Adding a room to a community(using api)

[ehounake]

We are trying to add some rooms to communities using events endpoint like this:
_http://${MatrixHost}/matrix/client/r0/rooms/${roomId}/state/m.room.related_groups?user_id=${masqId}

...and sending what it seems adding a room from the community page manually sent as event content:
{"groups": ["+agroup:adomain.net"]}

The event m.room.related_groups is registered but after clicking communities icons to filter rooms, only the ones added manually are visible.
Not sure it is just missing api or hidden since I cannot find any api documentation on it.

[t3chguy]

That is the state event for storing room settings flair. The groups APIs are not implemented in this SDK and very shortly will be replaced with Spaces which just makes use of standard room APIs

[ehounake]

In that case is there a way to do that by querying synapse? (since I don't know exactly when these Spaces apis will be implemented)