curl --request POST \
  --url https://api.withallo.com/v2/api/webhooks \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "url": "https://example.com/webhooks/allo",
  "topics": [
    "call.received",
    "sms.received"
  ],
  "description": "Production event stream"
}
'

import requests

url = "https://api.withallo.com/v2/api/webhooks"

payload = {
    "url": "https://example.com/webhooks/allo",
    "topics": ["call.received", "sms.received"],
    "description": "Production event stream"
}
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    url: 'https://example.com/webhooks/allo',
    topics: ['call.received', 'sms.received'],
    description: 'Production event stream'
  })
};

fetch('https://api.withallo.com/v2/api/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://api.withallo.com/v2/api/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([
    'url' => 'https://example.com/webhooks/allo',
    'topics' => [
        'call.received',
        'sms.received'
    ],
    'description' => 'Production event stream'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "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://api.withallo.com/v2/api/webhooks"

	payload := strings.NewReader("{\n  \"url\": \"https://example.com/webhooks/allo\",\n  \"topics\": [\n    \"call.received\",\n    \"sms.received\"\n  ],\n  \"description\": \"Production event stream\"\n}")

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

	req.Header.Add("Authorization", "<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.withallo.com/v2/api/webhooks")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"url\": \"https://example.com/webhooks/allo\",\n  \"topics\": [\n    \"call.received\",\n    \"sms.received\"\n  ],\n  \"description\": \"Production event stream\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.withallo.com/v2/api/webhooks")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"url\": \"https://example.com/webhooks/allo\",\n  \"topics\": [\n    \"call.received\",\n    \"sms.received\"\n  ],\n  \"description\": \"Production event stream\"\n}"

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

{
  "data": {
    "id": "ep_2NfDKEm9sF8xK3pQr1Zt",
    "url": "https://example.com/webhooks/allo",
    "topics": [
      "call.received",
      "sms.received"
    ],
    "description": "Production event stream",
    "enabled": true,
    "signing_secret": "whsec_C2FVsBQIhrscChlQIMV+b5sSYspob7oD",
    "created_at": "2026-04-21T14:30:00Z"
  }
}

{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "retryable": true,
    "request_id": "<string>",
    "retry_after_seconds": 123
  }
}

{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "retryable": true,
    "request_id": "<string>",
    "retry_after_seconds": 123
  }
}

{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "retryable": true,
    "request_id": "<string>",
    "retry_after_seconds": 123
  }
}