The ActivityPub specification does not have an example of the "sharedInbox" field in use.
Although it does say "An optional endpoint..." — I suspect a lot of people won't know (with confidence) that it can go under the "endpoints" field. For example:
"endpoints": {
"sharedInbox": "https://social.example/inbox"
},
Especially if the person is still trying to understand ActivityPub, and isn't aware of the "endpoints" field yet.
#ActivityPub #DeSo #FediDev #FediDevs #Fediverse #SharedInbox