LDSTech is a community site where users can contribute to the technological work of the LDS (Mormon) church. The Gospel Library Catalog API allows mobile devices to search for and look up content (available as books) that are available for download. Users can look up the languages and platforms for which content is available. The catalog provides a taxonomy of the content showing it in the correct order. Users also have the ability to download content via the API. The API uses RESTful calls and responses are formatted in XML and JSON.