curl --request POST \
  --url https://thirdparty.qonto.com/v2/products \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "title": "Web Development Service",
  "type": "service",
  "unit_price": {
    "value": "150.00",
    "currency": "EUR"
  },
  "vat_rate": "0.2",
  "description": "Full-stack web development service",
  "internal_note": "Preferred vendor for web projects",
  "unit": "hour",
  "vat_exemption_code": "N1",
  "links": [
    {
      "title": "Product page",
      "url": "https://www.example.com/product"
    }
  ]
}
'

import requests

url = "https://thirdparty.qonto.com/v2/products"

payload = {
    "title": "Web Development Service",
    "type": "service",
    "unit_price": {
        "value": "150.00",
        "currency": "EUR"
    },
    "vat_rate": "0.2",
    "description": "Full-stack web development service",
    "internal_note": "Preferred vendor for web projects",
    "unit": "hour",
    "vat_exemption_code": "N1",
    "links": [
        {
            "title": "Product page",
            "url": "https://www.example.com/product"
        }
    ]
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    title: 'Web Development Service',
    type: 'service',
    unit_price: {value: '150.00', currency: 'EUR'},
    vat_rate: '0.2',
    description: 'Full-stack web development service',
    internal_note: 'Preferred vendor for web projects',
    unit: 'hour',
    vat_exemption_code: 'N1',
    links: [{title: 'Product page', url: 'https://www.example.com/product'}]
  })
};

fetch('https://thirdparty.qonto.com/v2/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://thirdparty.qonto.com/v2/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([
    'title' => 'Web Development Service',
    'type' => 'service',
    'unit_price' => [
        'value' => '150.00',
        'currency' => 'EUR'
    ],
    'vat_rate' => '0.2',
    'description' => 'Full-stack web development service',
    'internal_note' => 'Preferred vendor for web projects',
    'unit' => 'hour',
    'vat_exemption_code' => 'N1',
    'links' => [
        [
                'title' => 'Product page',
                'url' => 'https://www.example.com/product'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "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://thirdparty.qonto.com/v2/products"

	payload := strings.NewReader("{\n  \"title\": \"Web Development Service\",\n  \"type\": \"service\",\n  \"unit_price\": {\n    \"value\": \"150.00\",\n    \"currency\": \"EUR\"\n  },\n  \"vat_rate\": \"0.2\",\n  \"description\": \"Full-stack web development service\",\n  \"internal_note\": \"Preferred vendor for web projects\",\n  \"unit\": \"hour\",\n  \"vat_exemption_code\": \"N1\",\n  \"links\": [\n    {\n      \"title\": \"Product page\",\n      \"url\": \"https://www.example.com/product\"\n    }\n  ]\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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://thirdparty.qonto.com/v2/products")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"title\": \"Web Development Service\",\n  \"type\": \"service\",\n  \"unit_price\": {\n    \"value\": \"150.00\",\n    \"currency\": \"EUR\"\n  },\n  \"vat_rate\": \"0.2\",\n  \"description\": \"Full-stack web development service\",\n  \"internal_note\": \"Preferred vendor for web projects\",\n  \"unit\": \"hour\",\n  \"vat_exemption_code\": \"N1\",\n  \"links\": [\n    {\n      \"title\": \"Product page\",\n      \"url\": \"https://www.example.com/product\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://thirdparty.qonto.com/v2/products")

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"] = 'application/json'
request.body = "{\n  \"title\": \"Web Development Service\",\n  \"type\": \"service\",\n  \"unit_price\": {\n    \"value\": \"150.00\",\n    \"currency\": \"EUR\"\n  },\n  \"vat_rate\": \"0.2\",\n  \"description\": \"Full-stack web development service\",\n  \"internal_note\": \"Preferred vendor for web projects\",\n  \"unit\": \"hour\",\n  \"vat_exemption_code\": \"N1\",\n  \"links\": [\n    {\n      \"title\": \"Product page\",\n      \"url\": \"https://www.example.com/product\"\n    }\n  ]\n}"

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