API for adding calendar to room

Hi, guys
We are working on room import to Robin, it is working correctly, but room can't be booked till it has calendar attached. I don't see in api doc ability to do that, but from dev console I see request going to
PUT https://api.robinpowered.com/v1.0/spaces/:spaceId/calendar
Can you confirm, that we can use this api endpoint to solve our issue? Can you update api docs, please?