diff --git a/backend/app/routers/global_devices.py b/backend/app/routers/global_devices.py
index f2fc6f0..183a7cb 100644
--- a/backend/app/routers/global_devices.py
+++ b/backend/app/routers/global_devices.py
@@ -1,9 +1,12 @@
 """Global devices endpoint — cross-object device listing with filters."""
 
+import logging
 from typing import Optional
 
-from fastapi import APIRouter, Depends
+from fastapi import APIRouter, Depends, Query
 from sqlalchemy import select
+
+logger = logging.getLogger(__name__)
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import selectinload
 
@@ -18,7 +21,7 @@ router = APIRouter(prefix="/api/v1/devices", tags=["devices-global"])
 
 @router.get("", response_model=list[DeviceRead])
 async def list_all_devices(
-    category: Optional[list[str]] = None,
+    category: Optional[list[str]] = Query(default=None),
     city: Optional[str] = None,
     client: Optional[str] = None,
     object_id: Optional[int] = None,
@@ -34,6 +37,8 @@ async def list_all_devices(
     - All bank terminals for a client: ?category=bank_terminal&client=Авангард
     - All devices in a city: ?city=Санкт-Петербург
     """
+    logger.info("list_all_devices called: category=%r city=%r client=%r object_id=%r status=%r", category, city, client, object_id, status)
+
     query = (
         select(Device)
         .join(Object, Device.object_id == Object.id)