diff --git a/actions/ConnectivityAction.php b/actions/ConnectivityAction.php
index 9a78d167..ac86fa1b 100644
--- a/actions/ConnectivityAction.php
+++ b/actions/ConnectivityAction.php
@@ -24,8 +24,6 @@
  */
 class ConnectivityAction implements ActionInterface
 {
-    public $userData = [];
-
     private BridgeFactory $bridgeFactory;
 
     public function __construct()
@@ -33,18 +31,18 @@ class ConnectivityAction implements ActionInterface
         $this->bridgeFactory = new \BridgeFactory();
     }
 
-    public function execute()
+    public function execute(array $request)
     {
         if (!Debug::isEnabled()) {
             returnError('This action is only available in debug mode!', 400);
         }
 
-        if (!isset($this->userData['bridge'])) {
+        if (!isset($request['bridge'])) {
             $this->returnEntryPage();
             return;
         }
 
-        $bridgeName = $this->userData['bridge'];
+        $bridgeName = $request['bridge'];
 
         $bridgeClassName = $this->bridgeFactory->sanitizeBridgeName($bridgeName);
 
diff --git a/actions/DetectAction.php b/actions/DetectAction.php
index dc6cdc61..1ed002af 100644
--- a/actions/DetectAction.php
+++ b/actions/DetectAction.php
@@ -14,14 +14,12 @@
 
 class DetectAction implements ActionInterface
 {
-    public $userData = [];
-
-    public function execute()
+    public function execute(array $request)
     {
-        $targetURL = $this->userData['url']
+        $targetURL = $request['url']
             or returnClientError('You must specify a url!');
 
-        $format = $this->userData['format']
+        $format = $request['format']
             or returnClientError('You must specify a format!');
 
         $bridgeFactory = new \BridgeFactory();
diff --git a/actions/DisplayAction.php b/actions/DisplayAction.php
index b345bddc..d8baf016 100644
--- a/actions/DisplayAction.php
+++ b/actions/DisplayAction.php
@@ -14,19 +14,20 @@
 
 class DisplayAction implements ActionInterface
 {
-    public $userData = [];
-
-    public function execute()
+    public function execute(array $request)
     {
         $bridgeFactory = new \BridgeFactory();
 
-        $bridgeClassName = isset($this->userData['bridge']) ? $bridgeFactory->sanitizeBridgeName($this->userData['bridge']) : null;
+        $bridgeClassName = null;
+        if (isset($request['bridge'])) {
+            $bridgeClassName = $bridgeFactory->sanitizeBridgeName($request['bridge']);
+        }
 
         if ($bridgeClassName === null) {
             throw new \InvalidArgumentException('Bridge name invalid!');
         }
 
-        $format = $this->userData['format']
+        $format = $request['format']
             or returnClientError('You must specify a format!');
 
         // whitelist control
@@ -39,8 +40,8 @@ class DisplayAction implements ActionInterface
         $bridge = $bridgeFactory->create($bridgeClassName);
         $bridge->loadConfiguration();
 
-        $noproxy = array_key_exists('_noproxy', $this->userData)
-            && filter_var($this->userData['_noproxy'], FILTER_VALIDATE_BOOLEAN);
+        $noproxy = array_key_exists('_noproxy', $request)
+            && filter_var($request['_noproxy'], FILTER_VALIDATE_BOOLEAN);
 
         if (defined('PROXY_URL') && PROXY_BYBRIDGE && $noproxy) {
             define('NOPROXY', true);
@@ -48,22 +49,22 @@ class DisplayAction implements ActionInterface
 
         // Cache timeout
         $cache_timeout = -1;
-        if (array_key_exists('_cache_timeout', $this->userData)) {
+        if (array_key_exists('_cache_timeout', $request)) {
             if (!CUSTOM_CACHE_TIMEOUT) {
-                unset($this->userData['_cache_timeout']);
-                $uri = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH) . '?' . http_build_query($this->userData);
+                unset($request['_cache_timeout']);
+                $uri = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH) . '?' . http_build_query($request);
                 header('Location: ' . $uri, true, 301);
                 exit;
             }
 
-            $cache_timeout = filter_var($this->userData['_cache_timeout'], FILTER_VALIDATE_INT);
+            $cache_timeout = filter_var($request['_cache_timeout'], FILTER_VALIDATE_INT);
         } else {
             $cache_timeout = $bridge->getCacheTimeout();
         }
 
         // Remove parameters that don't concern bridges
         $bridge_params = array_diff_key(
-            $this->userData,
+            $request,
             array_fill_keys(
                 [
                     'action',
@@ -79,7 +80,7 @@ class DisplayAction implements ActionInterface
 
         // Remove parameters that don't concern caches
         $cache_params = array_diff_key(
-            $this->userData,
+            $request,
             array_fill_keys(
                 [
                     'action',
@@ -162,19 +163,19 @@ class DisplayAction implements ActionInterface
                         $item = new \FeedItem();
 
                         // Create "new" error message every 24 hours
-                        $this->userData['_error_time'] = urlencode((int)(time() / 86400));
+                        $request['_error_time'] = urlencode((int)(time() / 86400));
 
                         $message = sprintf(
                             'Bridge returned error %s! (%s)',
                             $e->getCode(),
-                            $this->userData['_error_time']
+                            $request['_error_time']
                         );
                         $item->setTitle($message);
 
                         $item->setURI(
                             (isset($_SERVER['REQUEST_URI']) ? parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH) : '')
                             . '?'
-                            . http_build_query($this->userData)
+                            . http_build_query($request)
                         );
 
                         $item->setTimestamp(time());
diff --git a/actions/ListAction.php b/actions/ListAction.php
index 58a79ce5..5076b6dc 100644
--- a/actions/ListAction.php
+++ b/actions/ListAction.php
@@ -14,7 +14,7 @@
 
 class ListAction implements ActionInterface
 {
-    public function execute()
+    public function execute(array $request)
     {
         $list = new StdClass();
         $list->bridges = [];
diff --git a/index.php b/index.php
index 39e970c5..9eddc71b 100644
--- a/index.php
+++ b/index.php
@@ -8,18 +8,18 @@ rss-bridge from the command line
 */
 if (isset($argv)) {
     parse_str(implode('&', array_slice($argv, 1)), $cliArgs);
-    $params = array_merge($_GET, $cliArgs);
+    $request = array_merge($_GET, $cliArgs);
 } else {
-    $params = $_GET;
+    $request = $_GET;
 }
 
 try {
     $actionFactory = new ActionFactory();
 
-    if (array_key_exists('action', $params)) {
-        $action = $actionFactory->create($params['action']);
-        $action->userData = $params;
-        $action->execute();
+    if (array_key_exists('action', $request)) {
+        $action = $actionFactory->create($request['action']);
+
+        $action->execute($request);
     } else {
         $showInactive = filter_input(INPUT_GET, 'show_inactive', FILTER_VALIDATE_BOOLEAN);
         echo BridgeList::create($showInactive);
diff --git a/lib/ActionInterface.php b/lib/ActionInterface.php
index 78284ab4..ea5020a3 100644
--- a/lib/ActionInterface.php
+++ b/lib/ActionInterface.php
@@ -24,5 +24,5 @@ interface ActionInterface
      *
      * @return void
      */
-    public function execute();
+    public function execute(array $request);
 }
diff --git a/tests/Actions/ListActionTest.php b/tests/Actions/ListActionTest.php
index 5056050e..f3d06db6 100644
--- a/tests/Actions/ListActionTest.php
+++ b/tests/Actions/ListActionTest.php
@@ -85,7 +85,7 @@ class ListActionTest extends TestCase
         $action = $actionFactory->create('list');
 
         ob_start();
-        $action->execute();
+        $action->execute([]);
         $this->data = ob_get_contents();
         ob_clean();
         ob_end_flush();