Years ago, I posted on how to make the connection to CJ through the SOAP and REST calls. I haven’t played with the code for CJ in sometime as my account was closed due to inactivity (didn’t have time to focus on affiliate marketing.) I am not sure if anything is deprecated with the REST call that was made back then, but if nothing has changed, I have my plugin available to be downloaded for free.
This plugin not only makes the connection to CJ and searches for products based on your relationship with the advertiser, but it also searches Amazon and eBay giving you three times the potential to make a buck or two.
The eBay part of the plugin actually connects to an RSS feed with your eBay Partner Network campaign id. It is not necessary to have API keys to connect with this plugin.
Amazon and Commission Junction, however, do require your API keys. (Don’t worry, they are free. :D) Simply sign up for the programs at their respected websites and you are ready to start using the plugin.
In the next few days, I will dissect the code here and go over each part of it.
In the meantime, if you would like to try it out, you can download it at http://wordpress.org/plugins/actionaffiliate/. I will also make available source code to an entire script dedicated to these three programs in the next coming weeks.