diff --git a/lang_agent/front_api/build_server_utils.py b/lang_agent/front_api/build_server_utils.py
index 05314f3..0897c9a 100644
--- a/lang_agent/front_api/build_server_utils.py
+++ b/lang_agent/front_api/build_server_utils.py
@@ -11,6 +11,16 @@ def opt_to_config(save_path:str, *nargs):
     subprocess.run(["python", "--save-path", save_path, *nargs])
 
 
+def _build_and_load_pipeline_config(pipeline_id: str,
+                                    pipeline_config_dir: str,
+                                    cmd: List[str]):
+    save_config_f = osp.join(pipeline_config_dir, f"{pipeline_id}.yml")
+    opt_to_config(save_config_f, *cmd)
+
+    # TODO: think if returning the built pipeline is better or just the config obj for front_api
+    return load_tyro_conf(save_config_f)
+
+
 def update_pipeline_registry(pipeline_id:str, 
                              prompt_set:str,
                              registry_f:str="configs/pipeline_registry.json"):
@@ -30,40 +40,6 @@ def update_pipeline_registry(pipeline_id:str,
         json.dump(registry, f, indent=4)
 
 
-
-# def build_route(pipeline_id:str,
-#                 prompt_set:str,
-#                 tool_keys:List[str],
-#                 port:str,
-#                 api_key: str,
-#                 fast_auth_keys: Optional[str] = None,
-#                 entry_pnt:str="fastapi_server/server_dashscope.py",
-#                 llm_name:str="qwen-plus"):
-#     cmd = [
-#         "python", entry_pnt,
-#         "--port", str(port),
-#         "route",            # ------------
-#         "--llm-name", llm_name,
-#         "--api-key", api_key,
-#         "--pipeline-id", pipeline_id,
-#         "--prompt-set-id", prompt_set,
-#         "tool_node",        # ------------
-#         "--llm-name", llm_name,
-#         "--api-key", api_key,
-#         "--pipeline-id", pipeline_id,
-#         "--prompt-set-id", prompt_set,
-#         ]
-#     if tool_keys:
-#         cmd.extend(
-#             ["--tool-manager-config.client-tool-manager.tool-keys", *tool_keys]
-#         )
-#     env: Dict[str, str] = os.environ.copy()
-#     if fast_auth_keys:
-#         env["FAST_AUTH_KEYS"] = fast_auth_keys
-#     sv_prc = subprocess.Popen(cmd, env=env)
-
-#     return sv_prc, f"http://127.0.0.1:{port}/api/"
-
 def build_route(pipeline_id:str,
                 prompt_set:str,
                 tool_keys:List[str],
@@ -90,26 +66,18 @@ def build_route(pipeline_id:str,
             ["--tool-manager-config.client-tool-manager.tool-keys", *tool_keys]
         )
 
-    save_config_f = osp.join(pipeline_config_dir, f"{pipeline_id}.yml")
-    opt_to_config(save_config_f, *cmd)
-
-    # TODO: think if returning the built pipeline is better or just the config obj for front_api
-    return load_tyro_conf(save_config_f)
-
-
+    return _build_and_load_pipeline_config(pipeline_id, pipeline_config_dir, cmd)
 
 
 def build_react(pipeline_id:str,
                 prompt_set:str,
                 tool_keys:List[str],
-                port:str,
                 api_key: str,
-                fast_auth_keys: Optional[str] = None,
                 entry_pnt:str="fastapi_server/server_dashscope.py",
-                llm_name:str="qwen-plus"):
+                llm_name:str="qwen-plus",
+                pipeline_config_dir="configs/pipelines"):
     cmd = [
         "python", entry_pnt,
-        "--port", str(port),
         "react",            # ------------
         "--llm-name", llm_name,
         "--api-key", api_key,
@@ -120,12 +88,9 @@ def build_react(pipeline_id:str,
         cmd.extend(
             ["--tool-manager-config.client-tool-manager.tool-keys", *tool_keys]
         )
-    env: Dict[str, str] = os.environ.copy()
-    if fast_auth_keys:
-        env["FAST_AUTH_KEYS"] = fast_auth_keys
-    sv_prc = subprocess.Popen(cmd, env=env)
 
-    return sv_prc, f"http://127.0.0.1:{port}/api/"
+    return _build_and_load_pipeline_config(pipeline_id, pipeline_config_dir, cmd)
+
 
 # {pipeline_id: build_function}
 GRAPH_BUILD_FNCS = {