| 401 | 1001 | This API key is invalid. | api key无效。 |
| 400 | 1002 | This category param is invalid. | 传入的category参数无效。 |
| 400 | 1003 | Currency symbols [err_sym1, err_sym2] error. | 传入货币参数错误。 |
| 400 | 1004 | An uploaded date param error. | 传入date 参数错误。 |
| 400 | 1005 | The start or end params error. | 传入时间戳格式不正确。 |
| 400 | 1006 | An interval param error. | 传入interval 参数错误。 |
| 400 | 1007 | This amount param is in error. it must be float-point number or integer number. | 传入 amount 参数格式错误。 |
| 404 | 2001 | The request resources not found. | 请求的资源不存在。 |
| 429 | 2002 | Too many requests. Please try again later. | 请求接口调用频率过高，请稍后再试。 |
| 429 | 2003 | The credit rate limit reached. please upgrade the subscribe plan or waiting for the next cycle. | 可用点数已用完，请升级套餐或等待下一个周期再使用该服务。 |
| 403 | 2004 | The current subscription plan does not support this API port. | 当前订阅的套餐不支持该端口。 |
| 403 | 2005 | The current subscription plan does not support the historical rate of [YYYY-MM-dd]. | 当前订阅的套餐不支持请求「YYYY-MM-dd」的历史汇率。 |
| 500 | -1 | Unknow error. | 未知服务器错误。 |