diff --git a/backend/app/api/graph.py b/backend/app/api/graph.py
index 1886ed6b..9dbcc927 100644
--- a/backend/app/api/graph.py
+++ b/backend/app/api/graph.py
@@ -282,6 +282,7 @@ def build_graph():
     """
     try:
         logger.info("=== Starting graph build ===")
+        logger.info(f"GRAPH_BACKEND={Config.GRAPH_BACKEND!r} ZEP_API_KEY={'set' if Config.ZEP_API_KEY else 'unset'} NEO4J_PASSWORD={'set' if Config.NEO4J_PASSWORD else 'unset'}")
 
         # Check configuration
         errors = Config.get_graph_config_errors()