| 200 | OK | Successful GET or POST request. |
| 201 | Created | Successful POST request. |
| 204 | No Content | Successful DELETE request. |
| 400 | Bad Request | An unsuccessful GET, POST or PUT request due to invalid content. |
| 401 | Unauthorized | Requesting a restricted URL with incorrect credentials. |
| 403 | Forbidden | Making a request that isn't allowed. |
| 404 | Not Found | Unsuccessful request due to an incorrent parameter in the URL. |
| 405 | Method Not Allowed | Request method not allowed for the given URL. |
| 409 | Conflict | Unsuccessful POST request when another object with the same data already exists. |
| 500 | Internal Server Error | Problem with your server or the database server. |