| 400 | Bad Request | The incoming request was malformed. |
| 401 | Unauthorized | The caller could not be authenticated. |
| 403 | Forbidden | The caller is not allowed to take this action. |
| 404 | Not Found | The specified resource was not found. |
| 405 | Method Not Allowed | The requested HTTP method is not allowed on this resource. |
| 406 | Not Acceptable | The resource does not have a current representation that would be acceptable to the user agent. The "Accept" header defined an unsupported value. |
| 426 | Upgrade Required | The request was made for an older version of the API, after it has been retired. |
| 429 | Too Many Requests | The caller was throttled due to exceeding the call quota. |
