diff --git a/src/application/controllers/api/v1/Admins.php b/src/application/controllers/api/v1/Admins.php
new file mode 100644
index 00000000..6469739e
--- /dev/null
+++ b/src/application/controllers/api/v1/Admins.php
@@ -0,0 +1,74 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+/* ----------------------------------------------------------------------------
+ * Easy!Appointments - Open Source Web Scheduler
+ *
+ * @package     EasyAppointments
+ * @author      A.Tselegidis <alextselegidis@gmail.com>
+ * @copyright   Copyright (c) 2013 - 2016, Alex Tselegidis
+ * @license     http://opensource.org/licenses/GPL-3.0 - GPLv3
+ * @link        http://easyappointments.org
+ * @since       v1.2.0
+ * ---------------------------------------------------------------------------- */
+
+require_once __DIR__ . '/API_V1_Controller.php';
+
+/**
+ * Admins Controller
+ *
+ * @package Controllers
+ * @subpackage API
+ */
+class Admins extends API_V1_Controller {
+    /**
+     * Class Constructor
+     */
+    public function __construct() {
+        parent::__construct();
+    }
+
+    /**
+     * GET API Method 
+     * 
+     * @param int $id Optional (null), the record ID to be returned.
+     * 
+     * @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function get($id = null) {
+        
+    }
+
+    /**
+     * POST API Method 
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function post() {
+        
+    }
+
+    /**
+     * PUT API Method 
+     *
+     * @param int $id The record ID to be updated.
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function put($id) {
+
+    }
+
+    /**
+     * DELETE API Method 
+     *
+     * @param int $id The record ID to be deleted.
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function delete($id) {
+
+    }
+}
+
+/* End of file Admins.php */
+/* Location: ./application/controllers/api/v1/Admins.php */
diff --git a/src/application/controllers/api/v1/Appointments.php b/src/application/controllers/api/v1/Appointments.php
index 9a584c3a..325c0af9 100644
--- a/src/application/controllers/api/v1/Appointments.php
+++ b/src/application/controllers/api/v1/Appointments.php
@@ -70,5 +70,5 @@ class Appointments extends API_V1_Controller {
     }
 }
 
-/* End of file appointments.php */
-/* Location: ./application/controllers/appointments.php */
+/* End of file Appointments.php */
+/* Location: ./application/controllers/api/v1/Appointments.php */
diff --git a/src/application/controllers/api/v1/Categories.php b/src/application/controllers/api/v1/Categories.php
new file mode 100644
index 00000000..a24988e5
--- /dev/null
+++ b/src/application/controllers/api/v1/Categories.php
@@ -0,0 +1,74 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+/* ----------------------------------------------------------------------------
+ * Easy!Appointments - Open Source Web Scheduler
+ *
+ * @package     EasyAppointments
+ * @author      A.Tselegidis <alextselegidis@gmail.com>
+ * @copyright   Copyright (c) 2013 - 2016, Alex Tselegidis
+ * @license     http://opensource.org/licenses/GPL-3.0 - GPLv3
+ * @link        http://easyappointments.org
+ * @since       v1.2.0
+ * ---------------------------------------------------------------------------- */
+
+require_once __DIR__ . '/API_V1_Controller.php';
+
+/**
+ * Categories Controller
+ *
+ * @package Controllers
+ * @subpackage API
+ */
+class Categories extends API_V1_Controller {
+    /**
+     * Class Constructor
+     */
+    public function __construct() {
+        parent::__construct();
+    }
+
+    /**
+     * GET API Method 
+     * 
+     * @param int $id Optional (null), the record ID to be returned.
+     * 
+     * @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function get($id = null) {
+        
+    }
+
+    /**
+     * POST API Method 
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function post() {
+        
+    }
+
+    /**
+     * PUT API Method 
+     *
+     * @param int $id The record ID to be updated.
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function put($id) {
+
+    }
+
+    /**
+     * DELETE API Method 
+     *
+     * @param int $id The record ID to be deleted.
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function delete($id) {
+
+    }
+}
+
+/* End of file Categories.php */
+/* Location: ./application/controllers/api/v1/Categories.php */
diff --git a/src/application/controllers/api/v1/Customers.php b/src/application/controllers/api/v1/Customers.php
new file mode 100644
index 00000000..fa573d1a
--- /dev/null
+++ b/src/application/controllers/api/v1/Customers.php
@@ -0,0 +1,74 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+/* ----------------------------------------------------------------------------
+ * Easy!Appointments - Open Source Web Scheduler
+ *
+ * @package     EasyAppointments
+ * @author      A.Tselegidis <alextselegidis@gmail.com>
+ * @copyright   Copyright (c) 2013 - 2016, Alex Tselegidis
+ * @license     http://opensource.org/licenses/GPL-3.0 - GPLv3
+ * @link        http://easyappointments.org
+ * @since       v1.2.0
+ * ---------------------------------------------------------------------------- */
+
+require_once __DIR__ . '/API_V1_Controller.php';
+
+/**
+ * Customers Controller
+ *
+ * @package Controllers
+ * @subpackage API
+ */
+class Customers extends API_V1_Controller {
+    /**
+     * Class Constructor
+     */
+    public function __construct() {
+        parent::__construct();
+    }
+
+    /**
+     * GET API Method 
+     * 
+     * @param int $id Optional (null), the record ID to be returned.
+     * 
+     * @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function get($id = null) {
+        
+    }
+
+    /**
+     * POST API Method 
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function post() {
+        
+    }
+
+    /**
+     * PUT API Method 
+     *
+     * @param int $id The record ID to be updated.
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function put($id) {
+
+    }
+
+    /**
+     * DELETE API Method 
+     *
+     * @param int $id The record ID to be deleted.
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function delete($id) {
+
+    }
+}
+
+/* End of file Customers.php */
+/* Location: ./application/controllers/api/v1/Customers.php */
diff --git a/src/application/controllers/api/v1/Providers.php b/src/application/controllers/api/v1/Providers.php
new file mode 100644
index 00000000..632212d3
--- /dev/null
+++ b/src/application/controllers/api/v1/Providers.php
@@ -0,0 +1,74 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+/* ----------------------------------------------------------------------------
+ * Easy!Appointments - Open Source Web Scheduler
+ *
+ * @package     EasyAppointments
+ * @author      A.Tselegidis <alextselegidis@gmail.com>
+ * @copyright   Copyright (c) 2013 - 2016, Alex Tselegidis
+ * @license     http://opensource.org/licenses/GPL-3.0 - GPLv3
+ * @link        http://easyappointments.org
+ * @since       v1.2.0
+ * ---------------------------------------------------------------------------- */
+
+require_once __DIR__ . '/API_V1_Controller.php';
+
+/**
+ * Providers Controller
+ *
+ * @package Controllers
+ * @subpackage API
+ */
+class Providers extends API_V1_Controller {
+    /**
+     * Class Constructor
+     */
+    public function __construct() {
+        parent::__construct();
+    }
+
+    /**
+     * GET API Method 
+     * 
+     * @param int $id Optional (null), the record ID to be returned.
+     * 
+     * @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function get($id = null) {
+        
+    }
+
+    /**
+     * POST API Method 
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function post() {
+        
+    }
+
+    /**
+     * PUT API Method 
+     *
+     * @param int $id The record ID to be updated.
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function put($id) {
+
+    }
+
+    /**
+     * DELETE API Method 
+     *
+     * @param int $id The record ID to be deleted.
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function delete($id) {
+
+    }
+}
+
+/* End of file Providers.php */
+/* Location: ./application/controllers/api/v1/Providers.php */
diff --git a/src/application/controllers/api/v1/Secretaries.php b/src/application/controllers/api/v1/Secretaries.php
new file mode 100644
index 00000000..ac822d59
--- /dev/null
+++ b/src/application/controllers/api/v1/Secretaries.php
@@ -0,0 +1,74 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+/* ----------------------------------------------------------------------------
+ * Easy!Appointments - Open Source Web Scheduler
+ *
+ * @package     EasyAppointments
+ * @author      A.Tselegidis <alextselegidis@gmail.com>
+ * @copyright   Copyright (c) 2013 - 2016, Alex Tselegidis
+ * @license     http://opensource.org/licenses/GPL-3.0 - GPLv3
+ * @link        http://easyappointments.org
+ * @since       v1.2.0
+ * ---------------------------------------------------------------------------- */
+
+require_once __DIR__ . '/API_V1_Controller.php';
+
+/**
+ * Secretaries Controller
+ *
+ * @package Controllers
+ * @subpackage API
+ */
+class Secretaries extends API_V1_Controller {
+    /**
+     * Class Constructor
+     */
+    public function __construct() {
+        parent::__construct();
+    }
+
+    /**
+     * GET API Method 
+     * 
+     * @param int $id Optional (null), the record ID to be returned.
+     * 
+     * @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function get($id = null) {
+        
+    }
+
+    /**
+     * POST API Method 
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function post() {
+        
+    }
+
+    /**
+     * PUT API Method 
+     *
+     * @param int $id The record ID to be updated.
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function put($id) {
+
+    }
+
+    /**
+     * DELETE API Method 
+     *
+     * @param int $id The record ID to be deleted.
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function delete($id) {
+
+    }
+}
+
+/* End of file Secretaries.php */
+/* Location: ./application/controllers/api/v1/Secretaries.php */
diff --git a/src/application/controllers/api/v1/Services.php b/src/application/controllers/api/v1/Services.php
new file mode 100644
index 00000000..eda39ee6
--- /dev/null
+++ b/src/application/controllers/api/v1/Services.php
@@ -0,0 +1,74 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+/* ----------------------------------------------------------------------------
+ * Easy!Appointments - Open Source Web Scheduler
+ *
+ * @package     EasyAppointments
+ * @author      A.Tselegidis <alextselegidis@gmail.com>
+ * @copyright   Copyright (c) 2013 - 2016, Alex Tselegidis
+ * @license     http://opensource.org/licenses/GPL-3.0 - GPLv3
+ * @link        http://easyappointments.org
+ * @since       v1.2.0
+ * ---------------------------------------------------------------------------- */
+
+require_once __DIR__ . '/API_V1_Controller.php';
+
+/**
+ * Services Controller
+ *
+ * @package Controllers
+ * @subpackage API
+ */
+class Services extends API_V1_Controller {
+    /**
+     * Class Constructor
+     */
+    public function __construct() {
+        parent::__construct();
+    }
+
+    /**
+     * GET API Method 
+     * 
+     * @param int $id Optional (null), the record ID to be returned.
+     * 
+     * @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function get($id = null) {
+        
+    }
+
+    /**
+     * POST API Method 
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function post() {
+        
+    }
+
+    /**
+     * PUT API Method 
+     *
+     * @param int $id The record ID to be updated.
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function put($id) {
+
+    }
+
+    /**
+     * DELETE API Method 
+     *
+     * @param int $id The record ID to be deleted.
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function delete($id) {
+
+    }
+}
+
+/* End of file Services.php */
+/* Location: ./application/controllers/api/v1/Services.php */
diff --git a/src/application/controllers/api/v1/Settings.php b/src/application/controllers/api/v1/Settings.php
new file mode 100644
index 00000000..12629c0a
--- /dev/null
+++ b/src/application/controllers/api/v1/Settings.php
@@ -0,0 +1,74 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+/* ----------------------------------------------------------------------------
+ * Easy!Appointments - Open Source Web Scheduler
+ *
+ * @package     EasyAppointments
+ * @author      A.Tselegidis <alextselegidis@gmail.com>
+ * @copyright   Copyright (c) 2013 - 2016, Alex Tselegidis
+ * @license     http://opensource.org/licenses/GPL-3.0 - GPLv3
+ * @link        http://easyappointments.org
+ * @since       v1.2.0
+ * ---------------------------------------------------------------------------- */
+
+require_once __DIR__ . '/API_V1_Controller.php';
+
+/**
+ * Settings Controller
+ *
+ * @package Controllers
+ * @subpackage API
+ */
+class Settings extends API_V1_Controller {
+    /**
+     * Class Constructor
+     */
+    public function __construct() {
+        parent::__construct();
+    }
+
+    /**
+     * GET API Method 
+     * 
+     * @param int $id Optional (null), the record ID to be returned.
+     * 
+     * @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function get($id = null) {
+        
+    }
+
+    /**
+     * POST API Method 
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function post() {
+        
+    }
+
+    /**
+     * PUT API Method 
+     *
+     * @param int $id The record ID to be updated.
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function put($id) {
+
+    }
+
+    /**
+     * DELETE API Method 
+     *
+     * @param int $id The record ID to be deleted.
+     * 
+     * @return @return \Engine\Api\V1\Response Returns data response. 
+     */
+    public function delete($id) {
+
+    }
+}
+
+/* End of file Settings.php */
+/* Location: ./application/controllers/api/v1/Settings.php */