curl --request POST \
  --url https://api.altera.co/company/products \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "productId": 7638,
  "itemType": "PRODUCT",
  "productName": "Accurate made letter",
  "unit": "m2",
  "price": "98.00",
  "vatPerc": "23%",
  "pkwiu": "3.2.7",
  "gtu": "04",
  "category": 15465,
  "favourite": false,
  "enabled": false
}
'

import requests

url = "https://api.altera.co/company/products"

payload = {
    "productId": 7638,
    "itemType": "PRODUCT",
    "productName": "Accurate made letter",
    "unit": "m2",
    "price": "98.00",
    "vatPerc": "23%",
    "pkwiu": "3.2.7",
    "gtu": "04",
    "category": 15465,
    "favourite": False,
    "enabled": False
}
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    productId: 7638,
    itemType: 'PRODUCT',
    productName: 'Accurate made letter',
    unit: 'm2',
    price: '98.00',
    vatPerc: '23%',
    pkwiu: '3.2.7',
    gtu: '04',
    category: 15465,
    favourite: false,
    enabled: false
  })
};

fetch('https://api.altera.co/company/products', 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.altera.co/company/products",
  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([
    'productId' => 7638,
    'itemType' => 'PRODUCT',
    'productName' => 'Accurate made letter',
    'unit' => 'm2',
    'price' => '98.00',
    'vatPerc' => '23%',
    'pkwiu' => '3.2.7',
    'gtu' => '04',
    'category' => 15465,
    'favourite' => false,
    'enabled' => false
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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://api.altera.co/company/products"

	payload := strings.NewReader("{\n  \"productId\": 7638,\n  \"itemType\": \"PRODUCT\",\n  \"productName\": \"Accurate made letter\",\n  \"unit\": \"m2\",\n  \"price\": \"98.00\",\n  \"vatPerc\": \"23%\",\n  \"pkwiu\": \"3.2.7\",\n  \"gtu\": \"04\",\n  \"category\": 15465,\n  \"favourite\": false,\n  \"enabled\": false\n}")

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

	req.Header.Add("Authorization", "<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://api.altera.co/company/products")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"productId\": 7638,\n  \"itemType\": \"PRODUCT\",\n  \"productName\": \"Accurate made letter\",\n  \"unit\": \"m2\",\n  \"price\": \"98.00\",\n  \"vatPerc\": \"23%\",\n  \"pkwiu\": \"3.2.7\",\n  \"gtu\": \"04\",\n  \"category\": 15465,\n  \"favourite\": false,\n  \"enabled\": false\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.altera.co/company/products")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"productId\": 7638,\n  \"itemType\": \"PRODUCT\",\n  \"productName\": \"Accurate made letter\",\n  \"unit\": \"m2\",\n  \"price\": \"98.00\",\n  \"vatPerc\": \"23%\",\n  \"pkwiu\": \"3.2.7\",\n  \"gtu\": \"04\",\n  \"category\": 15465,\n  \"favourite\": false,\n  \"enabled\": false\n}"

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

{
  "result": "OK",
  "data": {
    "productId": 7638
  }
}