diff --git a/install/agent-install.sh b/install/agent-install.sh
index 2c8c023..5a59c55 100644
--- a/install/agent-install.sh
+++ b/install/agent-install.sh
@@ -82,12 +82,20 @@ EOF
     echo "$code"
 }
 
-echo "ServerManager Agent started (interval: ${INTERVAL}s)"
+echo "ServerManager Agent started"
+echo "  Server: $SERVER_URL/api/metrics/push"
+echo "  Interval: ${INTERVAL}s"
+echo "  Host: $(hostname)"
 sleep 2
 while true; do
     collect_metrics
     http_code=$(push_metrics)
     echo "[$(date)] HTTP $http_code"
+    if [ "$http_code" = "200" ]; then
+        true
+    elif [ "$http_code" = "0" ]; then
+        echo "  curl failed — check SERVER_URL=$SERVER_URL"
+    fi
     sleep "$INTERVAL"
 done
 AGENTSCRIPT
diff --git a/src/Services/AgentService.php b/src/Services/AgentService.php
index ea44e9c..ea05604 100644
--- a/src/Services/AgentService.php
+++ b/src/Services/AgentService.php
@@ -38,7 +38,9 @@ class AgentService
         $serverUrl = rtrim((App::getConfig()['app']['url'] ?? ''), '/');
 
         if (empty($serverUrl)) {
-            $serverUrl = ($_SERVER['HTTPS'] ?? '' === 'on' ? 'https://' : 'http://') . ($_SERVER['HTTP_HOST'] ?? 'localhost');
+            $scheme = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https://' : 'http://';
+            $host = $_SERVER['HTTP_HOST'] ?? 'localhost';
+            $serverUrl = $scheme . $host;
         }
 
         $scriptPath = $this->basePath . '/install/agent-install.sh';