No 'Access-Control-Allow-Origin' header is present on the requested resource

Since you are on your development environment you may want to try a workaround, by allowing you browser to run in a non-secure mode.

For Chrome on Windows, from CMD try:

> cd C:\Program Files (x86)\Google\Chrome\Application> chrome.exe --user-data-dir="C:/Chrome dev session" --disable-web-security

The --disable-web-security flag will allow you to make cross domain requests. The --user-data-dir flag will allow you to open a new session only for development.

This is just a workaround for you development work! Don't use this in production or navigate to other sites in this session!

The issue is Javascript cannot make cross-domain requests. This is done for security reasons so that a script cannot call a remote server and expose sensitive data.

Below is a link to a very good and simple explanation with a few options on how to get around it:

http://developer.yahoo.com/javascript/howto-proxy.html

And here is a previous answer which has some good information as well:

Why am I seeing an "origin is not allowed by Access-Control-Allow-Origin" error here?

If they don't have the header set then you can't force them to have the headers. Perhaps you should look at using JSONP. However, mirroring through the server wouldn't be all that bad since you'll only have to deal with it at most once per visit, and more than likely once per user since so few people ever delete cookies.