diff --git a/app/Services/FlowTester/ResponseValidator.php b/app/Services/FlowTester/ResponseValidator.php
index b55cefd9..a2a8ab61 100644
--- a/app/Services/FlowTester/ResponseValidator.php
+++ b/app/Services/FlowTester/ResponseValidator.php
@@ -82,6 +82,10 @@ private function getValueByPath(array $data, string $path): mixed
             return $data;
         }
 
+        // JSONPath 배열 인덱스 표기법 [n]을 Laravel dot notation .n으로 변환
+        // 예: data.data[0].id → data.data.0.id
+        $path = preg_replace('/\[(\d+)\]/', '.$1', $path);
+
         return data_get($data, $path);
     }