@reiver ⊼ (Charles) :batman:
AcitivityPub isn't the only protocol used by the Fediverse.
NodeInfo is another protocol that makes up the suite of protocols that the Fediverse is based on.
https://github.com/jhass/nodeinfo/blob/main/PROTOCOL.md
NodeInfo is used to discover various information about the server node.
Such as:
• the software it is running (ex: Mastodon, PIxelfed, etc)
• the server node's total number of users,
• the number of posts on the server node,
• the number of active users,
• etc.