Register a webhook

curl --request POST \
  --url https://api.antigen.sh/v1/hooks \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "event": "vulnerability.assignee_changed",
  "url": "https://automation.example.com/antigen/events",
  "enabled": true
}
'

import requests

url = "https://api.antigen.sh/v1/hooks"

payload = {
    "event": "vulnerability.assignee_changed",
    "url": "https://automation.example.com/antigen/events",
    "enabled": True
}
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({
    event: 'vulnerability.assignee_changed',
    url: 'https://automation.example.com/antigen/events',
    enabled: true
  })
};

fetch('https://api.antigen.sh/v1/hooks', 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.antigen.sh/v1/hooks",
  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' => 'vulnerability.assignee_changed',
    'url' => 'https://automation.example.com/antigen/events',
    'enabled' => true
  ]),
  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://api.antigen.sh/v1/hooks"

	payload := strings.NewReader("{\n  \"event\": \"vulnerability.assignee_changed\",\n  \"url\": \"https://automation.example.com/antigen/events\",\n  \"enabled\": true\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://api.antigen.sh/v1/hooks")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"event\": \"vulnerability.assignee_changed\",\n  \"url\": \"https://automation.example.com/antigen/events\",\n  \"enabled\": true\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.antigen.sh/v1/hooks")

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  \"event\": \"vulnerability.assignee_changed\",\n  \"url\": \"https://automation.example.com/antigen/events\",\n  \"enabled\": true\n}"

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

{
  "id": "hook_123",
  "event": "vulnerability.assignee_changed",
  "url": "https://automation.example.com/antigen/events",
  "enabled": true,
  "builtIn": false,
  "createdAt": "2026-09-13T10:00:00.000Z",
  "updatedAt": "2026-09-13T10:00:00.000Z",
  "secret": "whsec_example_only"
}

{
  "error": {
    "code": "invalid_request",
    "message": "Check the request fields and values."
  }
}

{
  "error": {
    "code": "unauthorized",
    "message": "Supply a valid API key."
  }
}

{
  "error": {
    "code": "forbidden",
    "message": "The API key does not permit this operation or requested scope."
  }
}

{
  "error": {
    "code": "rate_limited",
    "message": "Retry after the interval in Retry-After."
  }
}