adding #2

composer.json

@@ -1,6 +1,6 @@
 {
     "name": "tentakelfabrik/pirectus",
-    "version": "0.1.1",
+    "version": "0.1.3",
     "type": "library",
     "license": "MIT",
     "authors": [

src/Pirectus.php

@@ -44,7 +44,7 @@ class Pirectus
     public function items(string $name)
     {
         $query = [
-            'endpoint' => '/items/'.$name,
+            'endpoint' => 'items/'.$name,
             'parameters' => []
         ];
 

src/QueryBuilder/ItemsQueryBuilder.php

@@ -222,7 +222,7 @@ class ItemsQueryBuilder extends AbstractQueryBuilder
       */
      public function aliases(string $field, string $alias)
      {
-         $this->query['parameters']['alias'][$field] = $alias;
+         $this->query['parameters']['alias'][$alias] = $field;
 
          return $this;
      }