The more I think about it the more I wonder if we shouldn’t just have the openGarage tell SmartThings when a refresh needs to happen and then the SmartThings can go ask the OpenGarage what values it has. I think this will work the best with the least amount of change on both sides.
So, maybe:
https://${baseUrl}/api/smartapps/installations/${app.id}/needs_update?access_token=${state.accessToken}
Or something like that? What do you think?