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 must authenticate with the proxy. Analogous to 401, with Proxy-Authenticate.
When to use
Corporate proxies. Origin servers almost never send this.
Don’t
Your API’s login wall is 401, not 407.
Live URL
curl -i https://corecoding.com/utilities/http-status.php?code=407
No codes match.
Code use cases