curl --request POST \
  --url https://www.closient.com/products/api/v1/firmware \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "gtins": [
    "00850012345671"
  ],
  "url": "https://downloads.example.com/kettle/2.4.1.bin",
  "version": "2.4.1"
}
'

import requests

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

payload = {
    "gtins": ["00850012345671"],
    "url": "https://downloads.example.com/kettle/2.4.1.bin",
    "version": "2.4.1"
}
headers = {
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    gtins: ['00850012345671'],
    url: 'https://downloads.example.com/kettle/2.4.1.bin',
    version: '2.4.1'
  })
};

fetch('https://www.closient.com/products/api/v1/firmware', 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/firmware",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'gtins' => [
        '00850012345671'
    ],
    'url' => 'https://downloads.example.com/kettle/2.4.1.bin',
    'version' => '2.4.1'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "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/firmware"

	payload := strings.NewReader("{\n  \"gtins\": [\n    \"00850012345671\"\n  ],\n  \"url\": \"https://downloads.example.com/kettle/2.4.1.bin\",\n  \"version\": \"2.4.1\"\n}")

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

	req.Header.Add("X-API-Key", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	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/firmware")
  .header("X-API-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"gtins\": [\n    \"00850012345671\"\n  ],\n  \"url\": \"https://downloads.example.com/kettle/2.4.1.bin\",\n  \"version\": \"2.4.1\"\n}")
  .asString();

require 'uri'
require 'net/http'

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

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["Content-Type"] = 'application/json'
request.body = "{\n  \"gtins\": [\n    \"00850012345671\"\n  ],\n  \"url\": \"https://downloads.example.com/kettle/2.4.1.bin\",\n  \"version\": \"2.4.1\"\n}"

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

{
  "checksum_sha256": "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08",
  "created": "2026-09-30T09:00:00Z",
  "description": "Improves temperature stability.",
  "file_url": "",
  "id": "F5n5NdW6dTbvPYkgnLNjte",
  "is_latest": true,
  "is_stable": true,
  "maximum_hardware_version": "3.x",
  "minimum_hardware_version": "1.0",
  "modified": "2026-09-30T09:00:00Z",
  "products": [
    {
      "gtin": "00850012345671",
      "id": "SBjSX6xUJPPHQKUXBpYX2C",
      "product_name": "Acme Smart Kettle"
    }
  ],
  "release_date": "2026-09-01",
  "release_notes": "Fixes a boil-over bug.",
  "size_kb": 512,
  "title": "Acme Kettle firmware 2.4.1",
  "url": "https://downloads.example.com/kettle/2.4.1.bin",
  "version": "2.4.1"
}

{
  "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"
}