diff --git a/backend/oasst_backend/exceptions.py b/backend/oasst_backend/exceptions.py
index f431b05b..7d4da6ef 100644
--- a/backend/oasst_backend/exceptions.py
+++ b/backend/oasst_backend/exceptions.py
@@ -18,6 +18,7 @@ class OasstErrorCode(IntEnum):
     DATABASE_URI_NOT_SET = 1
     API_CLIENT_NOT_AUTHORIZED = 2
     SERVER_ERROR = 3
+    TOO_MANY_REQUESTS = 429
 
     # 1000-2000: tasks endpoint
     TASK_INVALID_REQUEST_TYPE = 1000