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 resource is locked.
When to use
WebDAV LOCK. A few APIs reuse it for “resource is checked out.”
Don’t
If you are not doing WebDAV, 409 or 423 with a documented meaning.
Live URL
curl -i https://corecoding.com/utilities/http-status.php?code=423
No codes match.
Code use cases