diff --git a/activitypub-event-transformers.php b/activitypub-event-transformers.php
index 679308b..4fca954 100644
--- a/activitypub-event-transformers.php
+++ b/activitypub-event-transformers.php
@@ -9,6 +9,8 @@
  * Text Domain: activitypub-event-transformers
  *
  * ActivityPub tested up to: 1.2.0
+ *
+ * @package activitypub-event-transformer
  */
 
 if ( ! defined( 'ABSPATH' ) ) {
@@ -25,19 +27,24 @@ if ( ! defined( 'ABSPATH' ) ) {
  * @return void
  */
 function register_event_transformers( $transformers_manager ) {
-	// if ( ! function_exists( 'is_plugin_active' ) ) {
-    //  	require_once __DIR__ . '/wp-admin/includes/plugin.php';
-	// }
+	require_once __DIR__ . '/activitypub/transformer/class-tribe.php';
+	$transformers_manager->register( new \Tribe() );
 
-	// if ( is_plugin_active( 'the-events-calendar/the-events-calendar.php' ) ) {
-	// 	require_once __DIR__ . '/activitypub/transformer/tribe.php';
-	// 	$transformers_manager->register( new \Tribe() );
-	// }
-
-	// if ( is_plugin_active( 'vsel/vsel.php' ) ) {
-		require_once __DIR__ . '/activitypub/transformer/vs-event.php';
-		$transformers_manager->register( new \VS_Event() );
-	// }
+	require_once __DIR__ . '/activitypub/transformer/class-vs-event.php';
+	$transformers_manager->register( new \VS_Event() );
 }
 
+add_filter(
+	'activitypub_json_context',
+	function ( $context ) {
+		$context[2]['commentsEnabled'] = array(
+			'@id'   => 'pt:commentsEnabled',
+			'@type' => 'sc:Boolean',
+		);
+		return $context;
+	},
+	10,
+	2
+);
+
 add_action( 'activitypub_transformers_register', 'register_event_transformers' );
diff --git a/activitypub/object/class-event.php b/activitypub/object/class-event.php
new file mode 100644
index 0000000..49e175f
--- /dev/null
+++ b/activitypub/object/class-event.php
@@ -0,0 +1,38 @@
+<?php
+/**
+ * Event is an implementation of one of the
+ * Activity Streams Event object type
+ *
+ * @package activity-event-transformers
+ */
+
+/**
+ * Event is an implementation of one of the
+ * Activity Streams Event object type
+ *
+ * The Object is the primary base type for the Activity Streams
+ * vocabulary.
+ *
+ * @see https://www.w3.org/TR/activitystreams-vocabulary/#dfn-event
+ */
+class Event extends \Activitypub\Activity\Base_Object {
+	/**
+	 * Event is an implementation of one of the
+	 * Activity Streams
+	 *
+	 * @var string
+	 */
+	protected $type = 'Event';
+
+	/**
+	 * Extension invented by PeerTube whether comments/replies are <enabled>
+	 * Mobilizon also implemented this as a fallback to their own
+	 * repliesModerationOption.
+	 *
+	 * @see https://docs.joinpeertube.org/api/activitypub#video
+	 * @see https://docs.joinmobilizon.org/contribute/activity_pub/
+	 *
+	 * @var bool
+	 */
+	protected $comments_enabled;
+}
diff --git a/activitypub/transformer/tribe.php b/activitypub/transformer/class-tribe.php
similarity index 90%
rename from activitypub/transformer/tribe.php
rename to activitypub/transformer/class-tribe.php
index 4902c1a..0e0ba62 100644
--- a/activitypub/transformer/tribe.php
+++ b/activitypub/transformer/class-tribe.php
@@ -1,4 +1,10 @@
 <?php
+/**
+ * ActivityPub Tribe Transformer
+ *
+ * @package activity-event-transformers
+ */
+
 if ( ! defined( 'ABSPATH' ) ) {
 	exit; // Exit if accessed directly.
 }
@@ -57,7 +63,6 @@ class Tribe extends \Activitypub\Transformer\Base {
 	 * @return array Widget categories.
 	 */
 	public function get_supported_post_types() {
-		return [ 'tribe_events' ];
+		return array( 'tribe_events' );
 	}
-
 }
diff --git a/activitypub/transformer/vs-event.php b/activitypub/transformer/class-vs-event.php
similarity index 83%
rename from activitypub/transformer/vs-event.php
rename to activitypub/transformer/class-vs-event.php
index 681ecf2..0449ddc 100644
--- a/activitypub/transformer/vs-event.php
+++ b/activitypub/transformer/class-vs-event.php
@@ -1,4 +1,12 @@
 <?php
+/**
+ * ActivityPub Transformer for VS Event.
+ *
+ * @package activity-event-transformers
+ */
+
+require_once __DIR__ . '/../object/class-event.php';
+
 use Activitypub\Activity\Base_Object;
 use function Activitypub\get_rest_url_by_path;
 
@@ -7,12 +15,11 @@ if ( ! defined( 'ABSPATH' ) ) {
 }
 
 /**
- * ActivityPub Tribe Transformer
+ * ActivityPub Transformer for VS Event
  *
  * @since 1.0.0
  */
 class VS_Event extends \Activitypub\Transformer\Base {
-
 	/**
 	 * Get widget name.
 	 *
@@ -60,11 +67,14 @@ class VS_Event extends \Activitypub\Transformer\Base {
 	 * @return array Widget categories.
 	 */
 	public function get_supported_post_types() {
-		return [ 'event' ];
+		return array( 'event' );
 	}
 
 	/**
-	 * Get the event location
+	 * Get the event location.
+	 *
+	 * @param int $post_id The WordPress post ID.
+	 * @returns array The Place.
 	 */
 	public function get_event_location( $post_id ) {
 		$object = new Base_Object();
@@ -74,6 +84,17 @@ class VS_Event extends \Activitypub\Transformer\Base {
 		return $array;
 	}
 
+	/**
+	 * Test
+	 *
+	 * @param string $context context.
+	 * @return string $context context.
+	 */
+	private function add_pt_comments_enabled_context( $context ) {
+		$test = $context;
+		return $context;
+	}
+
 	/**
 	 * Transforms the VS Event WP_Post object to an ActivityPub Event Object
 	 *
@@ -83,7 +104,7 @@ class VS_Event extends \Activitypub\Transformer\Base {
 	 */
 	public function to_object() {
 		$wp_post = $this->wp_post;
-		$object  = new Base_Object();
+		$object  = new Event();
 
 		$object->set_id( $this->get_id() );
 		$object->set_url( $this->get_url() );
@@ -121,6 +142,9 @@ class VS_Event extends \Activitypub\Transformer\Base {
 		$location = get_post_meta( $wp_post->ID, 'event-link', true );
 		$object->set_location( $this->get_event_location( $wp_post->ID ) );
 
+		$is_open_for_comments = comments_open( $wp_post->ID );
+		$object->set_comments_enabled( $is_open_for_comments );
+
 		$object->set_to(
 			array(
 				'https://www.w3.org/ns/activitystreams#Public',
@@ -136,5 +160,4 @@ class VS_Event extends \Activitypub\Transformer\Base {
 
 		return $object;
 	}
-
 }