diff --git a/appinfo/info.xml b/appinfo/info.xml
index 41f0e37..5aac8a2 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -4,7 +4,7 @@
   <name>f7support</name>
   <summary>Support ticket client for F7cloud (F7cloud-compatible)</summary>
   <description>f7support client app for creating and viewing support tickets.</description>
-  <version>0.1.8</version>
+  <version>0.1.9</version>
   <licence>AGPL</licence>
   <author>f7support team</author>
   <namespace>F7Support</namespace>
diff --git a/appinfo/routes.php b/appinfo/routes.php
index e210b44..0517f1b 100644
--- a/appinfo/routes.php
+++ b/appinfo/routes.php
@@ -1,8 +1,15 @@
 <?php
 
 return [
-    'routes' => [
-        ['name' => 'page#index', 'url' => '/', 'verb' => 'GET'],
-    ],
+	'routes' => [
+		['name' => 'page#index', 'url' => '/', 'verb' => 'GET'],
+	],
+	'ocs' => [
+		[
+			'name' => 'push_api#notify',
+			'url' => '/api/v{version}/push',
+			'verb' => 'POST',
+			'requirements' => ['version' => '1'],
+		],
+	],
 ];
-
diff --git a/js/main.js b/js/main.js
index 3f9f426..1e160fe 100644
--- a/js/main.js
+++ b/js/main.js
@@ -1589,6 +1589,10 @@
       .catch((e) => showError(e.message))
       .finally(() => {
         scheduleTicketsBoardPolling();
+        const ticketFromUrl = new URLSearchParams(window.location.search).get("ticket");
+        if (ticketFromUrl) {
+          void tryOpenTicket(ticketFromUrl.trim());
+        }
       });
   });
 })();
diff --git a/lib/AppInfo/Application.php b/lib/AppInfo/Application.php
new file mode 100644
index 0000000..b04de1e
--- /dev/null
+++ b/lib/AppInfo/Application.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\F7Support\AppInfo;
+
+use OCA\F7Support\Notification\Notifier;
+use OCP\AppFramework\App;
+use OCP\AppFramework\Bootstrap\IBootContext;
+use OCP\AppFramework\Bootstrap\IBootstrap;
+use OCP\AppFramework\Bootstrap\IRegistrationContext;
+
+class Application extends App implements IBootstrap {
+	public const APP_ID = 'f7support';
+
+	public function __construct(array $urlParams = []) {
+		parent::__construct(self::APP_ID, $urlParams);
+	}
+
+	public function register(IRegistrationContext $context): void {
+		$context->registerNotifierService(Notifier::class);
+	}
+
+	public function boot(IBootContext $context): void {
+	}
+}
diff --git a/lib/Application.php b/lib/Application.php
deleted file mode 100644
index 4d534a4..0000000
--- a/lib/Application.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace OCA\F7Support;
-
-use OCP\AppFramework\App;
-
-class Application extends App {
-    public const APP_ID = 'f7support';
-
-    public function __construct(array $urlParams = []) {
-        parent::__construct(self::APP_ID, $urlParams);
-    }
-}
-
diff --git a/lib/Controller/PageController.php b/lib/Controller/PageController.php
index 49feac7..dd9380a 100644
--- a/lib/Controller/PageController.php
+++ b/lib/Controller/PageController.php
@@ -50,6 +50,10 @@ class PageController extends Controller {
 		// Отключить вызовы с клиента: occ config:app:set f7support client_read_receipts --value=0
 		$clientReadReceipts = $this->config->getAppValue('f7support', 'client_read_receipts', '0');
 
+		// Push webhook (support.f7cloud.ru → f7push): POST /ocs/v2.php/apps/f7support/api/v1/push
+		// Secret: occ config:app:get f7push api_secret  (or f7support push_webhook_secret)
+		// occ config:app:set f7support push_enabled --value=yes
+
 		// Периодический GET /api/client/tickets (мс): has_unread и отпечаток карточки; WebSocket только у открытого тикета.
 		// По умолчанию 3000 (3 с). Пустая строка в конфиге трактуется как 3000. Явное «0» отключает опрос. Иначе 3000…120000. occ: f7support tickets_poll_ms
 		$rawPoll = trim((string) $this->config->getAppValue('f7support', 'tickets_poll_ms', '3000'));
diff --git a/lib/Controller/PushApiController.php b/lib/Controller/PushApiController.php
new file mode 100644
index 0000000..25ec3c4
--- /dev/null
+++ b/lib/Controller/PushApiController.php
@@ -0,0 +1,87 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\F7Support\Controller;
+
+use OCA\F7Support\Service\ConfigService;
+use OCA\F7Support\Service\PushBridgeService;
+use OCP\AppFramework\Http;
+use OCP\AppFramework\Http\DataResponse;
+use OCP\AppFramework\OCSController;
+use OCP\IRequest;
+use OCP\IUserManager;
+
+/**
+ * Webhook for support.f7cloud.ru: notify F7cloud user about a new support reply.
+ *
+ * Header: X-F7-Support-Push-Secret or X-F7-Push-Secret
+ * JSON: { userId?, email?, ticketNumber, body?, messagePreview?, ticketSubject? }
+ */
+class PushApiController extends OCSController {
+	public function __construct(
+		string $appName,
+		IRequest $request,
+		private ConfigService $config,
+		private PushBridgeService $pushBridge,
+		private IUserManager $userManager,
+	) {
+		parent::__construct($appName, $request);
+	}
+
+	public function notify(): DataResponse {
+		if (!$this->authorize()) {
+			return new DataResponse(['error' => 'forbidden'], Http::STATUS_FORBIDDEN);
+		}
+
+		$params = $this->request->getParams();
+		$userId = trim((string)($params['userId'] ?? $params['user'] ?? ''));
+		if ($userId === '') {
+			$email = trim((string)($params['email'] ?? $params['clientEmail'] ?? ''));
+			if ($email !== '') {
+				$user = $this->userManager->getByEmail($email);
+				if ($user !== null) {
+					$userId = $user->getUID();
+				}
+			}
+		}
+
+		$ticketNumber = trim((string)($params['ticketNumber'] ?? $params['ticket'] ?? ''));
+		$preview = trim((string)($params['body'] ?? $params['messagePreview'] ?? $params['preview'] ?? ''));
+		$ticketSubject = trim((string)($params['ticketSubject'] ?? $params['subject'] ?? ''));
+
+		if ($userId === '' || $ticketNumber === '') {
+			return new DataResponse(
+				['error' => 'userId (or email) and ticketNumber required'],
+				Http::STATUS_BAD_REQUEST
+			);
+		}
+
+		if ($this->userManager->get($userId) === null) {
+			return new DataResponse(['error' => 'user not found'], Http::STATUS_NOT_FOUND);
+		}
+
+		$queued = $this->pushBridge->notifyNewSupportMessage(
+			$userId,
+			$ticketNumber,
+			$preview,
+			$ticketSubject !== '' ? $ticketSubject : null,
+		);
+
+		return new DataResponse([
+			'success' => $queued,
+			'queued' => $queued,
+		]);
+	}
+
+	private function authorize(): bool {
+		$header = $this->request->getHeader('X-F7-Support-Push-Secret');
+		if ($header === '') {
+			$header = $this->request->getHeader('X-F7-Push-Secret');
+		}
+		if ($header === '') {
+			$header = (string)$this->request->getParam('secret', '');
+		}
+		return $this->config->verifyPushWebhookSecret($header);
+	}
+}
diff --git a/lib/Notification/Notifier.php b/lib/Notification/Notifier.php
new file mode 100644
index 0000000..affd00f
--- /dev/null
+++ b/lib/Notification/Notifier.php
@@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\F7Support\Notification;
+
+use OCP\IURLGenerator;
+use OCP\L10N\IFactory;
+use OCP\Notification\IManager as INotificationManager;
+use OCP\Notification\INotification;
+use OCP\Notification\INotifier;
+use OCP\Notification\UnknownNotificationException;
+
+class Notifier implements INotifier {
+	public function __construct(
+		private IFactory $l10nFactory,
+		private IURLGenerator $urlGenerator,
+		private INotificationManager $notificationManager,
+	) {
+	}
+
+	public function getID(): string {
+		return 'f7support';
+	}
+
+	public function getName(): string {
+		return $this->l10nFactory->get('f7support')->t('Support');
+	}
+
+	public function prepare(INotification $notification, string $languageCode): INotification {
+		if ($notification->getApp() !== 'f7support') {
+			throw new UnknownNotificationException();
+		}
+
+		if ($notification->getSubject() !== 'support_reply') {
+			throw new UnknownNotificationException();
+		}
+
+		$params = $notification->getSubjectParameters();
+		$ticketNumber = (string)($params['ticketNumber'] ?? '');
+		$ticketSubject = trim((string)($params['ticketSubject'] ?? ''));
+		$preview = trim((string)($params['preview'] ?? ''));
+
+		if ($preview === '') {
+			$msgParams = $notification->getMessageParameters();
+			$preview = trim((string)($msgParams['preview'] ?? ''));
+		}
+
+		if ($ticketSubject !== '') {
+			$title = 'Заявка ' . $ticketNumber . ': ' . $ticketSubject;
+		} else {
+			$title = 'Заявка ' . $ticketNumber;
+		}
+
+		if ($preview === '') {
+			$preview = 'Новый ответ от поддержки';
+		}
+
+		$icon = $this->urlGenerator->getAbsoluteURL(
+			$this->urlGenerator->imagePath('f7support', 'app.svg')
+		);
+
+		if ($this->notificationManager->isPreparingPushNotification()) {
+			$notification->setParsedSubject($title . "\n" . $preview);
+		} else {
+			$notification->setParsedSubject($title);
+			$notification->setParsedMessage($preview);
+		}
+
+		$notification->setIcon($icon);
+
+		return $notification;
+	}
+}
diff --git a/lib/Service/ConfigService.php b/lib/Service/ConfigService.php
new file mode 100644
index 0000000..be50b87
--- /dev/null
+++ b/lib/Service/ConfigService.php
@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\F7Support\Service;
+
+use OCP\IConfig;
+
+class ConfigService {
+	public const APP_ID = 'f7support';
+
+	public function __construct(
+		private IConfig $config,
+	) {
+	}
+
+	public function isPushEnabled(): bool {
+		return $this->config->getAppValue(self::APP_ID, 'push_enabled', 'yes') === 'yes';
+	}
+
+	public function getPushWebhookSecret(): string {
+		return trim($this->config->getAppValue(self::APP_ID, 'push_webhook_secret', ''));
+	}
+
+	public function verifyPushWebhookSecret(?string $provided): bool {
+		if ($provided === null || $provided === '') {
+			return false;
+		}
+
+		$own = $this->getPushWebhookSecret();
+		if ($own !== '' && hash_equals($own, $provided)) {
+			return true;
+		}
+
+		$f7pushSecret = trim($this->config->getAppValue('f7push', 'api_secret', ''));
+		if ($f7pushSecret !== '' && hash_equals($f7pushSecret, $provided)) {
+			return true;
+		}
+
+		return false;
+	}
+}
diff --git a/lib/Service/PushBridgeService.php b/lib/Service/PushBridgeService.php
new file mode 100644
index 0000000..3299294
--- /dev/null
+++ b/lib/Service/PushBridgeService.php
@@ -0,0 +1,83 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\F7Support\Service;
+
+use OCP\IURLGenerator;
+use OCP\Notification\IManager as INotificationManager;
+use Psr\Log\LoggerInterface;
+
+class PushBridgeService {
+	private const PREVIEW_MAX = 240;
+
+	public function __construct(
+		private INotificationManager $notificationManager,
+		private IURLGenerator $urlGenerator,
+		private ConfigService $config,
+		private LoggerInterface $logger,
+	) {
+	}
+
+	public function notifyNewSupportMessage(
+		string $userId,
+		string $ticketNumber,
+		string $messagePreview,
+		?string $ticketSubject = null,
+	): bool {
+		if (!$this->config->isPushEnabled()) {
+			return false;
+		}
+
+		$preview = $this->truncate($messagePreview);
+		if ($preview === '') {
+			$preview = 'Новый ответ от поддержки';
+		}
+
+		$subject = trim((string)$ticketSubject);
+		$link = $this->urlGenerator->linkToRouteAbsolute('f7support.page.index')
+			. '?ticket=' . rawurlencode($ticketNumber);
+
+		$notification = $this->notificationManager->createNotification();
+		$notification
+			->setApp('f7support')
+			->setUser($userId)
+			->setDateTime(new \DateTime())
+			->setObject('ticket', $ticketNumber)
+			->setSubject('support_reply', [
+				'ticketNumber' => $ticketNumber,
+				'ticketSubject' => $subject,
+				'preview' => $preview,
+			])
+			->setMessage('support_reply', [
+				'preview' => $preview,
+			])
+			->setLink($link);
+
+		try {
+			$this->notificationManager->notify($notification);
+			$this->logger->debug('f7support: push notification queued', [
+				'app' => 'f7support',
+				'user' => $userId,
+				'ticket' => $ticketNumber,
+			]);
+			return true;
+		} catch (\Throwable $e) {
+			$this->logger->warning('f7support: failed to queue push notification', [
+				'app' => 'f7support',
+				'user' => $userId,
+				'ticket' => $ticketNumber,
+				'exception' => $e,
+			]);
+			return false;
+		}
+	}
+
+	private function truncate(string $text): string {
+		$text = trim(preg_replace('/\s+/u', ' ', $text) ?? $text);
+		if ($text === '' || mb_strlen($text) <= self::PREVIEW_MAX) {
+			return $text;
+		}
+		return mb_substr($text, 0, self::PREVIEW_MAX - 1) . '…';
+	}
+}