The COAP API return appropriate COAP status codes for every request.
| 2.01 | Created |
| 2.02 | Deleted |
| 2.03 | Valid |
| 2.04 | Changed |
| 2.05 | Content |
| 4.00 | Bad Request |
| 4.01 | Unauthorized |
| 4.03 | Forbidden |
| 4.04 | Not Found |
| 4.08 | Request Entity Incomplete |
| 4.12 | Precondition Failed |
| 4.13 | Request Entity Too Large |
| 5.00 | Internal Server Error |
| 5.02 | Bad Gateway |
| 5.03 | Service Unavailable |
| 5.04 | Gateway Timeout |