diff --git a/wally/suits/io/rpc_plugin.pyi b/wally/suits/io/rpc_plugin.pyi
new file mode 100644
index 0000000..1155007
--- /dev/null
+++ b/wally/suits/io/rpc_plugin.pyi
@@ -0,0 +1,8 @@
+from typing import Any, Optional, Dict, List
+
+def rpc_run_fio(cfg: Dict[str, str]) -> Any: ...
+def rpc_check_file_prefilled(path: str, used_size_mb: int) -> bool: ...
+def rpc_prefill_test_files(files: Dict[str, int], force: bool = False, fio_path: str = 'fio') -> Optional[int]: ...
+
+
+def load_fio_log_file(fname: str) -> List[float]: ...