Upload key to WKD from command line?

[Wolfgang Traylor]

Hello GnuPG community,

Is there a way to upload my public key to the Web Key Directory (WKD) of my email provider using command-line tools?

I am looking for a simple solution just like `gpg --send-keys`, but for WKD.

My providers are Posteo, mailbox.org, and Protonmail.

(Enigmail shows the “Upload to Web Key Directory” only in gray. I don’t know why.)

Best regards,
W. Traylor