diff --git a/litellm/realtime_api/main.py b/litellm/realtime_api/main.py
index 59aa63eb8a5..336fb3cef12 100644
--- a/litellm/realtime_api/main.py
+++ b/litellm/realtime_api/main.py
@@ -636,9 +636,15 @@ async def _realtime_health_check(
     import websockets
 
     resolved_params: Final = _model_params_with_stored_credentials(model_params or _EMPTY_MODEL_PARAMS)
-    resolved_api_key: Final = cast(str | None, api_key or resolved_params.get("api_key"))
-    resolved_api_base: Final = cast(str | None, api_base or resolved_params.get("api_base"))
-    resolved_api_version: Final = cast(str | None, api_version or resolved_params.get("api_version"))
+    resolved_api_key: Final = cast(  # cast-ok: provider parameters expose optional string credentials
+        str | None, api_key or resolved_params.get("api_key")
+    )
+    resolved_api_base: Final = cast(  # cast-ok: provider parameters expose optional string endpoints
+        str | None, api_base or resolved_params.get("api_base")
+    )
+    resolved_api_version: Final = cast(  # cast-ok: provider parameters expose optional string versions
+        str | None, api_version or resolved_params.get("api_version")
+    )
     url: str | None = None
     auth_headers: Final = _realtime_health_check_auth_headers(
         custom_llm_provider=custom_llm_provider,