A quick reference for the most common HTTP status codes across all classes.
| 100 | Continue |
| 101 | Switching Protocols |
| 102 | Processing (WebDAV) |
| 200 | OK — Standard success response |
| 201 | Created — Resource created |
| 202 | Accepted — Async processing |
| 204 | No Content — Success, no body |
| 301 | Moved Permanently |
| 302 | Found (Temporary Redirect) |
| 304 | Not Modified (caching) |
| 307 | Temporary Redirect |
| 308 | Permanent Redirect |
| 400 | Bad Request |
| 401 | Unauthorized |
| 403 | Forbidden |
| 404 | Not Found |
| 405 | Method Not Allowed |
| 409 | Conflict |
| 422 | Unprocessable Entity |
| 429 | Too Many Requests |
| 500 | Internal Server Error |
| 502 | Bad Gateway |
| 503 | Service Unavailable |
| 504 | Gateway Timeout |