5. API Errors

Code	Meaning
200	Request completed.
201	PayIn or PayOut created.
401	API key, timestamp, or signature is invalid.
404	PayIn or PayOut with the supplied external_id was not found.
422	Request validation or business-rule error.
429	Rate limit exceeded.
500	Internal server error.

For an EPT VND PayIn, Invalid paymentData includes details for invalid or missing paymentData.account_number, paymentData.holder, and paymentData.bank_code.

For an EPT VND PayOut, validate the required recipient fields: card_number, paymentData.bank_code, and paymentData.holder. paymentData.bank_code must be one of the values in Bank Codes.