diff --git a/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py b/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py
index 2fdb289e3ce..359d25b7425 100644
--- a/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py
+++ b/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py
@@ -672,6 +672,8 @@ async def _base_vertex_proxy_route(
         location=vertex_location,
     )
 
+    verbose_proxy_logger.debug(f"vertex_credentials: {vertex_credentials}")
+
     base_target_url = get_vertex_pass_through_handler.get_default_base_target_url(
         vertex_location
     )
diff --git a/litellm/proxy/pass_through_endpoints/passthrough_endpoint_router.py b/litellm/proxy/pass_through_endpoints/passthrough_endpoint_router.py
index 520bda177b9..e14336536c8 100644
--- a/litellm/proxy/pass_through_endpoints/passthrough_endpoint_router.py
+++ b/litellm/proxy/pass_through_endpoints/passthrough_endpoint_router.py
@@ -116,6 +116,10 @@ class PassthroughEndpointRouter:
         Add the vertex credentials for the given project-id, location
         """
 
+        verbose_router_logger.debug(
+            f"Adding vertex credentials for project_id: {project_id}, location: {location}, vertex_credentials length: {len(vertex_credentials)}"
+        )
+
         deployment_key = self._get_deployment_key(
             project_id=project_id,
             location=location,