Announcement of KuCoin API Upgrade (2026-06-03)

06/02/2026, 14:26:00

To improve the API trading experience, enhance trading capabilities under the Unified Trading Account (UTA) framework, and reduce integration complexity across different account modes, KuCoin will upgrade the Pro API and release related API updates.
After the upgrade, the Pro API will be upgraded to the UTA API. Going forward, the UTA API will exclusively support the Unified Trading Account (UTA) mode.
 

1. Upgrade Schedule

The upgrade is scheduled for 08:00 on June 3, 2026 (UTC) and is expected to last 180 minutes.
 

2. Upgrade Impact

During the upgrade period, users may experience the following impacts:
  1. The PRO WebSocket may experience temporary disconnections, data loss, or delays. Users may reconnect to the WebSocket to restore the connection.
 

3. Upgrade Details

3.1 UTA API Upgrade

Currently, certain Pro API endpoints are compatible with both Classic Accounts and Unified Trading Accounts (UTA). Moving forward, we will continue to focus on the Unified Trading Account framework and further enhance the UTA API with new capabilities and feature optimizations. Compatibility support related to Classic Accounts will enter maintenance mode and will no longer be the primary focus for future feature development, performance improvements, or long-term platform evolution.
 
[Adjustment Details]
  • The Pro API will be upgraded to the UTA API, which will primarily support the Unified Trading Account (UTA) going forward.
  • Compatibility support related to the Classic Account within UTA API will enter maintenance mode.
 
If you are currently using the “Pro API + Classic Account” model, we strongly recommend completing one of the following migration options as soon as possible:
  • Switch to the Unified Trading Account (UTA) mode for trading;
  • Continue using the Classic API for Classic Account trading.
 
This will help ensure a smooth migration and uninterrupted trading operations.
 

3.2 API Upgrades

  • WebSocket handshake and authentication flow optimization:
    • Synchronous processing will be changed to asynchronous processing during the handshake and authentication stages, reducing blocking behavior and improving the number of authentication requests that can be processed per unit of time.
    • When a WebSocket connection fails authentication due to invalid, expired, or unauthorized credentials, the server will send an “auth failed” message via WebSocket frame, enabling clients to quickly identify the failure reason and take appropriate actions. This optimization does not affect successfully authenticated WebSocket connections.

 

    • positionMargin: Margin occupied by the futures position.
    • riskRatio: Risk ratio of an isolated futures position.

 

  • [Modify] UTA Websocket Position, added response field:
    • pM: Margin occupied by the futures position.
    • r: Risk ratio of an isolated futures position. For example, 0.65 represents 65%.

 

  • [Modify] Classic REST Get Deposit List & Classic REST Get Deposit Detail. The endpoints have added the following status return values to display more detailed deposit statuses:
    • ROLLBACKING : Reversing deposit. Please wait.
    • ROLLBACK : Deposit reversed. No funds have been credited to the account. Please contact support for assistance.
    • WAIT_RISK_MGT: The deposit is undergoing standard risk verification. Please contact support for assistance.
    • RISK_MGT_REJECTED : The deposit is rejected after risk verification. Please contact support to submit required information for review.
    • PRE_SUCCESS: Funds have been credited to the account ahead of final Block confirmation.
    • WAIT_TRM_MGT: The deposit is undergoing standard compliance verification. Please contact support for assistance.
    • TRM_MGT_REJECTED : The deposit is rejected after risk verification. Please contact support to submit required information for review.

 

  • [Modify] UTA Error Code updated to the new version, split into the following modules: UTA General, UTA Account Opening, UTA Order, UTA Account, UTA Position, UTA Spot Trading, UTA Leverage, UTA Futures Trading, UTA Loan

 

  • [Add] Fast API - Apply for Fast Withdrawal
    • Support user-defined API key permissions in the OAuth authorization flow, including granting withdrawal permissions
    • New permission: Fast Withdrawal (Fast API withdrawal permission)
    • Support API withdrawal with 2FA verification

 

 

 

  • [Modify] UTA REST Place Order ,add new field closeOrder to support closing position for specified symbol

 

  • [Modify] UTA REST Get Transfer Quotas ,add new enum UNIFIED in feild accountType in query params and response params
 
 
For more information about the API, please join the official  KuCoin API Telegram Community
You may also contact us via email at: api@kucoin.com
 
We sincerely apologize for any inconvenience this adjustment may cause and appreciate your continued support and trust in the KuCoin API.