| 200 | OK | Success | The request was successful |
| 201 | Created | Success | A new resource was successfully created |
| 202 | Accepted | Success | The request was accepted but not yet processed |
| 204 | No Content | Success | Request succeeded with no response body |
| 301 | Moved Permanently | Redirection | The resource has been permanently moved |
| 302 | Found | Redirection | The resource is temporarily available elsewhere |
| 304 | Not Modified | Redirection | Cached version can be used |
| 400 | Bad Request | Client Error | Invalid request or malformed syntax |
| 401 | Unauthorized | Client Error | Authentication is required |
| 403 | Forbidden | Client Error | You do not have permission to access this resource |
| 404 | Not Found | Client Error | The resource could not be found |
| 405 | Method Not Allowed | Client Error | HTTP method is not supported for this resource |
| 409 | Conflict | Client Error | Request conflicts with current server state |
| 422 | Unprocessable Entity | Client Error | Validation failed on request data |
| 429 | Too Many Requests | Client Error | Rate limit exceeded |
| 500 | Internal Server Error | Server Error | An unexpected server error occurred |
| 502 | Bad Gateway | Server Error | Invalid response from upstream server |
| 503 | Service Unavailable | Server Error | Server is temporarily unavailable |
| 504 | Gateway Timeout | Server Error | Upstream server failed to respond in time |
