'''NUS''' (short for '''Nintendo Update Server''') is a set of HTTP servers used to serve [[System Update|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 that require updating.
The request uses the following XML structure :
:'''MessageId''' - unknown
:'''DeviceId''' - unknown
:'''RegionId''' - USA, JAP, EUR, or KOR
:'''CountryCode''' - unknown
::'''TitleId''' - 16-digit title ID in hex
::'''Version''' - decimal version
:'''AuditData''' - unknown
= == Download a TMD, ticket, or content
===These can be downloaded from /ccs/download/<titleid>/<name>, where titleid is the title ID in hex, and name is one of three things:
* tmd[version] - downloads the TMD for the version provided, or the latest version if no version is provided
* cetk - downloads the ticket (free titles only)