diff --git a/api/services/external_knowledge_service.py b/api/services/external_knowledge_service.py
index b6ba3bafea..5cd3b471f9 100644
--- a/api/services/external_knowledge_service.py
+++ b/api/services/external_knowledge_service.py
@@ -88,9 +88,9 @@ class ExternalDatasetService:
             else:
                 raise ValueError(f"invalid endpoint: {endpoint}")
         try:
-            response = httpx.post(endpoint, headers={"Authorization": f"Bearer {api_key}"})
-        except Exception:
-            raise ValueError(f"failed to connect to the endpoint: {endpoint}")
+            response = ssrf_proxy.post(endpoint, headers={"Authorization": f"Bearer {api_key}"})
+        except Exception as e:
+            raise ValueError(f"failed to connect to the endpoint: {endpoint}") from e
         if response.status_code == 502:
             raise ValueError(f"Bad Gateway: failed to connect to the endpoint: {endpoint}")
         if response.status_code == 404: