diff --git a/routes/reslevis.py b/routes/reslevis.py
index 43b2e0a..d9cc507 100644
--- a/routes/reslevis.py
+++ b/routes/reslevis.py
@@ -1,4 +1,6 @@
-from fastapi import APIRouter, Depends, HTTPException
+from fastapi import APIRouter, Depends, HTTPException, Request
+import httpx
+import config_env
 from typing import List
 
 from schemas.reslevis import (
@@ -27,7 +29,35 @@ from logica_reslevis.tracker_zone import TrackerZoneJsonRepository
 
 from security import get_current_user
 
-router = APIRouter()
+#CORE SYNC
+CORE_BASE_URL = config_env.CORE_API_URL.rstrip("/")
+CORE_TIMEOUT = 2.0  # secondi
+
+async def sync_core_get(request: Request) -> None:
+    if request.method != "GET":
+        return
+
+    repo = CORE_GET_REPO_BY_PATH.get(request.url.path)
+    if repo is None:
+        return
+
+    try:
+        async with httpx.AsyncClient(timeout=CORE_TIMEOUT) as client:
+            resp = await client.get(
+                f"{CORE_BASE_URL}{request.url.path}",
+                params=request.query_params,
+            )
+
+        if 200 <= resp.status_code < 300:
+            data = resp.json()
+            if isinstance(data, list):
+                repo._write_all(data)  # aggiorna i file locali
+    except (httpx.RequestError, ValueError):
+        # CORE giù o risposta non valida -> uso il file locale
+        pass
+
+
+router = APIRouter(dependencies=[Depends(sync_core_get)])
 
 gateway_repo = GatewayJsonRepository()
 building_repo = BuildingJsonRepository()
@@ -40,6 +70,18 @@ alarm_repo = AlarmJsonRepository()
 track_repo = TrackJsonRepository()
 tracker_zone_repo = TrackerZoneJsonRepository()
 
+CORE_GET_REPO_BY_PATH = {
+    "/reslevis/getGateways": gateway_repo,
+    "/reslevis/getBuildings": building_repo,
+    "/reslevis/getFloors": floor_repo,
+    "/reslevis/getZones": zone_repo,
+    "/reslevis/getTrackers": tracker_repo,
+    "/reslevis/getTrackerZones": tracker_zone_repo,
+    "/reslevis/getTracks": track_repo,
+    "/reslevis/getOperators": operator_repo,
+    "/reslevis/getSubjects": subject_repo,
+}
+
 
 @router.get(
     "/getGateways",
@@ -103,10 +145,10 @@ def removeBuilding(building_id: str):
     tags=["Reslevis"],
     dependencies=[Depends(get_current_user)],
 )
+
 def getFloors():
     return floor_repo.list()
 
-
 @router.post("/postFloor", tags=["Reslevis"], dependencies=[Depends(get_current_user)])
 def postFloor(item: FloorItem):
     floor_repo.add(item)