To interoperate with other applications on the Fediverse, Emissary implements a number of protocols in addition to ActivityPub, which are listed below for reference.
ActivityPub Emissary supports ActivityPub federation with a wide range of servers.
OpenGraph Emissary reads OpenGraph metadata from pages that do not include ActivityPub or RSS data. In addition, Emissary’s templates should present OpenGraph data to clients.
WebSub Emissary can send and receive content notifications via WebSub
WebMentions Emissary can send and receive WebMentions
Mastodon API Emissary supports a subset of the Mastodon API which lets you use third-party Mastodon clients to post to your Emissary site. (in progress)
oEmbed Emissary published oEmbed data so that other platforms can provide rich, custom links to pages on emissary.
