curl --request POST \
  --url https://app.papelship.com/api_user/api/v1/checkout \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --header 'x-store-hash: <api-key>' \
  --data '
{
  "order_id": 123,
  "items": [
    {
      "product_id": 123,
      "quantity": 1
    }
  ]
}
'

const options = {
  method: 'POST',
  headers: {
    'x-api-key': '<api-key>',
    'x-store-hash': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({order_id: 123, items: [{product_id: 123, quantity: 1}]})
};

fetch('https://app.papelship.com/api_user/api/v1/checkout', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://app.papelship.com/api_user/api/v1/checkout"

payload = {
    "order_id": 123,
    "items": [
        {
            "product_id": 123,
            "quantity": 1
        }
    ]
}
headers = {
    "x-api-key": "<api-key>",
    "x-store-hash": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://app.papelship.com/api_user/api/v1/checkout",
  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([
    'order_id' => 123,
    'items' => [
        [
                'product_id' => 123,
                'quantity' => 1
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-key: <api-key>",
    "x-store-hash: <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://app.papelship.com/api_user/api/v1/checkout"

	payload := strings.NewReader("{\n  \"order_id\": 123,\n  \"items\": [\n    {\n      \"product_id\": 123,\n      \"quantity\": 1\n    }\n  ]\n}")

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

	req.Header.Add("x-api-key", "<api-key>")
	req.Header.Add("x-store-hash", "<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))

}

{
  "success": true
}