# Status Codes

- Normal

  Returned Value | Description
  --- | ---
  200 OK | The request has been successfully processed.
  201 Created | The request has been successfully processed and a resource has been created.
  202 Accepted | The request has been accepted but may not be processed immediately.
  204 No Content | The request has been successfully processed, but there is no need to send any data back.

- Abnormal

  Returned Value | Description
  --- | ---
  400 Bad Request | The request failed to be processed due to bad syntax.
  401 Unauthorized | A username and a password are required to access a page.
  403 Forbidden | The requested page cannot be accessed.
  404 Not Found | The requested page cannot be found.
  405 Method Not Allowed | A method in the request is not allowed.
  406 Not Acceptable | The response cannot be accepted by the client.
  407 Proxy Authentication Required | The client must be authorised by the proxy before the request can proceed.
  408 Request Timeout | The request timed out.
  409 Conflict | Failed to complete the request due to a conflict.
  500 Internal Server Error | Failed to complete the request due to a system error.
  501 Not Implemented | Failed to complete the request because the server does not support all that is needed for the request to be completed.
  502 Bad Gateway | Failed to complete the request because the server has received an invalid response from an upstream server.
  503 Service Unavailable | Failed to complete the request because the server is unavailable.
  504 Gateway Timeout | The server has waited too long for a response from an upstream server.

Parent topic: Public Parameters