Automatic Certificate Management Environment (ACME) is officially RFC 8555 now:
"This document describes a protocol that a CA and an applicant can use to automate the process of verification and certificate issuance. The protocol also provides facilities for other certificate management functions, such as certificate revocation."
mastodon.at is a microblogging site that federates with most instances on the Fediverse. Note: This instance will shut down on February 29th, 2020.