505 HTTP Version Not Supported

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?

505

HTTP Version Not Supported

Server error · RFC 9110

The server does not support the HTTP version in the request.

When to use

Rejecting HTTP/0.9 or a version you have turned off.

Don’t

API versioning belongs in the URL or headers, not 505.

Live URL

curl -i https://corecoding.com/utilities/http-status.php?code=505


    

Code use cases