HTX to Adjust Futures Trading API Permissions and Available Leverage Rules

To maintain a fair and healthy trading environment and further safeguard user assets, HTX will implement adjustments to futures trading API permissions and available leverage rules, effective at 15:00 (UTC) on March 29, 2026. Please review the updated rules carefully. 1. API Order Placement Permissions Based on KYC Level Users who have not completed KYC verification, or who have only completed level 1 KYC verification, will be unable to place futures orders via the API. To continue accessing API-based futures trading, users must complete at least level 2 KYC verification. 2. Available Leverage Subject to KYC Level Users with level 2 KYC verification are subject to a maximum leverage of 5x for futures trading. To use leverage above 5x, level 3 KYC verification is required. 3. Important Notes (1) Sub-accounts inherit the KYC level of their main account. Accordingly, API futures trading restrictions and available leverage for sub-accounts are the same as those of the main account. (2) The API restrictions in this update apply to standard futures trading only. Copy trading and grid trading are unaffected and will continue to follow existing rules. (3) For API users unable to place futures orders under the new rules: (4) For API users whose available leverage is capped at 5x or below: Thank you for your understanding and support. HTX Team March 29, 2026(HTX)