@niko Ubuntu server installation does something similar where you can enter your GitHub username and it will pull the pubkey from there. I don't remember exactly but i think they support some other platform as well but no generic url.
@kitten Microsoft o365 does actually implement this, at least internally for an organization. However it's just something like five corporate-approved positive emojis
Computer nerd of IT-(in)security, hacking & ctf, loves to design stickers, radio signals interest me.