dYdX Foundation has officially launched Permissioned Keys, which provides API traders with higher security, control, and risk management capabilities, especially suitable for institutions and market makers. This feature allows account allocation of different permissions, such as limiting withdrawals, specifying tradable markets, managing sub-accounts, etc., to improve account security and operational flexibility. According to official content, Permissioned Keys are only applicable to API trading, support multi-key management, whitelist trading pairs setting, and prevent unauthorized fund transfers. Although leverage restrictions or trading volume restrictions for unfilled orders are currently not supported, future versions may add more risk management functions.