Frequently Asked Questions about XUSDT API. For other questions, please contact customer service.

FAQ List

1. Insufficient Balance When Creating Orders

Merchants need to pre-deposit balance for platform transaction fees. Please check the specific rates on the merchant homepage.

📝 Solution: View Deposit Tutorial

2. Missing Payment Address When Creating Orders

All order amounts will be transferred directly to the merchant’s payment address. Please ensure the payment address is correctly configured.

📝 Solution: Payment Address Configuration Guide

3. Invalid Signature Issues

Please check the following points:

• Field names match the documentation
• No unnecessary fields included in signature calculation
• Verify “Required” and “Sign Required” requirements in parameter descriptions

4. Merchant Callback Response

After receiving a notification, please return OK or ok in the response body.

// PHP示例
echo "OK";

注意：未正确响应将触发最多5次重复通知