>\",\n  \"buyerVatNumber\": \"<string>\",\n  \"orderList\": [\n    {\n      \"orderId\": \"43523-43432-43532\",\n      \"purchasedAt\": \"2023-11-07T05:31:56Z\",\n      \"transactionItemList\": [\n        {\n          \"orderItemId\": \"<string>\",\n          \"totalGrossPriceWithDiscounts\": 1,\n          \"totalNetPriceWithDiscounts\": 1,\n          \"totalVatAmountWithDiscounts\": 1,\n          \"vatRate\": 1,\n          \"sku\": \"<string>\",\n          \"title\": \"<string>\",\n          \"quantity\": 1,\n          \"taxCategory\": \"INTRA_COMMUNITY_SUPPLY\",\n          \"discounts\": [\n            {\n              \"totalGrossPrice\": 0,\n              \"totalNetPrice\": 0,\n              \"totalVatAmount\": 0,\n              \"name\": \"10% Winter Sale\",\n              \"discountId\": \"D1265327\",\n              \"vatRate\": 0\n            }\n          ]\n        }\n      ]\n    }\n  ]\n}\r\n-----011000010111000001101001\r\nContent-Type: application/pdf\r\nContent-Disposition: attachment; filename=\"example-file\"\r\n\r\n",
  fileFor("example-file"),
  "\r\n-----011000010111000001101001--",
]);

const options = {
  method: 'POST',
  headers: {
    Authorization: 'Bearer <token>',
    'Content-Type': 'multipart/x-www-form-urlencoded; boundary=---011000010111000001101001'
  },
  body: framedBody
};

fetch('https://scx-sbx.api.jtl-software.com/v1/channel/order/invoice', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

$file1 = file_get_contents("example-file");
if ($file1 === false) { throw new RuntimeException("unable to read example-file"); }
$payload = "-----011000010111000001101001\r\nContent-Type: application/json\r\n\r\n{\n  \"type\": \"INVOICE\",\n  \"sellerId\": \"4711\",\n  \"orderId\": \"43523-43432-43532\",\n  \"invoiceNumber\": \"<string>\",\n  \"transactionDate\": \"2023-11-07T05:31:56Z\",\n  \"taxCalculationDate\": \"2023-11-07T05:31:56Z\",\n  \"currency\": \"<string>\",\n  \"billingAddress\": {\n    \"lastName\": \"Nym\",\n    \"street\": \"Leyboldstrasse\",\n    \"city\": \"Hürth\",\n    \"country\": \"DE\",\n    \"firstName\": \"Arno\",\n    \"companyName\": \"<string>\",\n    \"houseNumber\": \"14a\",\n    \"addition\": \"1. UG\",\n    \"postcode\": \"50354\",\n    \"phone\": \"+49 0221 123456\",\n    \"state\": \"NRW\"\n  },\n  \"originalInvoiceNumber\": \"<string>\",\n  \"transactionDetails\": \"<string>\",\n  \"shipmentDate\": \"2023-11-07T05:31:56Z\",\n  \"exportOutsideEu\": true,\n  \"shipFromCountry\": \"PL\",\n  \"sellerVatNumber\": \"<string>\",\n  \"buyerVatNumber\": \"<string>\",\n  \"orderList\": [\n    {\n      \"orderId\": \"43523-43432-43532\",\n      \"purchasedAt\": \"2023-11-07T05:31:56Z\",\n      \"transactionItemList\": [\n        {\n          \"orderItemId\": \"<string>\",\n          \"totalGrossPriceWithDiscounts\": 1,\n          \"totalNetPriceWithDiscounts\": 1,\n          \"totalVatAmountWithDiscounts\": 1,\n          \"vatRate\": 1,\n          \"sku\": \"<string>\",\n          \"title\": \"<string>\",\n          \"quantity\": 1,\n          \"taxCategory\": \"INTRA_COMMUNITY_SUPPLY\",\n          \"discounts\": [\n            {\n              \"totalGrossPrice\": 0,\n              \"totalNetPrice\": 0,\n              \"totalVatAmount\": 0,\n              \"name\": \"10% Winter Sale\",\n              \"discountId\": \"D1265327\",\n              \"vatRate\": 0\n            }\n          ]\n        }\n      ]\n    }\n  ]\n}\r\n-----011000010111000001101001\r\nContent-Type: application/pdf\r\nContent-Disposition: attachment; filename=\"example-file\"\r\n\r\n" . $file1 . "\r\n-----011000010111000001101001--";

curl_setopt_array($curl, [
  CURLOPT_URL => "https://scx-sbx.api.jtl-software.com/v1/channel/order/invoice",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => $payload,
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: multipart/x-www-form-urlencoded; boundary=---011000010111000001101001"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://scx-sbx.api.jtl-software.com/v1/channel/order/invoice"

	var payload bytes.Buffer
	payload.WriteString("-----011000010111000001101001\r\nContent-Type: application/json\r\n\r\n{\n  \"type\": \"INVOICE\",\n  \"sellerId\": \"4711\",\n  \"orderId\": \"43523-43432-43532\",\n  \"invoiceNumber\": \"<string>\",\n  \"transactionDate\": \"2023-11-07T05:31:56Z\",\n  \"taxCalculationDate\": \"2023-11-07T05:31:56Z\",\n  \"currency\": \"<string>\",\n  \"billingAddress\": {\n    \"lastName\": \"Nym\",\n    \"street\": \"Leyboldstrasse\",\n    \"city\": \"Hürth\",\n    \"country\": \"DE\",\n    \"firstName\": \"Arno\",\n    \"companyName\": \"<string>\",\n    \"houseNumber\": \"14a\",\n    \"addition\": \"1. UG\",\n    \"postcode\": \"50354\",\n    \"phone\": \"+49 0221 123456\",\n    \"state\": \"NRW\"\n  },\n  \"originalInvoiceNumber\": \"<string>\",\n  \"transactionDetails\": \"<string>\",\n  \"shipmentDate\": \"2023-11-07T05:31:56Z\",\n  \"exportOutsideEu\": true,\n  \"shipFromCountry\": \"PL\",\n  \"sellerVatNumber\": \"<string>\",\n  \"buyerVatNumber\": \"<string>\",\n  \"orderList\": [\n    {\n      \"orderId\": \"43523-43432-43532\",\n      \"purchasedAt\": \"2023-11-07T05:31:56Z\",\n      \"transactionItemList\": [\n        {\n          \"orderItemId\": \"<string>\",\n          \"totalGrossPriceWithDiscounts\": 1,\n          \"totalNetPriceWithDiscounts\": 1,\n          \"totalVatAmountWithDiscounts\": 1,\n          \"vatRate\": 1,\n          \"sku\": \"<string>\",\n          \"title\": \"<string>\",\n          \"quantity\": 1,\n          \"taxCategory\": \"INTRA_COMMUNITY_SUPPLY\",\n          \"discounts\": [\n            {\n              \"totalGrossPrice\": 0,\n              \"totalNetPrice\": 0,\n              \"totalVatAmount\": 0,\n              \"name\": \"10% Winter Sale\",\n              \"discountId\": \"D1265327\",\n              \"vatRate\": 0\n            }\n          ]\n        }\n      ]\n    }\n  ]\n}\r\n-----011000010111000001101001\r\nContent-Type: application/pdf\r\nContent-Disposition: attachment; filename=\"example-file\"\r\n\r\n")
	file0, err := os.ReadFile("example-file")
	if err != nil {
		panic(err)
	}
	payload.Write(file0)
	payload.WriteString("\r\n-----011000010111000001101001--")

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

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "multipart/x-www-form-urlencoded; boundary=---011000010111000001101001")

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

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

	fmt.Println(string(body))

}

java.io.ByteArrayOutputStream payload = new java.io.ByteArrayOutputStream();
byte[] part0 = "-----011000010111000001101001\r\nContent-Type: application/json\r\n\r\n{\n  \"type\": \"INVOICE\",\n  \"sellerId\": \"4711\",\n  \"orderId\": \"43523-43432-43532\",\n  \"invoiceNumber\": \"<string>\",\n  \"transactionDate\": \"2023-11-07T05:31:56Z\",\n  \"taxCalculationDate\": \"2023-11-07T05:31:56Z\",\n  \"currency\": \"<string>\",\n  \"billingAddress\": {\n    \"lastName\": \"Nym\",\n    \"street\": \"Leyboldstrasse\",\n    \"city\": \"Hürth\",\n    \"country\": \"DE\",\n    \"firstName\": \"Arno\",\n    \"companyName\": \"<string>\",\n    \"houseNumber\": \"14a\",\n    \"addition\": \"1. UG\",\n    \"postcode\": \"50354\",\n    \"phone\": \"+49 0221 123456\",\n    \"state\": \"NRW\"\n  },\n  \"originalInvoiceNumber\": \"<string>\",\n  \"transactionDetails\": \"<string>\",\n  \"shipmentDate\": \"2023-11-07T05:31:56Z\",\n  \"exportOutsideEu\": true,\n  \"shipFromCountry\": \"PL\",\n  \"sellerVatNumber\": \"<string>\",\n  \"buyerVatNumber\": \"<string>\",\n  \"orderList\": [\n    {\n      \"orderId\": \"43523-43432-43532\",\n      \"purchasedAt\": \"2023-11-07T05:31:56Z\",\n      \"transactionItemList\": [\n        {\n          \"orderItemId\": \"<string>\",\n          \"totalGrossPriceWithDiscounts\": 1,\n          \"totalNetPriceWithDiscounts\": 1,\n          \"totalVatAmountWithDiscounts\": 1,\n          \"vatRate\": 1,\n          \"sku\": \"<string>\",\n          \"title\": \"<string>\",\n          \"quantity\": 1,\n          \"taxCategory\": \"INTRA_COMMUNITY_SUPPLY\",\n          \"discounts\": [\n            {\n              \"totalGrossPrice\": 0,\n              \"totalNetPrice\": 0,\n              \"totalVatAmount\": 0,\n              \"name\": \"10% Winter Sale\",\n              \"discountId\": \"D1265327\",\n              \"vatRate\": 0\n            }\n          ]\n        }\n      ]\n    }\n  ]\n}\r\n-----011000010111000001101001\r\nContent-Type: application/pdf\r\nContent-Disposition: attachment; filename=\"example-file\"\r\n\r\n".getBytes(java.nio.charset.StandardCharsets.UTF_8);
payload.write(part0, 0, part0.length);
byte[] part1 = java.nio.file.Files.readAllBytes(java.nio.file.Paths.get("example-file"));
payload.write(part1, 0, part1.length);
byte[] part2 = "\r\n-----011000010111000001101001--".getBytes(java.nio.charset.StandardCharsets.UTF_8);
payload.write(part2, 0, part2.length);

HttpResponse<String> response = Unirest.post("https://scx-sbx.api.jtl-software.com/v1/channel/order/invoice")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "multipart/x-www-form-urlencoded; boundary=---011000010111000001101001")
  .body(payload.toByteArray())
  .asString();

require 'uri'
require 'net/http'

url = URI("https://scx-sbx.api.jtl-software.com/v1/channel/order/invoice")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'multipart/x-www-form-urlencoded; boundary=---011000010111000001101001'
request.body = [
  "-----011000010111000001101001\r\nContent-Type: application/json\r\n\r\n{\n  \"type\": \"INVOICE\",\n  \"sellerId\": \"4711\",\n  \"orderId\": \"43523-43432-43532\",\n  \"invoiceNumber\": \"<string>\",\n  \"transactionDate\": \"2023-11-07T05:31:56Z\",\n  \"taxCalculationDate\": \"2023-11-07T05:31:56Z\",\n  \"currency\": \"<string>\",\n  \"billingAddress\": {\n    \"lastName\": \"Nym\",\n    \"street\": \"Leyboldstrasse\",\n    \"city\": \"Hürth\",\n    \"country\": \"DE\",\n    \"firstName\": \"Arno\",\n    \"companyName\": \"<string>\",\n    \"houseNumber\": \"14a\",\n    \"addition\": \"1. UG\",\n    \"postcode\": \"50354\",\n    \"phone\": \"+49 0221 123456\",\n    \"state\": \"NRW\"\n  },\n  \"originalInvoiceNumber\": \"<string>\",\n  \"transactionDetails\": \"<string>\",\n  \"shipmentDate\": \"2023-11-07T05:31:56Z\",\n  \"exportOutsideEu\": true,\n  \"shipFromCountry\": \"PL\",\n  \"sellerVatNumber\": \"<string>\",\n  \"buyerVatNumber\": \"<string>\",\n  \"orderList\": [\n    {\n      \"orderId\": \"43523-43432-43532\",\n      \"purchasedAt\": \"2023-11-07T05:31:56Z\",\n      \"transactionItemList\": [\n        {\n          \"orderItemId\": \"<string>\",\n          \"totalGrossPriceWithDiscounts\": 1,\n          \"totalNetPriceWithDiscounts\": 1,\n          \"totalVatAmountWithDiscounts\": 1,\n          \"vatRate\": 1,\n          \"sku\": \"<string>\",\n          \"title\": \"<string>\",\n          \"quantity\": 1,\n          \"taxCategory\": \"INTRA_COMMUNITY_SUPPLY\",\n          \"discounts\": [\n            {\n              \"totalGrossPrice\": 0,\n              \"totalNetPrice\": 0,\n              \"totalVatAmount\": 0,\n              \"name\": \"10% Winter Sale\",\n              \"discountId\": \"D1265327\",\n              \"vatRate\": 0\n            }\n          ]\n        }\n      ]\n    }\n  ]\n}\r\n-----011000010111000001101001\r\nContent-Type: application/pdf\r\nContent-Disposition: attachment; filename=\"example-file\"\r\n\r\n",
  File.binread("example-file"),
  "\r\n-----011000010111000001101001--",
].map(&:b).join

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

{
  "errorList": [
    {
      "code": "VAL100",
      "message": "Required field sellerId not found",
      "severity": "error",
      "hint": "Check the field `sellerId` — it must be a non-empty string."
    }
  ]
}

{
  "errorList": [
    {
      "code": "GEN404",
      "message": "Not found",
      "severity": "error",
      "hint": null
    }
  ]
}

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