Steam will scan every file, compare it to the master manifest, and automatically download any missing or corrupted DLLs—including steam_api.dll . This is the gold standard.
The steam_api.dll file is a critical component used by GRID Autosport steamapidll for grid autosport link
If you own the game on Steam, the easiest and most reliable fix is to let Steam redownload the missing file for you. Open your . Right-click on GRID Autosport and select Properties . Navigate to the Local Files tab. Steam will scan every file, compare it to