| CPC H04N 21/2183 (2013.01) [H04N 21/23106 (2013.01); H04N 21/23424 (2013.01)] | 20 Claims | 

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               1. A method comprising: 
            receiving, from a primary content server, a prefetch request to prefetch a targeted content item to be presented prior to presenting a primary content item on a user device, the prefetch request including prefetch request parameters; 
                generating, a callback Uniform Resource Locator (URL) associated with the prefetch request; 
                transmitting, to the primary content server, the callback URL; 
                obtaining, from a targeted content mediation server, a targeted content configuration corresponding to the prefetch request parameters; 
                obtaining, from a targeted content server, the targeted content item based on the targeted content configuration; 
                receiving, from a client on the user device, a request to provide the targeted content item, the request including the callback URL; and 
                transmitting, to the client, the targeted content item. 
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