Would I be able to communicate directly with the ConstantContact API from within a Flex/ActionScript app or would I need to use a (PHP) proxy. I noticed you have a crossdomain.xml set up on the api.constantcontact.com root however it seems as if permission is restricted to apps developed on intuit's partner platform (workplace.intuit.com). Coincidentally, this is exactly where I'm developing however I'm curious if, while developing, I'll be able to make calls locally in a debug environment.
Any insight you could provide would be greatly appreciated.
At this time you will need to use an integration with another language such as PHP or ColdFusion, due to the Flash runtime not accessing sites that it does not have permission to, as defined in the crossdomain.xml file hosted on the site.
Our engineers are looking into possibly updating the crossdomain.xml file so that access is given to flash, but at this time I do not have an estimated time that it may be available if we do update the crossdomain file. If we do make any updates regarding that, we were certainly post that on this site.
If you have any questions regarding this, please let me know.