event.unbind

// This snippet is an ES module: top-level await requires type="module" or a bundler.
// $b24 is an already-initialized SDK instance (see the SDK "Get started" guide).
import { Text } from '@bitrix24/b24jssdk'
import type { B24Frame } from '@bitrix24/b24jssdk'

declare const $b24: B24Frame

// Shape of the payload returned in result (match the "response handling" section of the page)
type EventUnbindResult = {
  count: number
}

try {
  const response = await $b24.actions.v2.call.make<EventUnbindResult>({
    method: 'event.unbind',
    params: {
      event: 'ONCRMLEADADD',
      handler: 'https://www.my-domain.ru/handler/',
      auth_type: 15,
    },
    requestId: Text.getUuidRfc4122()
  })

  // The payload is available only on a successful response
  if (!response.isSuccess) {
    console.error(response.getErrorMessages().join('; '))
  } else {
    const result = response.getData()!.result
    console.info('Unbound handlers count:', result.count)
  }
} catch (error) {
  // Thrown on transport or SDK failures (AjaxError, SdkError, etc.)
  console.error(error)
}

<!-- Load the SDK (UMD build); it is exposed as the global B24Js -->
<script src="https://unpkg.com/@bitrix24/b24jssdk@1/dist/umd/index.min.js"></script>
<script>
  async function unbindEvent() {
    try {
      // Initialize the SDK inside a Bitrix24 frame
      const $b24 = await B24Js.initializeB24Frame()

      const response = await $b24.actions.v2.call.make({
        method: 'event.unbind',
        params: {
          event: 'ONCRMLEADADD',
          handler: 'https://www.my-domain.ru/handler/',
          auth_type: 15,
        },
        requestId: B24Js.Text.getUuidRfc4122()
      })

      // The payload is available only on a successful response
      if (!response.isSuccess) {
        console.error(response.getErrorMessages().join('; '))
        return
      }

      const result = response.getData().result
      console.info('Unbound handlers count:', result.count)
    } catch (error) {
      // Thrown on transport or SDK failures (AjaxError, SdkError, etc.)
      console.error(error)
    }
  }

  document.addEventListener('DOMContentLoaded', unbindEvent)
</script>

from b24pysdk.errors import BitrixAPIError, BitrixSDKException

try:
    bitrix_response = client.event.unbind(
        event="ONCRMLEADADD",
        handler="https://www.my-domain.com/handler/",
        auth_type=15,
    ).response
    result = bitrix_response.result
    print(result)
except BitrixAPIError as error:
    print(
        "Ошибка Bitrix API",
        f"error: {error.error}",
        f"error_description: {error.error_description}",
        sep="\n",
    )
except BitrixSDKException as error:
    print(f"Ошибка Bitrix SDK: {error.message}")
except Exception as error:
    print(f"Непредвиденная ошибка: {error}")

try {
    $eventCode = 'your_event_code'; // Replace with your actual event code
    $handlerUrl = 'https://your.handler.url'; // Replace with your actual handler URL
    $userId = null; // Replace with your actual user ID or leave as null
    $result = $serviceBuilder
        ->getMainScope()
        ->event()
        ->unbind($eventCode, $handlerUrl, $userId);
    print($result->getUnbindedHandlersCount());
} catch (Throwable $e) {
    print('Error: ' . $e->getMessage());
}

require_once('crest.php');

$result = CRest::call(
    'event.unbind',
    [
        'EVENT' => 'ONCRMLEADADD',
        'HANDLER' => 'https://www.my-domain.ru/handler/',
        'AUTH_TYPE' => 15
    ]
);

echo '<PRE>';
print_r($result);
echo '</PRE>';