diff --git a/api/v1/invitations/index.php b/api/v1/invitations/index.php
new file mode 100644
index 00000000000..047483af047
--- /dev/null
+++ b/api/v1/invitations/index.php
@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * @defgroup api_v1_invitations Invitations API requests
+ */
+
+/**
+ * @file api/v1/invitations/index.php
+ *
+ * Copyright (c) 2023 Simon Fraser University
+ * Copyright (c) 2023 John Willinsky
+ * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
+ *
+ * @ingroup api_v1_invitations
+ *
+ * @brief Handle API requests for invitations.
+ */
+
+use PKP\API\v1\invitations\PKPInvitationController;
+
+return new \PKP\handler\APIHandler(new PKPInvitationController());
diff --git a/pages/reviewer/ReviewerHandler.php b/pages/reviewer/ReviewerHandler.php
index ffef835299b..ce04ff713b3 100644
--- a/pages/reviewer/ReviewerHandler.php
+++ b/pages/reviewer/ReviewerHandler.php
@@ -60,9 +60,8 @@ public function authorize($request, &$args, $roleAssignments)
         if ($context->getData('reviewerAccessKeysEnabled')) {
             $accessKeyCode = $request->getUserVar('key');
             if ($accessKeyCode) {
-                $keyHash = md5($accessKeyCode);
-
-                $invitation = Repo::invitation()->getBOByKeyHash($keyHash);
+                $invitation = Repo::invitation()
+                    ->getByMD5Key($accessKeyCode);
 
                 if (isset($invitation)) {
                     $invitation->acceptHandle();