diff --git a/comfy_api_nodes/apis/client.py b/comfy_api_nodes/apis/client.py
index 1e350e0ec..cc135ad0a 100644
--- a/comfy_api_nodes/apis/client.py
+++ b/comfy_api_nodes/apis/client.py
@@ -250,10 +250,14 @@ class ApiClient:
         data: Dict[str, Any],
         files: Dict[str, Any],
         headers: Optional[Dict[str, str]] = None,
+        multipart_parser = None,
     ) -> Dict[str, Any]:
         if headers and "Content-Type" in headers:
             del headers["Content-Type"]
 
+        if multipart_parser:
+            data = multipart_parser(data)
+
         return {
             "data": data,
             "files": files,