curl --request POST \
  --url https://channels-service-alpha.fourvenues.com/tickets/{ticketId}/upselling/checkout \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "redirect_url": "https://app.yourwebpage.com/checkout/internal-id/success",
  "error_url": "https://app.yourwebpage.com/checkout/internal-id/error",
  "supplements": [
    {
      "supplement_id": "<string>",
      "quantity": 2
    }
  ],
  "send_resources": false,
  "metadata": {}
}
'

import requests

url = "https://channels-service-alpha.fourvenues.com/tickets/{ticketId}/upselling/checkout"

payload = {
    "redirect_url": "https://app.yourwebpage.com/checkout/internal-id/success",
    "error_url": "https://app.yourwebpage.com/checkout/internal-id/error",
    "supplements": [
        {
            "supplement_id": "<string>",
            "quantity": 2
        }
    ],
    "send_resources": False,
    "metadata": {}
}
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({
    redirect_url: 'https://app.yourwebpage.com/checkout/internal-id/success',
    error_url: 'https://app.yourwebpage.com/checkout/internal-id/error',
    supplements: [{supplement_id: '<string>', quantity: 2}],
    send_resources: false,
    metadata: {}
  })
};

fetch('https://channels-service-alpha.fourvenues.com/tickets/{ticketId}/upselling/checkout', 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://channels-service-alpha.fourvenues.com/tickets/{ticketId}/upselling/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([
    'redirect_url' => 'https://app.yourwebpage.com/checkout/internal-id/success',
    'error_url' => 'https://app.yourwebpage.com/checkout/internal-id/error',
    'supplements' => [
        [
                'supplement_id' => '<string>',
                'quantity' => 2
        ]
    ],
    'send_resources' => false,
    'metadata' => [
        
    ]
  ]),
  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://channels-service-alpha.fourvenues.com/tickets/{ticketId}/upselling/checkout"

	payload := strings.NewReader("{\n  \"redirect_url\": \"https://app.yourwebpage.com/checkout/internal-id/success\",\n  \"error_url\": \"https://app.yourwebpage.com/checkout/internal-id/error\",\n  \"supplements\": [\n    {\n      \"supplement_id\": \"<string>\",\n      \"quantity\": 2\n    }\n  ],\n  \"send_resources\": false,\n  \"metadata\": {}\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://channels-service-alpha.fourvenues.com/tickets/{ticketId}/upselling/checkout")
  .header("X-Api-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"redirect_url\": \"https://app.yourwebpage.com/checkout/internal-id/success\",\n  \"error_url\": \"https://app.yourwebpage.com/checkout/internal-id/error\",\n  \"supplements\": [\n    {\n      \"supplement_id\": \"<string>\",\n      \"quantity\": 2\n    }\n  ],\n  \"send_resources\": false,\n  \"metadata\": {}\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://channels-service-alpha.fourvenues.com/tickets/{ticketId}/upselling/checkout")

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  \"redirect_url\": \"https://app.yourwebpage.com/checkout/internal-id/success\",\n  \"error_url\": \"https://app.yourwebpage.com/checkout/internal-id/error\",\n  \"supplements\": [\n    {\n      \"supplement_id\": \"<string>\",\n      \"quantity\": 2\n    }\n  ],\n  \"send_resources\": false,\n  \"metadata\": {}\n}"

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

{
  "data": {
    "payment_id": "<string>",
    "payment_url": "<string>",
    "total_amount": 123,
    "supplements_price": 123,
    "supplements_service_charge_total": 123,
    "organization_fee": 123,
    "fees": {
      "fee_type": "fixed",
      "fee_quantity": 123,
      "organization_fee": 123,
      "supplements_service_charge_total": 123
    },
    "supplements": [
      {
        "supplement_id": "<string>",
        "label": "<string>",
        "price": 123,
        "purchase_quantity": 123,
        "line_total": 123,
        "service_charge_total": 123,
        "line_total_with_fees": 123,
        "service_charge_amount": 123,
        "service_charge_type": "<string>"
      }
    ]
  },
  "success": true
}