1 Long: http3 2 Tags: Versions 3 Protocols: HTTP 4 Added: 7.66.0 5 Mutexed: http1.1 http1.0 http2 http2-prior-knowledge 6 Requires: HTTP/3 7 Help: Use HTTP v3 8 See-also: http1.1 http2 9 Category: http 10 --- 11 12 WARNING: this option is experimental. Do not use in production. 13 14 Tells curl to use HTTP version 3 directly to the host and port number used in 15 the URL. A normal HTTP/3 transaction will be done to a host and then get 16 redirected via Alt-SVc, but this option allows a user to circumvent that when 17 you know that the target speaks HTTP/3 on the given host and port. 18 19 This option will make curl fail if a QUIC connection cannot be established, it 20 cannot fall back to a lower HTTP version on its own. 21