Try it out server side sample https://github.com/GoogleChrome/samples/blob/gh-pages/quictransport/quic_transport_server.py client side sample https://googlechrome.github.io/samples/quictransport/client.html documents https://web.dev/quictransport/#try-it-out how to generate and apply certificate errors spki list https://security.stackexchange.com/questions/188037/is-there-a-way-to-use-private-certs-for-accessing-private-websites-that-doesnt