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?
Reserved for future digital payment systems. Some APIs use it for unpaid accounts anyway.
When to use
Only if you have a documented billing meaning. Not a general-purpose error.
Don’t
Prefer 403 or a 402 you document clearly. Do not assume clients understand it.
Live URL
curl -i https://corecoding.com/utilities/http-status.php?code=402
No codes match.
Code use cases