'''NUS''' (short for '''Nintendo Update Server''') is a set of HTTP servers used to serve updates for Nintendo's consoles. For the Wii and Wii U, this server is located at http://nus.cdn.shop.wii.com.
== Protocol ==
The Wii uses user agent <code>wii libnup/1.0</code> for all requests.
=== Query a list of titles ===To query a list of titles, a SOAP request is sent to /nus/services/NetUpdateSOAP, with action urn:nus.wsapi.broadon.com/. The result is an XML structure containing all titles.
Download a TMD === A TMD for a given title can be downloaded from /ccs/download/<titleid>/tmd[version], where titleid is the title ID in hex , and omitting the version uses the latest version.
Download a ticket === A title' s ticket can be downloaded from /ccs/download/ <titleid>/ cetk, where titleid is the title ID in hex .
= Downloading contents === Any content can be downloaded with a request to /ccs/download/<titleid>/< contentid>, where titleid is the title ID in hex, and contentid is the content ID in hex.