curl --request POST \
  --url https://api.example.com/customer/webhooks/subscriptions \
  --header 'Content-Type: application/json' \
  --header 'X-API-NONCE: <x-api-nonce>' \
  --header 'X-API-SIGNATURE: <x-api-signature>' \
  --header 'X-API-SUBSCRIPTION-KEY: <x-api-subscription-key>' \
  --header 'X-API-TIMESTAMP: <x-api-timestamp>' \
  --data '
{
  "event_types": "transaction",
  "callback_url": "https://example.com/webhook",
  "description": "Transaction events"
}
'

import requests

url = "https://api.example.com/customer/webhooks/subscriptions"

payload = {
    "event_types": "transaction",
    "callback_url": "https://example.com/webhook",
    "description": "Transaction events"
}
headers = {
    "X-API-SIGNATURE": "<x-api-signature>",
    "X-API-TIMESTAMP": "<x-api-timestamp>",
    "X-API-NONCE": "<x-api-nonce>",
    "X-API-SUBSCRIPTION-KEY": "<x-api-subscription-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'X-API-SIGNATURE': '<x-api-signature>',
    'X-API-TIMESTAMP': '<x-api-timestamp>',
    'X-API-NONCE': '<x-api-nonce>',
    'X-API-SUBSCRIPTION-KEY': '<x-api-subscription-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    event_types: 'transaction',
    callback_url: 'https://example.com/webhook',
    description: 'Transaction events'
  })
};

fetch('https://api.example.com/customer/webhooks/subscriptions', 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.example.com/customer/webhooks/subscriptions",
  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([
    'event_types' => 'transaction',
    'callback_url' => 'https://example.com/webhook',
    'description' => 'Transaction events'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-NONCE: <x-api-nonce>",
    "X-API-SIGNATURE: <x-api-signature>",
    "X-API-SUBSCRIPTION-KEY: <x-api-subscription-key>",
    "X-API-TIMESTAMP: <x-api-timestamp>"
  ],
]);

$response = curl_exec($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.example.com/customer/webhooks/subscriptions"

	payload := strings.NewReader("{\n  \"event_types\": \"transaction\",\n  \"callback_url\": \"https://example.com/webhook\",\n  \"description\": \"Transaction events\"\n}")

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

	req.Header.Add("X-API-SIGNATURE", "<x-api-signature>")
	req.Header.Add("X-API-TIMESTAMP", "<x-api-timestamp>")
	req.Header.Add("X-API-NONCE", "<x-api-nonce>")
	req.Header.Add("X-API-SUBSCRIPTION-KEY", "<x-api-subscription-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.example.com/customer/webhooks/subscriptions")
  .header("X-API-SIGNATURE", "<x-api-signature>")
  .header("X-API-TIMESTAMP", "<x-api-timestamp>")
  .header("X-API-NONCE", "<x-api-nonce>")
  .header("X-API-SUBSCRIPTION-KEY", "<x-api-subscription-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"event_types\": \"transaction\",\n  \"callback_url\": \"https://example.com/webhook\",\n  \"description\": \"Transaction events\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/customer/webhooks/subscriptions")

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

request = Net::HTTP::Post.new(url)
request["X-API-SIGNATURE"] = '<x-api-signature>'
request["X-API-TIMESTAMP"] = '<x-api-timestamp>'
request["X-API-NONCE"] = '<x-api-nonce>'
request["X-API-SUBSCRIPTION-KEY"] = '<x-api-subscription-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"event_types\": \"transaction\",\n  \"callback_url\": \"https://example.com/webhook\",\n  \"description\": \"Transaction events\"\n}"

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

{
  "message": "<string>",
  "data": {
    "subscription_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "event_type": "1234",
    "callback_url": "https://example.com/webhook",
    "created_at": "1234",
    "description": "Transaction events",
    "status": "1234",
    "updated_at": "1234"
  }
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "input": "<unknown>",
      "ctx": {}
    }
  ]
}