diff --git a/assets/js/src/listing/listing.jsx b/assets/js/src/listing/listing.jsx
index f83ae74213..93bfa45915 100644
--- a/assets/js/src/listing/listing.jsx
+++ b/assets/js/src/listing/listing.jsx
@@ -456,20 +456,28 @@ const Listing = React.createClass({
           sort_by: this.state.sort_by,
           sort_order: this.state.sort_order
         }
+      }).always(() => {
+        this.setState({ loading: false });
       }).done((response) => {
         this.setState({
-          items: response.items || [],
-          filters: response.filters || {},
-          groups: response.groups || [],
-          count: response.count || 0,
-          loading: false
+          items: response.data || [],
+          filters: response.meta.filters || {},
+          groups: response.meta.groups || [],
+          count: response.meta.count || 0
         }, () => {
           // if viewing an empty trash
-          if (this.state.group === 'trash' && response.count === 0) {
+          if (this.state.group === 'trash' && response.meta.count === 0) {
             // redirect to default group
             this.handleGroup('all');
           }
         });
+      }).fail(function(response) {
+        if (response.errors.length > 0) {
+          MailPoet.Notice.error(
+            response.errors.map(function(error) { return error.message; }),
+            { scroll: true }
+          );
+        }
       });
     }
   },
diff --git a/lib/API/Endpoints/Forms.php b/lib/API/Endpoints/Forms.php
index 0c82d9d8fd..b552e25c8e 100644
--- a/lib/API/Endpoints/Forms.php
+++ b/lib/API/Endpoints/Forms.php
@@ -32,8 +32,8 @@ class Forms extends APIEndpoint {
 
     $listing_data = $listing->get();
 
-    // fetch segments relations for each returned item
-    foreach($listing_data['items'] as $key => $form) {
+    $data = array();
+    foreach($listing_data['items'] as $form) {
       $form = $form->asArray();
 
       $form['signups'] = StatisticsForms::getTotalSignups($form['id']);
@@ -43,10 +43,15 @@ class Forms extends APIEndpoint {
         ? $form['settings']['segments']
         : array()
       );
-      $listing_data['items'][$key] = $form;
+
+      $data[] = $form;
     }
 
-    return $listing_data;
+    return $this->successResponse($data, array(
+      'count' => $listing_data['count'],
+      'filters' => $listing_data['filters'],
+      'groups' => $listing_data['groups']
+    ));
   }
 
   function create() {
diff --git a/lib/API/Endpoints/Newsletters.php b/lib/API/Endpoints/Newsletters.php
index 1f91d3a9c8..99e423d920 100644
--- a/lib/API/Endpoints/Newsletters.php
+++ b/lib/API/Endpoints/Newsletters.php
@@ -285,15 +285,14 @@ class Newsletters extends APIEndpoint {
   }
 
   function listing($data = array()) {
-
     $listing = new Listing\Handler(
       '\MailPoet\Models\Newsletter',
       $data
     );
     $listing_data = $listing->get();
-    $subscriber = Subscriber::getCurrentWPUser();
 
-    foreach($listing_data['items'] as $key => $newsletter) {
+    $data = array();
+    foreach($listing_data['items'] as $newsletter) {
       $queue = false;
 
       if($newsletter->type === Newsletter::TYPE_STANDARD) {
@@ -325,14 +324,18 @@ class Newsletters extends APIEndpoint {
       }
 
       // get preview url
+      $subscriber = Subscriber::getCurrentWPUser();
       $newsletter->preview_url = NewsletterUrl::getViewInBrowserUrl(
         $newsletter, $subscriber, $queue, $preview = true);
 
-      // convert object to array
-      $listing_data['items'][$key] = $newsletter->asArray();
+      $data[] = $newsletter->asArray();
     }
 
-    return $listing_data;
+    return $this->successResponse($data, array(
+      'count' => $listing_data['count'],
+      'filters' => $listing_data['filters'],
+      'groups' => $listing_data['groups']
+    ));
   }
 
   function bulkAction($data = array()) {
diff --git a/lib/API/Endpoints/Segments.php b/lib/API/Endpoints/Segments.php
index f37fe6ed5b..4d655d8946 100644
--- a/lib/API/Endpoints/Segments.php
+++ b/lib/API/Endpoints/Segments.php
@@ -32,18 +32,22 @@ class Segments extends APIEndpoint {
 
     $listing_data = $listing->get();
 
-    // fetch segments relations for each returned item
-    foreach($listing_data['items'] as $key => $segment) {
+    $data = array();
+    foreach($listing_data['items'] as $segment) {
       $segment->subscribers_url = admin_url(
         'admin.php?page=mailpoet-subscribers#/filter[segment='.$segment->id.']'
       );
 
-      $listing_data['items'][$key] = $segment
+      $data[] = $segment
         ->withSubscribersCount()
         ->asArray();
     }
 
-    return $listing_data;
+    return $this->successResponse($data, array(
+      'count' => $listing_data['count'],
+      'filters' => $listing_data['filters'],
+      'groups' => $listing_data['groups']
+    ));
   }
 
   function save($data = array()) {
diff --git a/lib/API/Endpoints/Subscribers.php b/lib/API/Endpoints/Subscribers.php
index 6a47c96234..20d066600a 100644
--- a/lib/API/Endpoints/Subscribers.php
+++ b/lib/API/Endpoints/Subscribers.php
@@ -41,14 +41,18 @@ class Subscribers extends APIEndpoint {
 
     $listing_data = $listing->get();
 
-    // fetch segments relations for each returned item
-    foreach($listing_data['items'] as $key => $subscriber) {
-      $listing_data['items'][$key] = $subscriber
+    $data = array();
+    foreach($listing_data['items'] as $subscriber) {
+      $data[] = $subscriber
         ->withSubscriptions()
         ->asArray();
     }
 
-    return $listing_data;
+    return $this->successResponse($data, array(
+      'count' => $listing_data['count'],
+      'filters' => $listing_data['filters'],
+      'groups' => $listing_data['groups']
+    ));
   }
 
   function subscribe($data = array()) {
diff --git a/lib/Listing/Handler.php b/lib/Listing/Handler.php
index 8bb37fd4eb..ceefff0b3b 100644
--- a/lib/Listing/Handler.php
+++ b/lib/Listing/Handler.php
@@ -106,6 +106,7 @@ class Handler {
       );
     }
 
+    // get items and total count
     if(method_exists($this->model_class, 'listingQuery')) {
       $custom_query = call_user_func_array(
         array($this->model_class, 'listingQuery'),
@@ -135,7 +136,6 @@ class Handler {
         ->findMany();
     }
 
-
     return array(
       'count' => $count,
       'filters' => $filters,
diff --git a/tests/unit/API/FormsTest.php b/tests/unit/API/FormsTest.php
index ac796064f2..2795d07e5b 100644
--- a/tests/unit/API/FormsTest.php
+++ b/tests/unit/API/FormsTest.php
@@ -34,13 +34,17 @@ class FormsTest extends MailPoetTest {
   function testItCanGetListingData() {
     $router = new Forms();
     $response = $router->listing();
-    expect($response)->hasKey('filters');
-    expect($response)->hasKey('groups');
-    expect($response['count'])->equals(3);
-    expect($response['items'])->count(3);
-    expect($response['items'][0]['name'])->equals('Form 1');
-    expect($response['items'][1]['name'])->equals('Form 2');
-    expect($response['items'][2]['name'])->equals('Form 3');
+
+    expect($response->status)->equals(APIResponse::STATUS_OK);
+
+    expect($response->meta)->hasKey('filters');
+    expect($response->meta)->hasKey('groups');
+    expect($response->meta['count'])->equals(3);
+
+    expect($response->data)->count(3);
+    expect($response->data[0]['name'])->equals('Form 1');
+    expect($response->data[1]['name'])->equals('Form 2');
+    expect($response->data[2]['name'])->equals('Form 3');
   }
 
   function testItCanCreateANewForm() {
diff --git a/tests/unit/API/NewslettersTest.php b/tests/unit/API/NewslettersTest.php
index a6960bbca9..774fb8e920 100644
--- a/tests/unit/API/NewslettersTest.php
+++ b/tests/unit/API/NewslettersTest.php
@@ -220,25 +220,26 @@ class NewslettersTest extends MailPoetTest {
     $router = new Newsletters();
     $response = $router->listing();
 
-    expect($response)->hasKey('filters');
-    expect($response)->hasKey('groups');
+    expect($response->status)->equals(APIResponse::STATUS_OK);
 
-    expect($response['count'])->equals(2);
-    expect($response['items'])->count(2);
+    expect($response->meta)->hasKey('filters');
+    expect($response->meta)->hasKey('groups');
+    expect($response->meta['count'])->equals(2);
 
-    expect($response['items'][0]['subject'])->equals('My Standard Newsletter');
-    expect($response['items'][1]['subject'])->equals('My Post Notification');
+    expect($response->data)->count(2);
+    expect($response->data[0]['subject'])->equals('My Standard Newsletter');
+    expect($response->data[1]['subject'])->equals('My Post Notification');
 
     // 1st subscriber has 2 segments
-    expect($response['items'][0]['segments'])->count(2);
-    expect($response['items'][0]['segments'][0]['id'])
+    expect($response->data[0]['segments'])->count(2);
+    expect($response->data[0]['segments'][0]['id'])
       ->equals($segment_1->id);
-    expect($response['items'][0]['segments'][1]['id'])
+    expect($response->data[0]['segments'][1]['id'])
       ->equals($segment_2->id);
 
     // 2nd subscriber has 1 segment
-    expect($response['items'][1]['segments'])->count(1);
-    expect($response['items'][1]['segments'][0]['id'])
+    expect($response->data[1]['segments'])->count(1);
+    expect($response->data[1]['segments'][0]['id'])
       ->equals($segment_2->id);
   }
 
@@ -279,9 +280,11 @@ class NewslettersTest extends MailPoetTest {
       )
     ));
 
+    expect($response->status)->equals(APIResponse::STATUS_OK);
+
     // we should only get the standard newsletter
-    expect($response['count'])->equals(1);
-    expect($response['items'][0]['subject'])->equals($this->newsletter->subject);
+    expect($response->meta['count'])->equals(1);
+    expect($response->data[0]['subject'])->equals($this->newsletter->subject);
 
     // filter by 2nd segment
     $response = $router->listing(array(
@@ -290,8 +293,10 @@ class NewslettersTest extends MailPoetTest {
       )
     ));
 
+    expect($response->status)->equals(APIResponse::STATUS_OK);
+
     // we should have the 2 newsletters
-    expect($response['count'])->equals(2);
+    expect($response->meta['count'])->equals(2);
   }
 
   function testItCanLimitListing() {
@@ -303,9 +308,11 @@ class NewslettersTest extends MailPoetTest {
       'sort_order' => 'asc'
     ));
 
-    expect($response['count'])->equals(2);
-    expect($response['items'])->count(1);
-    expect($response['items'][0]['subject'])->equals(
+    expect($response->status)->equals(APIResponse::STATUS_OK);
+
+    expect($response->meta['count'])->equals(2);
+    expect($response->data)->count(1);
+    expect($response->data[0]['subject'])->equals(
       $this->post_notification->subject
     );
 
@@ -317,9 +324,9 @@ class NewslettersTest extends MailPoetTest {
       'sort_order' => 'asc'
     ));
 
-    expect($response['count'])->equals(2);
-    expect($response['items'])->count(1);
-    expect($response['items'][0]['subject'])->equals(
+    expect($response->meta['count'])->equals(2);
+    expect($response->data)->count(1);
+    expect($response->data[0]['subject'])->equals(
       $this->newsletter->subject
     );
   }
diff --git a/tests/unit/API/SegmentsTest.php b/tests/unit/API/SegmentsTest.php
index e58b27713f..6f9c970ec9 100644
--- a/tests/unit/API/SegmentsTest.php
+++ b/tests/unit/API/SegmentsTest.php
@@ -31,15 +31,17 @@ class SegmentsTest extends MailPoetTest {
   function testItCanGetListingData() {
     $router = new Segments();
     $response = $router->listing();
-    expect($response)->hasKey('filters');
-    expect($response)->hasKey('groups');
 
-    expect($response['count'])->equals(3);
-    expect($response['items'])->count(3);
+    expect($response->status)->equals(APIResponse::STATUS_OK);
 
-    expect($response['items'][0]['name'])->equals($this->segment_1->name);
-    expect($response['items'][1]['name'])->equals($this->segment_2->name);
-    expect($response['items'][2]['name'])->equals($this->segment_3->name);
+    expect($response->meta)->hasKey('filters');
+    expect($response->meta)->hasKey('groups');
+    expect($response->meta['count'])->equals(3);
+
+    expect($response->data)->count(3);
+    expect($response->data[0]['name'])->equals($this->segment_1->name);
+    expect($response->data[1]['name'])->equals($this->segment_2->name);
+    expect($response->data[2]['name'])->equals($this->segment_3->name);
   }
 
   function testItCanSaveASegment() {
diff --git a/tests/unit/API/SubscribersTest.php b/tests/unit/API/SubscribersTest.php
index 33ca434a50..edf562c3f6 100644
--- a/tests/unit/API/SubscribersTest.php
+++ b/tests/unit/API/SubscribersTest.php
@@ -155,7 +155,7 @@ class SubscribersTest extends MailPoetTest {
     ));
 
     // it should return all subscribers
-    expect($response['count'])->equals(2);
+    expect($response->meta['count'])->equals(2);
 
     // filter by 1st segment
     $response = $router->listing(array(
@@ -164,8 +164,8 @@ class SubscribersTest extends MailPoetTest {
       )
     ));
 
-    expect($response['count'])->equals(1);
-    expect($response['items'][0]['email'])->equals($this->subscriber_2->email);
+    expect($response->meta['count'])->equals(1);
+    expect($response->data[0]['email'])->equals($this->subscriber_2->email);
 
     // filter by 2nd segment
     $response = $router->listing(array(
@@ -174,8 +174,8 @@ class SubscribersTest extends MailPoetTest {
       )
     ));
 
-    expect($response['count'])->equals(1);
-    expect($response['items'][0]['email'])->equals($this->subscriber_2->email);
+    expect($response->meta['count'])->equals(1);
+    expect($response->data[0]['email'])->equals($this->subscriber_2->email);
   }
 
   function testItCanSearchListing() {
@@ -191,29 +191,29 @@ class SubscribersTest extends MailPoetTest {
     $response = $router->listing(array(
       'search' => ''
     ));
-    expect($response['count'])->equals(3);
+    expect($response->meta['count'])->equals(3);
 
     // search by email
     $response = $router->listing(array(
       'search' => '.me'
     ));
-    expect($response['count'])->equals(1);
-    expect($response['items'][0]['email'])->equals($new_subscriber->email);
+    expect($response->meta['count'])->equals(1);
+    expect($response->data[0]['email'])->equals($new_subscriber->email);
 
     // search by last name
     $response = $router->listing(array(
       'search' => 'doe'
     ));
-    expect($response['count'])->equals(2);
-    expect($response['items'][0]['email'])->equals($this->subscriber_1->email);
-    expect($response['items'][1]['email'])->equals($this->subscriber_2->email);
+    expect($response->meta['count'])->equals(2);
+    expect($response->data[0]['email'])->equals($this->subscriber_1->email);
+    expect($response->data[1]['email'])->equals($this->subscriber_2->email);
 
     // search by first name
     $response = $router->listing(array(
       'search' => 'billy'
     ));
-    expect($response['count'])->equals(1);
-    expect($response['items'][0]['email'])->equals($new_subscriber->email);
+    expect($response->meta['count'])->equals(1);
+    expect($response->data[0]['email'])->equals($new_subscriber->email);
   }
 
   function testItCanGroupListing() {
@@ -222,28 +222,28 @@ class SubscribersTest extends MailPoetTest {
     $subscribed_group = $router->listing(array(
       'group' => Subscriber::STATUS_SUBSCRIBED
     ));
-    expect($subscribed_group['count'])->equals(1);
-    expect($subscribed_group['items'][0]['email'])->equals(
+    expect($subscribed_group->meta['count'])->equals(1);
+    expect($subscribed_group->data[0]['email'])->equals(
       $this->subscriber_2->email
     );
 
     $unsubscribed_group = $router->listing(array(
       'group' => Subscriber::STATUS_UNSUBSCRIBED
     ));
-    expect($unsubscribed_group['count'])->equals(0);
+    expect($unsubscribed_group->meta['count'])->equals(0);
 
     $unconfirmed_group = $router->listing(array(
       'group' => Subscriber::STATUS_UNCONFIRMED
     ));
-    expect($unconfirmed_group['count'])->equals(1);
-    expect($unconfirmed_group['items'][0]['email'])->equals(
+    expect($unconfirmed_group->meta['count'])->equals(1);
+    expect($unconfirmed_group->data[0]['email'])->equals(
       $this->subscriber_1->email
     );
 
     $trashed_group = $router->listing(array(
       'group' => 'trash'
     ));
-    expect($trashed_group['count'])->equals(0);
+    expect($trashed_group->meta['count'])->equals(0);
 
     // trash 1st subscriber
     $this->subscriber_1->trash();
@@ -251,8 +251,8 @@ class SubscribersTest extends MailPoetTest {
     $trashed_group = $router->listing(array(
       'group' => 'trash'
     ));
-    expect($trashed_group['count'])->equals(1);
-    expect($trashed_group['items'][0]['email'])->equals(
+    expect($trashed_group->meta['count'])->equals(1);
+    expect($trashed_group->data[0]['email'])->equals(
       $this->subscriber_1->email
     );
   }
@@ -266,9 +266,9 @@ class SubscribersTest extends MailPoetTest {
       'sort_order' => 'asc'
     ));
 
-    expect($response['count'])->equals(2);
-    expect($response['items'])->count(1);
-    expect($response['items'][0]['email'])->equals(
+    expect($response->meta['count'])->equals(2);
+    expect($response->data)->count(1);
+    expect($response->data[0]['email'])->equals(
       $this->subscriber_2->email
     );
 
@@ -280,9 +280,9 @@ class SubscribersTest extends MailPoetTest {
       'sort_order' => 'asc'
     ));
 
-    expect($response['count'])->equals(2);
-    expect($response['items'])->count(1);
-    expect($response['items'][0]['email'])->equals(
+    expect($response->meta['count'])->equals(2);
+    expect($response->data)->count(1);
+    expect($response->data[0]['email'])->equals(
       $this->subscriber_1->email
     );
   }