diff --git a/src/memos/api/handlers/memory_handler.py b/src/memos/api/handlers/memory_handler.py
index 83f51428c..dc72d0112 100644
--- a/src/memos/api/handlers/memory_handler.py
+++ b/src/memos/api/handlers/memory_handler.py
@@ -187,6 +187,9 @@ def handle_get_memories(
 
 
 def handle_delete_memories(delete_mem_req: DeleteMemoryRequest, naive_mem_cube: NaiveMemCube):
+    logger.info(
+        f"[Delete memory request] writable_cube_ids: {delete_mem_req.writable_cube_ids}, memory_ids: {delete_mem_req.memory_ids}"
+    )
     # Validate that only one of memory_ids, file_ids, or filter is provided
     provided_params = [
         delete_mem_req.memory_ids is not None,
@@ -201,7 +204,8 @@ def handle_delete_memories(delete_mem_req: DeleteMemoryRequest, naive_mem_cube:
 
     try:
         if delete_mem_req.memory_ids is not None:
-            naive_mem_cube.text_mem.delete(delete_mem_req.memory_ids)
+            for cube_id in delete_mem_req.writable_cube_ids:
+                naive_mem_cube.text_mem.delete(delete_mem_req.memory_ids, user_name=cube_id)
             if naive_mem_cube.pref_mem is not None:
                 naive_mem_cube.pref_mem.delete(delete_mem_req.memory_ids)
         elif delete_mem_req.file_ids is not None:
diff --git a/src/memos/api/product_models.py b/src/memos/api/product_models.py
index d2e7c5946..16ae86638 100644
--- a/src/memos/api/product_models.py
+++ b/src/memos/api/product_models.py
@@ -111,7 +111,7 @@ class ChatRequest(BaseRequest):
     )
 
     # ==== Extended capabilities ====
-    internet_search: bool = Field(True, description="Whether to use internet search")
+    internet_search: bool = Field(False, description="Whether to use internet search")
     threshold: float = Field(0.5, description="Threshold for filtering references")
 
     # ==== Backward compatibility ====
@@ -699,7 +699,7 @@ class APIChatCompleteRequest(BaseRequest):
     )
 
     # ==== Extended capabilities ====
-    internet_search: bool = Field(True, description="Whether to use internet search")
+    internet_search: bool = Field(False, description="Whether to use internet search")
     threshold: float = Field(0.5, description="Threshold for filtering references")
 
     # ==== Backward compatibility ====
@@ -728,6 +728,7 @@ class GetMemoryRequest(BaseRequest):
 class DeleteMemoryRequest(BaseRequest):
     """Request model for deleting memories."""
 
+    writable_cube_ids: list[str] = Field(..., description="Writable cube IDs")
     memory_ids: list[str] | None = Field(None, description="Memory IDs")
     file_ids: list[str] | None = Field(None, description="File IDs")
     filter: dict[str, Any] | None = Field(None, description="Filter for the memory")