Dear HTX Users,

To improve your trading experience, HTX will make the following API adjustments for the USDT-margined futures trading in the Multi-Assets Collateral mode, starting August 1, 2025, at 02:00 (UTC).

1. The trade_id field will be corrected to normal values in the query for trade history (over the last three days) and the subscription for trade change data.
2. The business_type field will no longer be returned when querying order history. You must input the exact futures symbol, when getting perpetual or delivery futures using the contract_code parameter.

Examples:

contract_code == null → returns error: "Invalid contract_code parameter"

contract_code == 'BTCS-USDT' → returns error: "Invalid contract_code parameter"

contract_code == 'BTC-USDT' → returns perpetual futures data

contract_code == 'BTC-USDT-251103' → returns delivery futures data

For more information, please refer to the API documentation at the HTX Open Platform.

This update only applies to USDT-margined futures trading.

HTX Team

July 28, 2025

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