diff --git a/controllers/ipaddress/GET.php b/controllers/ipaddress/GET.php
new file mode 100644
index 0000000..83a0d56
--- /dev/null
+++ b/controllers/ipaddress/GET.php
@@ -0,0 +1,7 @@
+<?php
+
+return function (array $context) {
+    $context["renderer"]([
+        "address" => $_SERVER['REMOTE_ADDR'],
+    ]);
+};
diff --git a/controllers/routes.php b/controllers/routes.php
index 832d28f..cc9f87c 100644
--- a/controllers/routes.php
+++ b/controllers/routes.php
@@ -10,5 +10,6 @@ function fromController(string $path) {
 
 return function(Router $router) {
     $router->addRoute(GET, "/", fromController("/GET"));
-    $router->addRoute(GET, "/test", useRenderer(fromController("/test/GET"), "JSON"));
+    $router->addRoute(GET, "/test", useRenderer(fromController("/test/GET")));
+    $router->addRoute(GET, "/ipaddress", useRenderer(fromController("/ipaddress/GET")));
 };
diff --git a/core.php b/core.php
index d49d312..a6019cc 100644
--- a/core.php
+++ b/core.php
@@ -4,8 +4,6 @@ const ROOT = __DIR__;
 
 define("MAINTENANCE_MODE", require(ROOT . "/maintenance.php"));
 
-require_once(ROOT . "/utils/arrays.php");
-
 if (MAINTENANCE_MODE) {
     require(ROOT . "./templates/maintenance.php");
 } else {
diff --git a/middleware/renderer.php b/middleware/renderer.php
index f8971a1..defc6d4 100644
--- a/middleware/renderer.php
+++ b/middleware/renderer.php
@@ -1,6 +1,8 @@
 <?php
 
-function useRenderer($handler, string $default, string $query_param = "format") {
+require_once(ROOT . "/utils/arrays.php");
+
+function useRenderer($handler, string $default = "JSON", string $query_param = "format") {
     return function (array $context) use ($handler, $default, $query_param) {
         $rendererMap = require(ROOT . "/renderer/renderer.php");
 
diff --git a/router/Router.php b/router/Router.php
index 4d11921..a0253ac 100644
--- a/router/Router.php
+++ b/router/Router.php
@@ -1,5 +1,7 @@
 <?php
 
+require_once(ROOT . "/utils/arrays.php");
+
 const GET = "GET";
 const POST = "POST";
 const PUT = "PUT";