@Jluc both have been released 
- OCEA Smart Building: Intégration externe - OCEA Smart Building (eau et chauffage en copropriété)
- ista Web’conso: the topic right next door, in Development
I checked the connection of both against the real portals: it goes all the way through. What remains to be validated with a real account is the reading of the meter readings. If you can try OCEA, I’d be interested, especially to see what comes up for heating 