Yes, it is probably the oldest or second oldest server suite in the fediverse (diaspora is maybe older).
It was an early supporter of statusnet and pump.io, which are the earlier versions of ActivityPub.
It originally used it’s own protocol to talk to other friendica instances, but a lot of plug-ins came out adding support for everything, even Facebook support for a while.
Yes, it is probably the oldest or second oldest server suite in the fediverse (diaspora is maybe older).
It was an early supporter of statusnet and pump.io, which are the earlier versions of ActivityPub.
It originally used it’s own protocol to talk to other friendica instances, but a lot of plug-ins came out adding support for everything, even Facebook support for a while.