diff --git a/src/dashboard/api.py b/src/dashboard/api.py
index ff87541..1a43fab 100644
--- a/src/dashboard/api.py
+++ b/src/dashboard/api.py
@@ -649,6 +649,9 @@ async def get_signals():
                         status_code=503,
                         detail="No signals available from protocol servers. Please check server connectivity."
                     )
+            except HTTPException:
+                # Re-raise HTTP exceptions directly
+                raise
             except Exception as e:
                 logger.error("failed_to_get_protocol_data", error=str(e))
                 raise HTTPException(