diff --git a/include/neuron/errcodes.h b/include/neuron/errcodes.h
index d7ea6dc0..1abaea0c 100644
--- a/include/neuron/errcodes.h
+++ b/include/neuron/errcodes.h
@@ -46,16 +46,17 @@ typedef enum {
     NEU_ERR_DUPLICATE_PASSWORD       = 1013,
     NEU_ERR_COMMAND_EXECUTION_FAILED = 1014,
 
-    NEU_ERR_NODE_EXIST             = 2002,
-    NEU_ERR_NODE_NOT_EXIST         = 2003,
-    NEU_ERR_NODE_SETTING_INVALID   = 2004,
-    NEU_ERR_NODE_SETTING_NOT_FOUND = 2005,
-    NEU_ERR_NODE_NOT_READY         = 2006,
-    NEU_ERR_NODE_IS_RUNNING        = 2007,
-    NEU_ERR_NODE_NOT_RUNNING       = 2008,
-    NEU_ERR_NODE_IS_STOPED         = 2009,
-    NEU_ERR_NODE_NAME_TOO_LONG     = 2010,
-    NEU_ERR_NODE_NOT_ALLOW_DELETE  = 2011,
+    NEU_ERR_NODE_EXIST               = 2002,
+    NEU_ERR_NODE_NOT_EXIST           = 2003,
+    NEU_ERR_NODE_SETTING_INVALID     = 2004,
+    NEU_ERR_NODE_SETTING_NOT_FOUND   = 2005,
+    NEU_ERR_NODE_NOT_READY           = 2006,
+    NEU_ERR_NODE_IS_RUNNING          = 2007,
+    NEU_ERR_NODE_NOT_RUNNING         = 2008,
+    NEU_ERR_NODE_IS_STOPED           = 2009,
+    NEU_ERR_NODE_NAME_TOO_LONG       = 2010,
+    NEU_ERR_NODE_NOT_ALLOW_DELETE    = 2011,
+    NEU_ERR_NODE_NOT_ALLOW_SUBSCRIBE = 2012,
 
     NEU_ERR_GROUP_ALREADY_SUBSCRIBED = 2101,
     NEU_ERR_GROUP_NOT_SUBSCRIBE      = 2102,
diff --git a/src/core/manager_internal.c b/src/core/manager_internal.c
index ccd43e88..f5f3dca9 100644
--- a/src/core/manager_internal.c
+++ b/src/core/manager_internal.c
@@ -192,6 +192,11 @@ int neu_manager_subscribe(neu_manager_t *manager, const char *app,
         return NEU_ERR_NODE_NOT_EXIST;
     }
 
+    if (0 == strcmp(app, "monitor")) {
+        // filter out monitor node
+        return NEU_ERR_NODE_NOT_ALLOW_SUBSCRIBE;
+    }
+
     ret =
         neu_adapter_driver_group_exist((neu_adapter_driver_t *) adapter, group);
     if (ret != NEU_ERR_SUCCESS) {
diff --git a/src/utils/http.c b/src/utils/http.c
index 3d253ae0..b150ce70 100644
--- a/src/utils/http.c
+++ b/src/utils/http.c
@@ -314,6 +314,7 @@ int neu_http_response(nng_aio *aio, neu_err_code_e code, char *content)
     case NEU_ERR_BODY_IS_WRONG:
     case NEU_ERR_PARAM_IS_WRONG:
     case NEU_ERR_NODE_SETTING_INVALID:
+    case NEU_ERR_NODE_NOT_ALLOW_SUBSCRIBE:
     case NEU_ERR_LIBRARY_INFO_INVALID:
     case NEU_ERR_LICENSE_INVALID:
     case NEU_ERR_GROUP_PARAMETER_INVALID: