diff --git a/src/memos/configs/vec_db.py b/src/memos/configs/vec_db.py
index b43298d9..ac06197a 100644
--- a/src/memos/configs/vec_db.py
+++ b/src/memos/configs/vec_db.py
@@ -27,6 +27,7 @@ class QdrantVecDBConfig(BaseVecDBConfig):
     host: str | None = Field(default=None, description="Host for Qdrant")
     port: int | None = Field(default=None, description="Port for Qdrant")
     path: str | None = Field(default=None, description="Path for Qdrant")
+    api_key: str | None = Field(default=None, description="Optional API key for Qdrant authentication")
 
     @model_validator(mode="after")
     def set_default_path(self):
diff --git a/src/memos/vec_dbs/qdrant.py b/src/memos/vec_dbs/qdrant.py
index a0ebf1d8..b8ca7c8d 100644
--- a/src/memos/vec_dbs/qdrant.py
+++ b/src/memos/vec_dbs/qdrant.py
@@ -33,9 +33,15 @@ def __init__(self, config: QdrantVecDBConfig):
                 "(e.g., via Docker: https://qdrant.tech/documentation/quickstart/)."
             )
 
-        self.client = QdrantClient(
-            host=self.config.host, port=self.config.port, path=self.config.path
-        )
+        client_kwargs = {
+            "host": self.config.host,
+            "port": self.config.port,
+            "path": self.config.path,
+        }
+        if self.config.api_key:
+            client_kwargs["api_key"] = self.config.api_key
+
+        self.client = QdrantClient(**client_kwargs)
         self.create_collection()
 
     def create_collection(self) -> None:
diff --git a/tests/configs/test_vec_db.py b/tests/configs/test_vec_db.py
index b41e775a..ec739460 100644
--- a/tests/configs/test_vec_db.py
+++ b/tests/configs/test_vec_db.py
@@ -40,7 +40,7 @@ def test_qdrant_vec_db_config():
         required_fields=[
             "collection_name",
         ],
-        optional_fields=["vector_dimension", "distance_metric", "host", "port", "path"],
+        optional_fields=["vector_dimension", "distance_metric", "host", "port", "path", "api_key"],
     )
 
     check_config_instantiation_valid(
diff --git a/tests/vec_dbs/test_qdrant.py b/tests/vec_dbs/test_qdrant.py
index 828240ae..519298c8 100644
--- a/tests/vec_dbs/test_qdrant.py
+++ b/tests/vec_dbs/test_qdrant.py
@@ -113,3 +113,31 @@ def test_get_all(vec_db):
     results = vec_db.get_all()
     assert len(results) == 1
     assert isinstance(results[0], VecDBItem)
+
+
+def test_client_receives_api_key():
+    from unittest.mock import patch
+    from memos import settings
+    from memos.configs.vec_db import VectorDBConfigFactory
+    from memos.vec_dbs.factory import VecDBFactory
+
+    api_key = "your_secure_api_key_here_change_in_production"
+    with patch("qdrant_client.QdrantClient") as mock_client:
+        cfg = VectorDBConfigFactory.model_validate(
+            {
+                "backend": "qdrant",
+                "config": {
+                    "collection_name": "test_collection",
+                    "vector_dimension": 4,
+                    "distance_metric": "cosine",
+                    "path": str(settings.MEMOS_DIR / "qdrant"),
+                    "api_key": api_key,
+                },
+            }
+        )
+        _ = VecDBFactory.from_config(cfg)
+
+        # Assert that QdrantClient was called with api_key keyword argument
+        assert mock_client.called
+        kwargs = mock_client.call_args.kwargs
+        assert kwargs.get("api_key") == api_key