Announcement on UTA API Rate Limit Rule Upgrade

To improve API resource allocation efficiency and enhance flexibility for high-frequency trading scenarios, we will upgrade the UTA API rate limit mechanism.
 
After this upgrade, the API rate limit model will be changed from the current “independent rate limit per UID” model to a “unified master account and sub-accounts rate limit with flexible quota allocation” model.
 

1. Effective Time

This upgrade is scheduled to take effect on:  2026-06-08 08:00:00 (UTC)
 

2. Scope of Impact

This adjustment applies only to:
  • Rate Limit Pool: Unified Trading Account (UTA) rate limit pool
  • API Scope: Applies only to Pro API. Classic API remains unchanged.

 

3. Adjustment Details

Current Rules
  • Each UID has an independent API rate limit quota;
  • Master accounts and sub-accounts calculate rate limits independently;
  • Rate limit resources cannot be shared across different sub-accounts.
 
【Illustration】
 
 
Updated Rules
  • The system will allocate a unified total UTA API rate limit quota based on the user’s VIP level;
  • All sub-accounts will share the same user-level total rate limit pool;
  • Users may allocate the total rate limit quota across different sub-accounts as needed.
 
【Illustration】
 
 

4. Rate Limit Quota Details

  • The total rate limit quota rules corresponding to different VIP levels can be found at: https://www.kucoin.com/docs-new/rate-limit
  • Rate Limit Notes
    • Newly created sub-accounts will have a default API rate limit of 10 requests per second. This default value will not be counted toward the user’s total API rate limit quota.
    • Master account rate limit quota = User’s current total rate limit quota - Total quota allocated to sub-accounts (excluding the default 10 requests/s allocation).
  • Upgrade and Downgrade Rules
    • Upgrade Rules If an account is upgraded, the available rate limit quotas for both master and sub-accounts will increase accordingly. Users may manually reconfigure sub-account rate limit allocations afterward.
    • Downgrade Rules If an account is downgraded, the rate limits of sub-accounts will be automatically adjusted proportionally to the new quota values. The master account rate limit will then be recalculated based on the total allocated quota of all sub-accounts.
          For example: A user is downgraded from VIP7 to VIP5
          Total rate limit quota changes from 1000 to 700
          The rate limit of each UID will be reduced proportionally to 70%.
 

5. Existing User Migration Rules

For existing users, the initial migration will follow the rules below:
  • Sub-account rate limit = min(Total VIP rate limit quota / Total number of master and sub-accounts, Maximum rate limit allowed for each sub-account)
  • Master account rate limit = Total VIP rate limit quota - Total allocated quota occupied by sub-accounts
If no sub-accounts exist, the master account will be directly upgraded to the new rate limit model.
 
 
 
In case of significant market volatility prior to the scheduled time, the upgrade may be postponed, and a separate announcement will be made accordingly.
 
For further API discussions or feedback, please join our official API Telegram group
 or contact us via email at: api@kucoin.com
 
We sincerely apologize for any inconvenience caused. Thank you for your continued support of the KuCoin API!