Error Codes

Exchange

For 4XX Errors, the returned data contains the reason.
Each object has "detail" which are representing what you sent wrong.

For example,

{
  "errorCode": "MARKET_UNAVAILABLE",
  "message": "market is closed today ;)",
  "details": {
    "market": "unavailable",
  }
}

means 'Market is closed.'

Every API specification has reason data sheet below, so you can check what the problem it is.

code	data	HTTP StatusCode
INVALID_ARGUMENT	Parameters are not a valid format, parameters are empty, or out of range. A parameter was sent when not required.	400
RATE_LIMIT_EXCEEDED	You are sending requests too frequently. Please try it later.	429
TRADING_UNAVAILABLE	Our Server is full loaded.	503
NOT_ENOUGH_BALANCE	not enough ;)	400
NOT_ALLOWED_COMBINATION	Set of parameter is not allowed in same time (market sell - gtcpo is prohibited)	400
MARKET_UNAVAILABLE	Market is closed today ;)	503
INVALID_MARKET	Requested market is not exist.	400
INVALID_ORDER	Requested order is not exist. Or It is not your order.	400
INVALID_CURRENCY	Requested currency is not exist on ProBit system.	400
UNAUTHORIZED	You have to login.	401
TOO_MANY_OPEN_ORDERS	Too many open orders.	403
DUPLICATE_ADDRESS	Address already exists in withdrawal address list.	400