I'm in the same boat here. Trying to develop a module for the WHMCS billing system. I'd like to provide this addon module to others who use WHMCS, but it seems that I can't use the key to redirect other users of this addon module to their own website. This is pretty much a show stopper for enabling me to share this module with others, unless I make then generate their own key. To say I'm disappointed is an understatement. I am frustrated by this. What a horrible limitation in this API. Even more frustrating is that this looks like it's been the case for several years. It seems there is no workaround to this, so I'm not asking for the answer. Just expressing my deep disappointment and hoping that perhaps the API can be tweaked to allow this type of developing and sharing of code. Richard
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