diff --git a/assets/js/src/newsletter_editor/blocks/posts.js b/assets/js/src/newsletter_editor/blocks/posts.js
index c16a5bf235..547a421e32 100644
--- a/assets/js/src/newsletter_editor/blocks/posts.js
+++ b/assets/js/src/newsletter_editor/blocks/posts.js
@@ -81,15 +81,14 @@ define([
     },
     fetchAvailablePosts: function() {
       var that = this;
-      // TODO: Move this logic to new AJAX query format
-      //mailpoet_post_wpi('posts.php', this.toJSON(), function(response) {
-        //console.log('Posts fetched', arguments);
-        //that.get('_availablePosts').reset(response);
-        //that.get('_selectedPosts').reset(); // Empty out the collection
-        //that.trigger('change:_availablePosts');
-      //}, function() {
-        //console.log('Posts fetchPosts error', arguments);
-      //});
+      WordpressComponent.getPosts(this.toJSON()).done(function(posts) {
+        console.log('Posts fetched', arguments);
+        that.get('_availablePosts').reset(posts);
+        that.get('_selectedPosts').reset(); // Empty out the collection
+        that.trigger('change:_availablePosts');
+      }).fail(function() {
+        console.log('Posts fetchPosts error', arguments);
+      });
     },
     /**
      * Batch more changes during a specific time, instead of fetching
diff --git a/assets/js/src/newsletter_editor/components/wordpress.js b/assets/js/src/newsletter_editor/components/wordpress.js
index 4123ec4d33..f45ae1fd42 100644
--- a/assets/js/src/newsletter_editor/components/wordpress.js
+++ b/assets/js/src/newsletter_editor/components/wordpress.js
@@ -7,8 +7,9 @@ define([
 
   var Module = {};
   var postTypesCache,
-      taxonomiesCache = [],
-      termsCache = [];
+      taxonomiesCache = {},
+      termsCache = {},
+      postsCache = {};
 
   Module.getPostTypes = function() {
     if (!postTypesCache) {
@@ -51,6 +52,19 @@ define([
     return termsCache[key];
   };
 
+  Module.getPosts = function(options) {
+    var key = JSON.stringify(options);
+    if (!postsCache[key]) {
+      postsCache[key] = MailPoet.Ajax.post({
+        endpoint: 'wordpress',
+        action: 'getPosts',
+        data: options || {},
+      });
+    }
+
+    return postsCache[key];
+  };
+
   App.on('start', function(options) {
     // Prefetch post types
     Module.getPostTypes();
diff --git a/lib/Router/Wordpress.php b/lib/Router/Wordpress.php
index 205fefde2b..c03ddcbe30 100644
--- a/lib/Router/Wordpress.php
+++ b/lib/Router/Wordpress.php
@@ -29,4 +29,50 @@ class Wordpress {
       'offset' => $limit * ($page - 1),
     )));
   }
+
+  function getPosts($args) {
+    $parameters = array(
+      'posts_per_page' => (isset($args['amount'])) ? (int)$args['amount'] : 10,
+      'post_type' => (isset($args['contentType'])) ? $args['contentType'] : 'post',
+      'post_status' => (isset($args['postStatus'])) ? $args['postStatus'] : 'publish',
+      'orderby' => 'date',
+      'order' => ($args['sortBy'] === 'newest') ? 'DESC' : 'ASC',
+    );
+
+    if (isset($args['search'])) {
+      $parameters['s'] = $args['search'];
+    }
+
+    if (isset($args['terms']) && is_array($args['terms']) && !empty($args['terms'])) {
+      // Add filtering by tags and categories
+      $tags = array();
+      $categories = array();
+      foreach($args['terms'] as $term) {
+        if ($term['taxonomy'] === 'category') $categories[] = $term['id'];
+        else if ($term['taxonomy'] === 'post_tag') $tags[] = $term['id'];
+      }
+
+      $taxonomies_query = array();
+      foreach (array('post_tag' => $tags, 'category' => $categories) as $taxonomy => $terms) {
+        if (!empty($terms)) {
+          $tax = array(
+            'taxonomy' => $taxonomy,
+            'field' => 'id',
+            'terms' => $terms,
+          );
+          if ($args['inclusionType'] === 'exclude') $tax['operator'] = 'NOT IN';
+          $taxonomies_query[] = $tax;
+        }
+      }
+
+      if (!empty($taxonomies_query)) {
+        // With exclusion we want to use 'AND', because we want posts that don't have excluded tags/categories
+        // But with inclusion we want to use 'OR', because we want posts that have any of the included tags/categories
+        $taxonomies_query['relation'] = ($args['inclusionType'] === 'exclude') ? 'AND' : 'OR';
+        $parameters['tax_query'] = $taxonomies_query;
+      }
+    }
+
+    wp_send_json(get_posts($parameters));
+  }
 }