diff --git a/app/Api/Middleware/AuthenticationApiMiddleware.php b/app/Api/Middleware/AuthenticationApiMiddleware.php
index 5f63e1a18..b16e10b81 100644
--- a/app/Api/Middleware/AuthenticationApiMiddleware.php
+++ b/app/Api/Middleware/AuthenticationApiMiddleware.php
@@ -32,13 +32,20 @@ class AuthenticationApiMiddleware extends Base implements MiddlewareInterface
         'getDefaultTaskColors',
         'getColorList',
         'getProjectById',
+        'getSubTask',
         'getTask',
         'getTaskByReference',
+        'getTimeSpent',
         'getAllTasks',
+        'getAllSubTasks',
+        'hasTimer',
+        'logStartTime',
+        'logEndTime',
         'openTask',
         'closeTask',
         'moveTaskPosition',
         'createTask',
+        'createSubtask',
         'updateTask',
         'getBoard',
         'getProjectActivity',
diff --git a/app/Api/SubtaskTimeTrackingApi.php b/app/Api/SubtaskTimeTrackingApi.php
new file mode 100644
index 000000000..0e700b31d
--- /dev/null
+++ b/app/Api/SubtaskTimeTrackingApi.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Kanboard\Api;
+
+use Kanboard\Core\Base;
+
+/**
+ * Subtask Time Tracking  API controller
+ *
+ * @package  api
+ * @author   Nikolaos Georgakis
+ */
+class SubtaskTimeTrackingApi extends Base
+{
+    public function hasTimer($subtask_id,$user_id)
+    {
+        return $this->subtaskTimeTrackingModel->hasTimer($subtask_id,$user_id);
+    }
+
+    public function logStartTime($subtask_id,$user_id)
+    {
+        return $this->subtaskTimeTrackingModel->logStartTime($subtask_id,$user_id);
+    }
+
+    public function logEndTime($subtask_id,$user_id)
+    {
+        return $this->subtaskTimeTrackingModel->logEndTime($subtask_id,$user_id);
+    }
+
+    public function getTimeSpent($subtask_id,$user_id)
+    {
+        return $this->subtaskTimeTrackingModel->getTimeSpent($subtask_id,$user_id);
+    }
+}
diff --git a/app/ServiceProvider/ApiProvider.php b/app/ServiceProvider/ApiProvider.php
index 19d945f6e..93b3c7f58 100644
--- a/app/ServiceProvider/ApiProvider.php
+++ b/app/ServiceProvider/ApiProvider.php
@@ -18,6 +18,7 @@ use Kanboard\Api\Middleware\AuthenticationApiMiddleware;
 use Kanboard\Api\ProjectApi;
 use Kanboard\Api\ProjectPermissionApi;
 use Kanboard\Api\SubtaskApi;
+use Kanboard\Api\SubtaskTimeTrackingApi;
 use Kanboard\Api\SwimlaneApi;
 use Kanboard\Api\TaskApi;
 use Kanboard\Api\TaskLinkApi;
@@ -60,6 +61,7 @@ class ApiProvider implements ServiceProviderInterface
             ->withObject(new ProjectApi($container))
             ->withObject(new ProjectPermissionApi($container))
             ->withObject(new SubtaskApi($container))
+            ->withObject(new SubtaskTimeTrackingApi($container))
             ->withObject(new SwimlaneApi($container))
             ->withObject(new TaskApi($container))
             ->withObject(new TaskLinkApi($container))