diff --git a/application/controllers/Api.php b/application/controllers/Api.php
index 6f5091984..4ba1fc3b7 100644
--- a/application/controllers/Api.php
+++ b/application/controllers/Api.php
@@ -168,14 +168,16 @@ class API extends CI_Controller {
 		$raw = file_get_contents("php://input");
 		$raw = $raw = preg_replace('#<([eE][oO][rR])>[\r\n\t]+#', '<$1>', $raw);
 		$obj = json_decode($raw,true);
-		$raw='';
 		if ($obj === NULL) {
+		    log_message("Debug",'API Call 200. Wrong JSON provided: '.$raw);
 		    echo json_encode(['status' => 'failed', 'reason' => "wrong JSON"]);
 		    die();
 		}
+		$raw='';
 
 		if(!isset($obj['key']) || $this->api_model->authorize($obj['key']) == 0) {
 		   http_response_code(401);
+		   log_message("Debug",'API Call 401. Invalid API Key: '.($obj['key'] ?? 'N/A'));
 		   echo json_encode(['status' => 'failed', 'reason' => "missing or wrong api key"]);
 		   die();
 		}
@@ -205,6 +207,7 @@ class API extends CI_Controller {
 
 		if(!isset($obj['station_profile_id']) || $this->stations->check_station_against_user($obj['station_profile_id'], $userid) == false) {
 			http_response_code(401);
+			log_message("Debug",'API Call 401: Wrong station_id '.($obj['station_profile_id'] ?? 'N/A').' for User '.$userid);
 			echo json_encode(['status' => 'failed', 'reason' => "station id does not belong to the API key owner."]);
 			die();
 		}
@@ -263,9 +266,11 @@ class API extends CI_Controller {
 
 			if ($adif_errors == 0) {
 				http_response_code(201);
+				log_message("Debug",'API Call 201: QSO created for Station-ID: '.($obj['station_profile_id'] ?? 'N/A').' and User: '.$userid);
 				echo json_encode(['status' => 'created', 'type' => $obj['type'], 'string' => $obj['string'], 'adif_count' => $adif_count, 'adif_errors' => $adif_errors, 'messages' => $return_msg ]);
 			} else {
 				$return_msg[]=$custom_errors;
+				log_message("Debug",'API Call 400: QSO NOT created for Station-ID: '.($obj['station_profile_id'] ?? 'N/A').' and User: '.$userid.' Reason: '.implode($return_msg));
 				http_response_code(400);
 				echo json_encode(['status' => 'abort', 'type' => $obj['type'], 'string' => $obj['string'], 'adif_count' => $adif_count, 'adif_errors' => $adif_errors, 'messages' => $return_msg ]);
 			}