diff --git a/api_error.go b/api_error.go
index 04bef96..a13c5f1 100644
--- a/api_error.go
+++ b/api_error.go
@@ -1,5 +1,6 @@
 package point_tools
 
+// ApiError represents the typical error object in API response
 type ApiError struct {
 	Code    int    `json:"code"`
 	Message string `json:"message"`