all endpoints are now working

src/Module/Following.php

@@ -0,0 +1,38 @@
+<?php
+/**
+ * @file src/Module/Following.php
+ */
+namespace Friendica\Module;
+
+use Friendica\BaseModule;
+use Friendica\Protocol\ActivityPub;
+use Friendica\Core\System;
+use Friendica\Model\User;
+
+/**
+ * ActivityPub Following
+ */
+class Following extends BaseModule
+{
+	public static function init()
+	{
+		$a = self::getApp();
+
+		if (empty($a->argv[1])) {
+			System::httpExit(404);
+		}
+
+		$owner = User::getOwnerDataByNick($a->argv[1]);
+		if (empty($owner)) {
+			System::httpExit(404);
+		}
+
+		$page = defaults($_REQUEST, 'page', null);
+
+		$Following = ActivityPub::getFollowing($owner, $page);
+
+		header('Content-Type: application/activity+json');
+		echo json_encode($Following);
+		exit();
+	}
+}