Q: Why is the response content from the API null?#
A: Please check if the HTTP request header includes Content-Type and User-Agent. According to the Interface rules, both must not be empty when requesting the payment platform's API.
Q: Why does the API return an error saying “Request data only supports JSON format”?#
A: The API only supports data transmission in JSON format, per the Interface rules.
Q: Why does the API return an error saying “Signature verification of the API parameters failed”?#
Reason 1: The uploaded merchant public key does not match the signature private key used in the API request. If they don't match, please re-upload the merchant public key (ensure it follows the standard public key format).
Reason 2: Check if the signing function used for the data is correct. It's highly recommended to use the signing function provided by your programming language, signing the string to be signed with SHA256 with RSA using the merchant's private key.
Reason 3: Verify if the format of the signature string in the request data is correct. Make sure to construct the signature string according to the required format and generate the request signature accordingly.
