diff --git a/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py b/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py
index d93c9ca22a..fb44281cad 100644
--- a/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py
+++ b/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py
@@ -700,7 +700,8 @@ async def bedrock_proxy_route(
     # Add or update query parameters
     from litellm.llms.bedrock.chat import BedrockConverseLLM
 
-    credentials: Credentials = BedrockConverseLLM().get_credentials()
+    bedrock_llm = BedrockConverseLLM()
+    credentials: Credentials = bedrock_llm.get_credentials()  # type: ignore
     sigv4 = SigV4Auth(credentials, "bedrock", aws_region_name)
     headers = {"Content-Type": "application/json"}
     # Assuming the body contains JSON data, parse it
@@ -1293,18 +1294,22 @@ async def vertex_ai_live_websocket_passthrough(
         )
 
     resolved_project = vertex_project
-    resolved_location = vertex_location
+    resolved_location: Optional[str] = vertex_location
     credentials_value: Optional[str] = None
 
     if vertex_credentials_config is not None:
         resolved_project = resolved_project or vertex_credentials_config.vertex_project
-        resolved_location = (
+        temp_location = (
             resolved_location or vertex_credentials_config.vertex_location
         )
         # Ensure resolved_location is a string
-        if isinstance(resolved_location, dict):
-            resolved_location = str(resolved_location)
-        credentials_value = vertex_credentials_config.vertex_credentials
+        if isinstance(temp_location, dict):
+            resolved_location = str(temp_location)
+        elif temp_location is not None:
+            resolved_location = str(temp_location)
+        else:
+            resolved_location = None
+        credentials_value = str(vertex_credentials_config.vertex_credentials) if vertex_credentials_config.vertex_credentials is not None else None
 
     try:
         resolved_location = resolved_location or (
diff --git a/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py b/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py
index 749df08d4b..b12c2814bc 100644
--- a/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py
+++ b/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py
@@ -506,7 +506,7 @@ class HttpPassThroughEndpointHelpers(BasePassthroughUtils):
 
         kwargs = {
             "litellm_params": {
-                **litellm_params_in_body,
+                **litellm_params_in_body,  # type: ignore
                 "metadata": _metadata,
                 "proxy_server_request": {
                     "url": str(request.url),
@@ -1126,7 +1126,7 @@ async def websocket_passthrough_request(  # noqa: PLR0915
     # Create a dummy request object for WebSocket connections to maintain compatibility
     # with the existing _init_kwargs_for_pass_through_endpoint function
     class DummyRequest:
-        def __init__(self, url: str, method: str = "WEBSOCKET", headers: dict = None):
+        def __init__(self, url: str, method: str = "WEBSOCKET", headers: Optional[dict] = None):
             self.url = url
             self.method = method
             self.headers = headers or {}
@@ -1146,7 +1146,7 @@ async def websocket_passthrough_request(  # noqa: PLR0915
         _parsed_body={},  # WebSocket doesn't have a traditional request body
         passthrough_logging_payload=passthrough_logging_payload,
         litellm_call_id=litellm_call_id,
-        request=dummy_request,
+        request=dummy_request,  # type: ignore
         logging_obj=logging_obj,
     )
 
@@ -1379,8 +1379,8 @@ async def websocket_passthrough_request(  # noqa: PLR0915
             end_time = datetime.now()
 
             # Update passthrough logging payload with response data
-            passthrough_logging_payload["response_body"] = websocket_messages
-            passthrough_logging_payload["end_time"] = end_time
+            passthrough_logging_payload["response_body"] = websocket_messages  # type: ignore
+            passthrough_logging_payload["end_time"] = end_time  # type: ignore
 
             # Remove logging_obj from kwargs to avoid duplicate keyword argument
             success_kwargs = kwargs.copy()
@@ -1419,9 +1419,9 @@ async def websocket_passthrough_request(  # noqa: PLR0915
             # Use the same success handler as HTTP passthrough endpoints
             asyncio.create_task(
                 pass_through_endpoint_logging.pass_through_async_success_handler(
-                    httpx_response=mock_response,  # Use mock response for WebSocket
-                    response_body=websocket_messages,
-                    url_route=endpoint,
+                    httpx_response=mock_response,  # type: ignore
+                    response_body=websocket_messages,  # type: ignore
+                    url_route=endpoint or "",
                     result="websocket_connection_successful",
                     start_time=start_time,
                     end_time=end_time,
@@ -1437,7 +1437,7 @@ async def websocket_passthrough_request(  # noqa: PLR0915
                 await proxy_logging_obj.post_call_success_hook(
                     data={},
                     user_api_key_dict=user_api_key_dict,
-                    response={"status": "websocket_connection_successful"},
+                    response={"status": "websocket_connection_successful"},  # type: ignore
                 )
 
     except InvalidStatus as exc: