diff --git a/api/endpoints/agent.php b/api/endpoints/agent.php
index cf90c42..5ffe940 100644
--- a/api/endpoints/agent.php
+++ b/api/endpoints/agent.php
@@ -51,7 +51,12 @@ $browserActions = ['list', 'status', 'myip'];
 
 if ($agentAction !== 'register') {
     if (in_array($agentAction, $browserActions)) {
-        $agent = null; // browser-accessible via session auth already validated by api.php
+        $token   = $_SESSION['jarvis_token'] ?? '';
+        $localIP = $_SERVER['REMOTE_ADDR'] ?? '';
+        if (empty($token) && !in_array($localIP, ['127.0.0.1', '::1', JARVIS_IP])) {
+            agent_error(401, 'Unauthorized');
+        }
+        $agent = null;
     } else {
         if (empty($agentKey)) agent_error(401, 'X-Agent-Key header required');
         $agent = get_agent_by_key($agentKey);
@@ -67,7 +72,7 @@ switch ($agentAction) {
     case 'register':
         if ($method !== 'POST') agent_error(405, 'POST only');
         $regKey = $_SERVER['HTTP_X_REGISTRATION_KEY'] ?? ($data['registration_key'] ?? '');
-        if ($regKey !== AGENT_REGISTRATION_KEY) agent_error(403, 'Invalid registration key');
+        if (!hash_equals(AGENT_REGISTRATION_KEY, $regKey)) agent_error(403, 'Invalid registration key');
 
         $hostname     = trim($data['hostname'] ?? '');
         $agentType    = $data['agent_type'] ?? 'linux';
@@ -108,8 +113,9 @@ switch ($agentAction) {
 
         // Mark as delivered
         if ($commands) {
-            $ids = implode(',', array_column($commands, 'id'));
-            JarvisDB::query("UPDATE agent_commands SET status='delivered', delivered_at=NOW() WHERE id IN ($ids)");
+            $cmdIds = array_column($commands, 'id');
+            $placeholders = implode(',', array_fill(0, count($cmdIds), '?'));
+            JarvisDB::query("UPDATE agent_commands SET status='delivered', delivered_at=NOW() WHERE id IN ($placeholders)", $cmdIds);
             foreach ($commands as &$cmd) {
                 $cmd['command_data'] = json_decode($cmd['command_data'] ?? '{}', true);
             }
diff --git a/api/endpoints/chat.php b/api/endpoints/chat.php
index 29d404b..9126e8c 100644
--- a/api/endpoints/chat.php
+++ b/api/endpoints/chat.php
@@ -581,7 +581,7 @@ if (!$reply && defined('GROQ_API_KEY') && GROQ_API_KEY) {
         ],
         CURLOPT_TIMEOUT        => GROQ_TIMEOUT,
         CURLOPT_CONNECTTIMEOUT => 5,
-        CURLOPT_SSL_VERIFYPEER => false,
+        CURLOPT_SSL_VERIFYPEER => true,
     ]);
 
     $resp = curl_exec($ch);
@@ -672,7 +672,7 @@ Respond as JARVIS. Voice readout: under 3 sentences unless detail is requested.
                 'Content-Type: application/json',
             ],
             CURLOPT_TIMEOUT        => 30,
-            CURLOPT_SSL_VERIFYPEER => false,
+            CURLOPT_SSL_VERIFYPEER => true,
         ]);
 
         $resp = curl_exec($ch);