There are two main reasons why card addition might fail:Documentation Index
Fetch the complete documentation index at: https://developers-sandbox.uqpaytech.com/llms.txt
Use this file to discover all available pages before exploring further.
- Card limit exceeded: Each UnionPay user can only add up to 10 bank cards. If you’ve reached this threshold, remove any cards you don’t regularly use and attempt the process again.
- Frequent removal activity: The system may temporarily block additions if cards have been recently removed. Wait some time before trying again.