diff --git a/src/llmtuner/api/app.py b/src/llmtuner/api/app.py
index 428d15de..26ee57ce 100644
--- a/src/llmtuner/api/app.py
+++ b/src/llmtuner/api/app.py
@@ -108,7 +108,7 @@ def create_app(chat_model: "ChatModel") -> "FastAPI":
         tool_list = request.tools
         if len(tool_list):
             try:
-                tools = json.dumps([tool_list[0]["function"]], ensure_ascii=False)
+                tools = json.dumps([tool["function"] for tool in tool_list], ensure_ascii=False)
             except Exception:
                 raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Invalid tools")
         else: