Dear HTX Users,

HTX will launch the V5 API interfaces for the Multi-Assets Collateral mode in USDT-margined futures trading on May 12, 2025, at 6:00 (UTC).

These API interfaces are specifically designed for users whose account type is set to the Multi-Assets Collateral mode. If you want to use the interfaces, please ensure your account type is updated accordingly. Users operating under the Single-Asset Collateral mode should continue using the existing API interfaces.

These Multi-Assets Collateral V5 API interfaces include private endpoints for orders, positions, and account data, along with dedicated private push channels.

The Single-Asset Collateral interfaces include endpoints such as contract info, market data, futures orders, and futures assets (partially compatible). They are accessible to the Multi-Assets Collateral accounts.

The following interfaces are compatible with Multi-Assets Collateral accounts:

/linear-swap-api/v1/swap_cross_sub_account_list

[Cross Margin] Get asset info of all sub-accounts of your main account.

/linear-swap-api/v1/swap_cross_sub_account_info_list

[Cross Margin] Get sub-account asset info in batches.

/linear-swap-api/v1/swap_master_sub_transfer

[General] Transfer assets between the main account and sub-accounts.

/linear-swap-api/v1/swap_master_sub_transfer_record

[General] Get transfer records between the main account and sub-accounts.

https://api.huobi.pro/v2/account/transfer

[General] Transfer assets between Spot and USDT-M Futures accounts.

Updated usage rules apply to the following field:

Field: client_order_id

For Single-Asset Collateral mode accounts: client_order_id remains valid for up to 8 hours.

For Multi-Assets Collateral mode accounts: client_order_id becomes invalid once the order is fully filled or canceled. For other order state types, client_order_id is valid for a maximum of 8 hours.

HTX Team

May 8, 2025

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