RE: https://mastodon.social/@fediversereport/116178002926045553
That's exactly why having a standard that covers all the interactions, clients and servers is essential.
https://connectedplaces.online/reports/fr156-share-where/
Movim "API" is XMPP, Mastodon API is Mastodon API, developped by Mastodon and for Mastodon. Only the servers to servers interactions are standardized and specified in ActivityPub.