diff --git a/backend/api/config.py b/backend/api/config.py
index fa4a889..e85354f 100644
--- a/backend/api/config.py
+++ b/backend/api/config.py
@@ -280,10 +280,15 @@ async def fetch_room_categories(
     """Fetch room categories from Newbook API site_list endpoint"""
     import httpx
 
-    api_key = await _get_config_value(db, "newbook_api_key")
-    username = await _get_config_value(db, "newbook_username")
-    password = await _get_config_value(db, "newbook_password")
-    region = await _get_config_value(db, "newbook_region")
+    from services.central_settings import get_newbook_credentials
+    central = await get_newbook_credentials()
+    if central:
+        api_key, username, password, region = central["api_key"], central["username"], central["password"], central["region"]
+    else:
+        api_key = await _get_config_value(db, "newbook_api_key")
+        username = await _get_config_value(db, "newbook_username")
+        password = await _get_config_value(db, "newbook_password")
+        region = await _get_config_value(db, "newbook_region")
 
     if not all([api_key, username, password, region]):
         raise HTTPException(status_code=400, detail="Newbook credentials not configured")
@@ -468,10 +473,15 @@ async def fetch_gl_accounts(
     """Fetch GL accounts from Newbook API gl_account_list endpoint"""
     import httpx
 
-    api_key = await _get_config_value(db, "newbook_api_key")
-    username = await _get_config_value(db, "newbook_username")
-    password = await _get_config_value(db, "newbook_password")
-    region = await _get_config_value(db, "newbook_region")
+    from services.central_settings import get_newbook_credentials
+    central = await get_newbook_credentials()
+    if central:
+        api_key, username, password, region = central["api_key"], central["username"], central["password"], central["region"]
+    else:
+        api_key = await _get_config_value(db, "newbook_api_key")
+        username = await _get_config_value(db, "newbook_username")
+        password = await _get_config_value(db, "newbook_password")
+        region = await _get_config_value(db, "newbook_region")
 
     if not all([api_key, username, password, region]):
         raise HTTPException(status_code=400, detail="Newbook credentials not configured")