# May 2026

## [May 28, 2026] Added Create Agent Subaccount API

**New API:**

- `/api/v2/user/create-agent-subaccount` Create a dedicated sub-account for an AI Agent instance

## [May 19, 2026] Get Agent Customer List / Get Agent SubCustomer List: Removed 90-Day Registration Time Restriction

Interface:
- /api/v2/broker/customer-list
- /api/v2/broker/sub-customer-list

Changes:
- Removed the 90-day registration time restriction. Both endpoints now support querying clients registered at any time.
- If `startTime` / `endTime` are not provided, all registered clients under the broker will be returned with no time restriction.

## [May 12, 2026] Added X-CHANNEL-API-CODE Support for 5 Classic Trade Interfaces

**Interfaces:**
- `/api/v2/spot/trade/cancel-replace-order`
- `/api/v2/spot/trade/batch-cancel-replace-order`
- `/api/v2/mix/order/close-positions`
- `/api/v2/mix/order/click-backhand`
- `/api/v2/mix/order/place-pos-tpsl`

Changes:
- All above interfaces now support the `X-CHANNEL-API-CODE` HTTP request header for broker rebate tracking.

## [May 12, 2026] WebSocket Depth Channels: checksum Field Removed;  Futures books Channel Added pseq Field

**Channels affected:**
- Spot: `books` / `books1` / `books5` / `books15`
- Futures: `books` / `books1` / `books5` / `books15`

Changes:
- The `checksum` push parameter has been **removed** from the affected depth channels. Please use `seq` for order book consistency verification instead.
- Added `pseq` (String) push parameter to the Futures `books` channel: serial number of the previous push. Can be used to determine whether there is packet loss.

Demo trading launch date: April 28, 2026.<br/>
Live trading launch date: May 19, 2026.<br/>
This change has already been **deployed on the demo environment**. Please complete your adaptation before it goes live in production.