diff --git a/includes/class-activitypub-inbox.php b/includes/class-activitypub-inbox.php
new file mode 100644
index 0000000..5496bab
--- /dev/null
+++ b/includes/class-activitypub-inbox.php
@@ -0,0 +1,64 @@
+<?php
+/**
+ * ActivityPub Outbox Class
+ *
+ * @author Matthias Pfefferle
+ */
+class Activitypub_Inbox {
+	/**
+	 * Register routes
+	 */
+	public static function register_routes() {
+		register_rest_route(
+			'activitypub/1.0', '/inbox', array(
+				array(
+					'methods'  => WP_REST_Server::EDITABLE,
+					'callback' => array( 'Activitypub_Inbox', 'shared_edit' ),
+				),
+			)
+		);
+
+		register_rest_route(
+			'activitypub/1.0', '/users/(?P<id>\d+)/inbox', array(
+				array(
+					'methods'  => WP_REST_Server::EDITABLE,
+					'callback' => array( 'Activitypub_Inbox', 'user_edit' ),
+					'args'     => self::request_parameters(),
+				),
+			)
+		);
+	}
+
+	public static function user_edit( $request ) {
+		$author_id = $request->get_param( 'id' );
+		$author    = get_user_by( 'ID', $author_id );
+
+		$data = json_decode( $request->get_body(), true );
+
+		if ( ! is_array( $data ) || ! array_key_exists( 'type', $data ) ) {
+			return new WP_Error( 'rest_invalid_data', __( 'Invalid payload', 'activitypub' ), array( 'status' => 422 ) );
+		}
+
+		return new WP_REST_Response( $data );
+	}
+
+	public static function shared_edit( $request ) {
+		// Create the response object
+		return new WP_Error( 'rest_not_implemented', __( 'This method is not yet implemented', 'activitypub' ), array( 'status' => 501 ) );
+	}
+
+	public static function request_parameters() {
+		$params = array();
+
+		$params['page'] = array(
+			'type' => 'integer',
+		);
+
+		$params['id'] = array(
+			'required' => true,
+			'type' => 'integer',
+		);
+
+		return $params;
+	}
+}