This mod works. If you are testing locally using something like xampp, you have to ensure your openssl is all set. This will get rid of the wrapper https error people have. If you get transaction error, just edit the wsdl/RateService_v9.wsdl. At bottom replace : <s1:address location="https://gateway.fedex.com/web-services/"/> with: <s1:address location="https://wsbeta.fedex.com:443/web-services/"/> Gateway is the production server so duh it works with a production key. If you have a test key (dev test), you need to post the response to the sandbox. Hope this helps someone. The mod does work just poor documentation.