diff --git a/app/controllers/api/functions.php b/app/controllers/api/functions.php
index 443260ea90..f70895ad60 100644
--- a/app/controllers/api/functions.php
+++ b/app/controllers/api/functions.php
@@ -436,8 +436,8 @@ App::get('/v1/functions/runtimes')
                 continue;
             }
 
-            $runtimes[$key]['$id'] = $key;
-            $allowed[] = $runtimes[$key];
+            $runtime['$id'] = $key;
+            $allowed[] = $runtime;
         }
 
         $response->dynamic(new Document([
diff --git a/src/Appwrite/Utopia/Response/Model/Runtime.php b/src/Appwrite/Utopia/Response/Model/Runtime.php
index 8bc42cb418..3c328c4d40 100644
--- a/src/Appwrite/Utopia/Response/Model/Runtime.php
+++ b/src/Appwrite/Utopia/Response/Model/Runtime.php
@@ -16,6 +16,12 @@ class Runtime extends Model
                 'default' => '',
                 'example' => 'python-3.8',
             ])
+            ->addRule('key', [
+                'type' => self::TYPE_STRING,
+                'description' => 'Parent runtime key.',
+                'default' => '',
+                'example' => 'python',
+            ])
             ->addRule('name', [
                 'type' => self::TYPE_STRING,
                 'description' => 'Runtime Name.',
diff --git a/tests/e2e/Services/Functions/FunctionsCustomServerTest.php b/tests/e2e/Services/Functions/FunctionsCustomServerTest.php
index e3148752c8..3e6a00a4cb 100644
--- a/tests/e2e/Services/Functions/FunctionsCustomServerTest.php
+++ b/tests/e2e/Services/Functions/FunctionsCustomServerTest.php
@@ -1412,6 +1412,7 @@ class FunctionsCustomServerTest extends Scope
 
         $this->assertArrayHasKey('$id', $runtime);
         $this->assertArrayHasKey('name', $runtime);
+        $this->assertArrayHasKey('key', $runtime);
         $this->assertArrayHasKey('version', $runtime);
         $this->assertArrayHasKey('logo', $runtime);
         $this->assertArrayHasKey('image', $runtime);