Web to print catalogs can be open for the public, but require registration to place an order. Users can see templates and update previews without registering, but they do have to provide a valid email. Otherwise it is the same as public access mode. Full text »

ZetaPrints web-to-print API allows creating of new users and updating details of existing ones. Full text »

Users can be registered via API with a minimal level of detail to enable their access without logging in. Full text »