Methods, systems, computer-readable media, and apparatuses are presented for using cross-domain communication to allow manufacturers and other sellers to use cloud/Internet-based products catalog services without sacrificing the search-engine optimization benefit of catalog pages hosted within the manufacturer's domain. The Same Origin Policy used by many browsers may disallow direct communication to the manufacturer's domain for corporate web site and other functions, on the one hand, and an external domain for an efficiently hosted products catalog, on the other. Some embodiments present the use of the JSONP protocol for cross-domain retrieval of a Catalog Widget that is configured to retrieve product catalog information directly from the external domain. In these embodiments, search-engine optimization is furthered by the efficient production of numerous catalog pages that originate from the external domain yet appear to users and search engine crawlers to be within the manufacturer's domain.