I have been able to create categories using the REST API, and I can view categories associated with items (with the relationship having been created through the web interface) using the REST API, but I have not been able to figure out how to add items to a category using the REST API.
Ideally, I would like to be able to both update a single item (eg, add one item to a category) and do a bulk update of a category (supplying a large number of items).
Am I missing something obvious?