diff --git a/app/app/Services/External/YooKassaLivenessProbe.php b/app/app/Services/External/YooKassaLivenessProbe.php
new file mode 100644
index 00000000..1e1c1ba5
--- /dev/null
+++ b/app/app/Services/External/YooKassaLivenessProbe.php
@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Services\External;
+
+use Illuminate\Support\Facades\Http;
+
+/**
+ * Живость платёжного шлюза ЮKassa: GET /v3/me под Basic-авторизацией магазина
+ * (shopId + секретный ключ). 200 → жив. Денег не тратит (справочный эндпоинт).
+ * Нет ключей → grey (нечего проверять).
+ */
+class YooKassaLivenessProbe implements LivenessProbe
+{
+    public function serviceKey(): string
+    {
+        return 'yookassa';
+    }
+
+    public function check(): LivenessReading
+    {
+        $shopId = (string) config('services.yookassa.shop_id');
+        $secret = (string) config('services.yookassa.secret_key');
+        if ($shopId === '' || $secret === '') {
+            return LivenessReading::unknown('yookassa', 'ключи ЮKassa не заданы');
+        }
+
+        try {
+            $url = rtrim((string) config('services.yookassa.api_url', 'https://api.yookassa.ru/v3'), '/').'/me';
+            $resp = Http::withBasicAuth($shopId, $secret)->timeout(5)->acceptJson()->get($url);
+            if ($resp->ok()) {
+                return LivenessReading::alive('yookassa', 'шлюз отвечает');
+            }
+
+            return LivenessReading::down('yookassa', 'HTTP '.$resp->status());
+        } catch (\Throwable $e) {
+            return LivenessReading::down('yookassa', $e->getMessage());
+        }
+    }
+}
diff --git a/app/config/services.php b/app/config/services.php
index d68401af..6a12d5b6 100644
--- a/app/config/services.php
+++ b/app/config/services.php
@@ -116,6 +116,9 @@ return [
     // опубликованными ЮKassa подсетями: 185.71.76.0/27,185.71.77.0/27,77.75.153.0/25,
     // 77.75.154.128/25,77.75.156.11,77.75.156.35,2a02:5180::/32.
     'yookassa' => [
+        'shop_id' => env('YOOKASSA_SHOP_ID'),
+        'secret_key' => env('YOOKASSA_SECRET_KEY'),
+        'api_url' => env('YOOKASSA_API_URL', 'https://api.yookassa.ru/v3'),
         'webhook_ip_allowlist' => array_values(array_filter(array_map(
             'trim',
             explode(',', (string) env('YOOKASSA_WEBHOOK_IPS', '')),
diff --git a/app/tests/Unit/External/YooKassaLivenessProbeTest.php b/app/tests/Unit/External/YooKassaLivenessProbeTest.php
new file mode 100644
index 00000000..9a3b1d2e
--- /dev/null
+++ b/app/tests/Unit/External/YooKassaLivenessProbeTest.php
@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Services\External\YooKassaLivenessProbe;
+use Illuminate\Support\Facades\Http;
+use Tests\TestCase;
+
+uses(TestCase::class); // нужен booted-app: config()/Http::fake()
+
+beforeEach(function () {
+    config()->set('services.yookassa.shop_id', '1392092');
+    config()->set('services.yookassa.secret_key', 'test_secret');
+    config()->set('services.yookassa.api_url', 'https://api.yookassa.ru/v3');
+});
+
+it('зелёный при 200 от /me', function () {
+    Http::fake(['api.yookassa.ru/v3/me' => Http::response(['account_id' => '1392092'], 200)]);
+    $r = (new YooKassaLivenessProbe)->check();
+    expect($r->serviceKey)->toBe('yookassa');
+    expect($r->light)->toBe('green');
+});
+
+it('красный при 401', function () {
+    Http::fake(['api.yookassa.ru/v3/me' => Http::response(['type' => 'error'], 401)]);
+    expect((new YooKassaLivenessProbe)->check()->light)->toBe('red');
+});
+
+it('серый, когда ключи не заданы', function () {
+    config()->set('services.yookassa.shop_id', '');
+    config()->set('services.yookassa.secret_key', '');
+    expect((new YooKassaLivenessProbe)->check()->light)->toBe('grey');
+});
+
+it('красный при сетевой ошибке (проба не бросает)', function () {
+    Http::fake(fn () => throw new RuntimeException('network down'));
+    expect((new YooKassaLivenessProbe)->check()->light)->toBe('red');
+});