Rails 3 design: "hiding" an entry with "attribute" true, but only on the api level

In a rails 3 app, I have a model with a boolean attribute called "archived". This attribute is accessible in the cms, where I can go in and edit individual objects, and a checkbox where I can check if an object is archived or not. However, if this object is archived, I don't want this object to be accessible on the api level. That includes the object itself, and its associated objects. At the same time I would like the object to be accessible in the cms, to edit other details and set the archived value back to false, so that I can access the object again in the api and change its behaviour back to default.

I would really appreciate suggestions on how to approach this from a design/high level perspective. Thank you for your help.