Occasionally I receive a question: “Can we access Collaboration for Revit (C4R) model using Forge API?” The answer is: “not quite, but a partially, yes.” Here is the reason why the answer is not a simple yes or no.
When you are working with C4R, you can see a model on BIM 360 Team. This is actually a “published” model. When Revit model is initially uploaded to the cloud for the first time, and every time you press “Publish Latest” (image below), the system publishes the Revit model to BIM 360 Team. The central file that project members works in work-sharing is stored somewhere else. Using Forge API, you can only access to a model published to BIM 360 Team. If you are interested in the API access to the central file, you cannot do currently. Unfortunately, there is no API to publish to the Team, either.