Register webhook

curl --request POST \
  --url https://{instance}.{env}.on-hellgate.cloud/api/admin/webhooks \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "events": [],
  "url": "https://merchant.example.com/webhooks/specter"
}
'

import requests

url = "https://{instance}.{env}.on-hellgate.cloud/api/admin/webhooks"

payload = {
    "events": [],
    "url": "https://merchant.example.com/webhooks/specter"
}
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({events: [], url: 'https://merchant.example.com/webhooks/specter'})
};

fetch('https://{instance}.{env}.on-hellgate.cloud/api/admin/webhooks', 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://{instance}.{env}.on-hellgate.cloud/api/admin/webhooks",
  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([
    'events' => [
        
    ],
    'url' => 'https://merchant.example.com/webhooks/specter'
  ]),
  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://{instance}.{env}.on-hellgate.cloud/api/admin/webhooks"

	payload := strings.NewReader("{\n  \"events\": [],\n  \"url\": \"https://merchant.example.com/webhooks/specter\"\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://{instance}.{env}.on-hellgate.cloud/api/admin/webhooks")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"events\": [],\n  \"url\": \"https://merchant.example.com/webhooks/specter\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://{instance}.{env}.on-hellgate.cloud/api/admin/webhooks")

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  \"events\": [],\n  \"url\": \"https://merchant.example.com/webhooks/specter\"\n}"

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

{
  "id": "2f8d4b6c-9e1a-4c7f-b3d5-8a6e2c9f4b1d",
  "events": [
    "decision.block",
    "decision.review"
  ],
  "hmac_key": "q3Vt8hZ2mN0xYcLr5pW7sKfA1eJ9uDbG4oTnXiRvEyQ",
  "inserted_at": "2026-01-20T08:30:00Z",
  "updated_at": "2026-01-20T08:30:00Z",
  "url": "https://merchant.com.example/webhooks/specter"
}

{
  "classifier": "UNAUTHORIZED",
  "code": 401,
  "message": "No valid means of authentication was provided"
}

{
  "classifier": "FORBIDDEN",
  "code": 403,
  "message": "Not allowed to access this resource or feature"
}

{
  "classifier": "VALIDATION_ERROR",
  "code": 422,
  "validation_errors": [
    {
      "message": "must be a positive integer",
      "path": "limit"
    }
  ]
}