Look up a status, pick the right one for an API, or hit a live endpoint that actually returns it. Add ?code=418 to this URL and the response is that status — useful for curl, interceptors, and “what does my client do on 503?” Nothing here phones home except the Try it fetch to this same page.
Which class?
The client closed the connection while nginx was still handling it. Access-log only, in original nginx.
When to use
Diagnosing abandoned requests and gateway timeouts from the client side.
Don’t
Origins should not send 499. A timeout waiting on upstream is 504.
Live URL
curl -i https://corecoding.com/utilities/http-status.php?code=499
No codes match.
Code use cases