diff --git a/api/router/router.v1.php b/api/router/router.v1.php
index 1a6a359..b278819 100644
--- a/api/router/router.v1.php
+++ b/api/router/router.v1.php
@@ -41,6 +41,12 @@ function router_v1_dispatch(array $segments): void
             $handler = 'browser_quick_test_handle_request';
             break;
 
+        // 🔎 NEU: Debug-Endpoint für Session / Cookies
+        case 'debug.session':
+            $file    = $apibasedir . '/v1/debug/debug.session.php';
+            $handler = 'debug_session_handle_request';
+            break;
+
         default:
             http_response_code(404);
             echo json_encode([
diff --git a/api/v1/debug/debug.session.php b/api/v1/debug/debug.session.php
new file mode 100644
index 0000000..5965c4b
--- /dev/null
+++ b/api/v1/debug/debug.session.php
@@ -0,0 +1,22 @@
+<?php
+// /api/v1/debug/debug.session.php
+
+declare(strict_types=1);
+
+function debug_session_handle_request(): array
+{
+    if (session_status() !== PHP_SESSION_ACTIVE) {
+        session_start();
+    }
+
+    return [
+        'ok'         => true,
+        'session_id' => session_id(),
+        'session'    => $_SESSION,
+        'cookies'    => $_COOKIE,
+        'server'     => [
+            'host' => $_SERVER['HTTP_HOST']   ?? null,
+            'uri'  => $_SERVER['REQUEST_URI'] ?? null,
+        ],
+    ];
+}