curl --request POST \
  --url https://www.closient.com/products/api/v1/import/lots \
  --header 'Content-Type: multipart/form-data' \
  --header 'X-API-Key: <api-key>' \
  --form file=@example-file

import requests

url = "https://www.closient.com/products/api/v1/import/lots"

files = { "file": ("example-file", open("example-file", "rb")) }
headers = {"X-API-Key": "<api-key>"}

response = requests.post(url, files=files, headers=headers)

print(response.text)

const form = new FormData();
form.append('file', '<string>');

const options = {method: 'POST', headers: {'X-API-Key': '<api-key>'}};

options.body = form;

fetch('https://www.closient.com/products/api/v1/import/lots', 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://www.closient.com/products/api/v1/import/lots",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001--",
  CURLOPT_HTTPHEADER => [
    "Content-Type: multipart/form-data",
    "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"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://www.closient.com/products/api/v1/import/lots"

	payload := strings.NewReader("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001--")

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

	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.post("https://www.closient.com/products/api/v1/import/lots")
  .header("X-API-Key", "<api-key>")
  .body("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001--")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://www.closient.com/products/api/v1/import/lots")

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

request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<api-key>'
request.body = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001--"

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

{
  "created": 42,
  "error_count": 2,
  "errors": [
    {
      "column": "gtin",
      "line": 12,
      "message": "Invalid GTIN: must be 8, 12, 13, or 14 digits."
    },
    {
      "line": 37,
      "message": "Row is empty."
    }
  ],
  "skipped": 1,
  "total_rows": 50,
  "updated": 5
}

{
  "detail": "The requested resource was not found.",
  "error_code": "not_found",
  "retryable": false,
  "status": 404,
  "timestamp": "2026-03-31T12:00:00+00:00",
  "title": "Not Found",
  "type": "https://closient.com/docs/errors/not_found"
}

{
  "detail": "The requested resource was not found.",
  "error_code": "not_found",
  "retryable": false,
  "status": 404,
  "timestamp": "2026-03-31T12:00:00+00:00",
  "title": "Not Found",
  "type": "https://closient.com/docs/errors/not_found"
}

{
  "detail": "The requested resource was not found.",
  "error_code": "not_found",
  "retryable": false,
  "status": 404,
  "timestamp": "2026-03-31T12:00:00+00:00",
  "title": "Not Found",
  "type": "https://closient.com/docs/errors/not_found"
}

{
  "detail": "The requested resource was not found.",
  "error_code": "not_found",
  "retryable": false,
  "status": 404,
  "timestamp": "2026-03-31T12:00:00+00:00",
  "title": "Not Found",
  "type": "https://closient.com/docs/errors/not_found"
}

{
  "detail": "The requested resource was not found.",
  "error_code": "not_found",
  "retryable": false,
  "status": 404,
  "timestamp": "2026-03-31T12:00:00+00:00",
  "title": "Not Found",
  "type": "https://closient.com/docs/errors/not_found"
}

{
  "detail": "The requested resource was not found.",
  "error_code": "not_found",
  "retryable": false,
  "status": 404,
  "timestamp": "2026-03-31T12:00:00+00:00",
  "title": "Not Found",
  "type": "https://closient.com/docs/errors/not_found"
}

{
  "detail": "The requested resource was not found.",
  "error_code": "not_found",
  "retryable": false,
  "status": 404,
  "timestamp": "2026-03-31T12:00:00+00:00",
  "title": "Not Found",
  "type": "https://closient.com/docs/errors/not_found"
}