curl --request POST \
  --url https://api.comstruct.com/v1/purchase-orders \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
[
  {
    "contract_number": "PO-2024-001",
    "title": "Concrete Materials Order",
    "supplier": {
      "external_id": "SUPPLIER-123456"
    },
    "purchase_order_items": [
      {
        "external_id": "ITEM-001",
        "project_number": "PROJECT-KTR-789",
        "title": "Concrete C25/30",
        "quantity": 50,
        "net_price": 1000,
        "price_per_unit": 20,
        "product": {
          "title": "Concrete",
          "unit": "m3"
        }
      }
    ]
  }
]
'

import requests

url = "https://api.comstruct.com/v1/purchase-orders"

payload = [
    {
        "contract_number": "PO-2024-001",
        "title": "Concrete Materials Order",
        "supplier": { "external_id": "SUPPLIER-123456" },
        "purchase_order_items": [
            {
                "external_id": "ITEM-001",
                "project_number": "PROJECT-KTR-789",
                "title": "Concrete C25/30",
                "quantity": 50,
                "net_price": 1000,
                "price_per_unit": 20,
                "product": {
                    "title": "Concrete",
                    "unit": "m3"
                }
            }
        ]
    }
]
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([
    {
      contract_number: 'PO-2024-001',
      title: 'Concrete Materials Order',
      supplier: {external_id: 'SUPPLIER-123456'},
      purchase_order_items: [
        {
          external_id: 'ITEM-001',
          project_number: 'PROJECT-KTR-789',
          title: 'Concrete C25/30',
          quantity: 50,
          net_price: 1000,
          price_per_unit: 20,
          product: {title: 'Concrete', unit: 'm3'}
        }
      ]
    }
  ])
};

fetch('https://api.comstruct.com/v1/purchase-orders', 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.comstruct.com/v1/purchase-orders",
  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([
    [
        'contract_number' => 'PO-2024-001',
        'title' => 'Concrete Materials Order',
        'supplier' => [
                'external_id' => 'SUPPLIER-123456'
        ],
        'purchase_order_items' => [
                [
                                'external_id' => 'ITEM-001',
                                'project_number' => 'PROJECT-KTR-789',
                                'title' => 'Concrete C25/30',
                                'quantity' => 50,
                                'net_price' => 1000,
                                'price_per_unit' => 20,
                                'product' => [
                                                                'title' => 'Concrete',
                                                                'unit' => 'm3'
                                ]
                ]
        ]
    ]
  ]),
  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://api.comstruct.com/v1/purchase-orders"

	payload := strings.NewReader("[\n  {\n    \"contract_number\": \"PO-2024-001\",\n    \"title\": \"Concrete Materials Order\",\n    \"supplier\": {\n      \"external_id\": \"SUPPLIER-123456\"\n    },\n    \"purchase_order_items\": [\n      {\n        \"external_id\": \"ITEM-001\",\n        \"project_number\": \"PROJECT-KTR-789\",\n        \"title\": \"Concrete C25/30\",\n        \"quantity\": 50,\n        \"net_price\": 1000,\n        \"price_per_unit\": 20,\n        \"product\": {\n          \"title\": \"Concrete\",\n          \"unit\": \"m3\"\n        }\n      }\n    ]\n  }\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://api.comstruct.com/v1/purchase-orders")
  .header("X-API-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("[\n  {\n    \"contract_number\": \"PO-2024-001\",\n    \"title\": \"Concrete Materials Order\",\n    \"supplier\": {\n      \"external_id\": \"SUPPLIER-123456\"\n    },\n    \"purchase_order_items\": [\n      {\n        \"external_id\": \"ITEM-001\",\n        \"project_number\": \"PROJECT-KTR-789\",\n        \"title\": \"Concrete C25/30\",\n        \"quantity\": 50,\n        \"net_price\": 1000,\n        \"price_per_unit\": 20,\n        \"product\": {\n          \"title\": \"Concrete\",\n          \"unit\": \"m3\"\n        }\n      }\n    ]\n  }\n]")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.comstruct.com/v1/purchase-orders")

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  {\n    \"contract_number\": \"PO-2024-001\",\n    \"title\": \"Concrete Materials Order\",\n    \"supplier\": {\n      \"external_id\": \"SUPPLIER-123456\"\n    },\n    \"purchase_order_items\": [\n      {\n        \"external_id\": \"ITEM-001\",\n        \"project_number\": \"PROJECT-KTR-789\",\n        \"title\": \"Concrete C25/30\",\n        \"quantity\": 50,\n        \"net_price\": 1000,\n        \"price_per_unit\": 20,\n        \"product\": {\n          \"title\": \"Concrete\",\n          \"unit\": \"m3\"\n        }\n      }\n    ]\n  }\n]"

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