You are here OpenSearch API - Developers is the online portal for the Nature Publishing Group, a major publisher of important scientific and medical information, both in print and online. The OpenSearch API provides an open, bibliographic search service for the site's content, which comprises around half a million news and research articles and citations. Indexes covering the complete publication history for all journals listed at are searchable as well. The OpenSearch API uses RESTful calls that may be issued in a variety of data formats.