Quick reference for HTTP response status codes.
| Code | Name | Description |
|---|---|---|
| 200 | OK | Request succeeded. |
| 201 | Created | Resource created. |
| 204 | No Content | Success, no body. |
| 301 | Moved Permanently | URL changed permanently. |
| 302 | Found | Temporary redirect. |
| 304 | Not Modified | Resource not changed. |
| 400 | Bad Request | Client error. |
| 401 | Unauthorized | Authentication required. |
| 403 | Forbidden | Access denied. |
| 404 | Not Found | Resource not found. |
| 405 | Method Not Allowed | HTTP method not supported. |
| 408 | Request Timeout | Server timed out. |
| 429 | Too Many Requests | Rate limited. |
| 500 | Internal Server Error | Server error. |
| 502 | Bad Gateway | Invalid upstream response. |
| 503 | Service Unavailable | Server overloaded. |
| 504 | Gateway Timeout | Upstream timeout. |