diff --git a/server.py b/server.py
index 317f71c..222cf2d 100644
--- a/server.py
+++ b/server.py
@@ -651,6 +651,7 @@ class AssetCreate(BaseModel):
     is_disney: Optional[bool] = None
     keys: Optional[List[AssetKey]] = []
     badges: Optional[List[str]] = []
+    dex_report_date: Optional[str] = None
 
 
 class AssetUpdate(BaseModel):
@@ -889,6 +890,7 @@ def _build_asset_insert(body: AssetCreate, machine_id: str, name: str):
         "room", "trailer_number", "walking_directions", "map_link",
         "parking_location", "photo_path", "customer_id", "location_id",
         "assigned_to", "latitude", "longitude", "geofence_radius_meters", "is_disney",
+        "dex_report_date",
     ]
     values = (
         machine_id, body.serial_number or "", name, body.description or "",
@@ -902,6 +904,7 @@ def _build_asset_insert(body: AssetCreate, machine_id: str, name: str):
         body.latitude, body.longitude,
         body.geofence_radius_meters if body.geofence_radius_meters is not None else 50,
         body.is_disney if body.is_disney is not None else None,
+        body.dex_report_date,
     )
     return columns, values
 
diff --git a/tests/test_server.py b/tests/test_server.py
index 262e933..0ecde18 100644
--- a/tests/test_server.py
+++ b/tests/test_server.py
@@ -1777,6 +1777,15 @@ class TestListAssetsExtendedFilters:
         assert len(data) == 1
         assert data[0]["name"] == "Match"
 
+    def test_list_assets_filter_no_dex_days(self, client):
+        """no_dex_days=N returns assets with no dex report or older than N days."""
+        client.post("/api/assets", json={"machine_id": "DEX1", "name": "HasDex", "dex_report_date": "2026-05-23"})
+        client.post("/api/assets", json={"machine_id": "DEX2", "name": "NoDex"})
+        r = client.get("/api/assets?no_dex_days=5")
+        data = r.json()
+        assert len(data) == 1
+        assert data[0]["name"] == "NoDex"
+
 
 # ─── Phase C: Users API ──────────────────────────────────────────────────