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?
A hint, before the final response, that the client can start loading linked resources.
When to use
CDNs and servers that send Link: rel=preload while generating the document.
Don’t
Not an application success code. The final status still follows.
Live URL
curl -i https://corecoding.com/utilities/http-status.php?code=103
No codes match.
Code use cases