This was a challenge I must admit. There wasn't alot of API's to find that handles SOAP-requests. I ended up with one that I tried and failed and tried again. gSOAP. About gSOAP you can find here: www.genivia.com. I downloaded the source from sourceforge which is an opensource version. (I don't recommend installng from your OS-distributor. I yhink there were some source-files that were missing that you need). See here: https://sourceforge.net/projects/gsoap2/. Depending on your system, there are some options whn configuring, making and installing gSOAP. My system is Linux. I had to make sure I had Automake, Bison, Flex openssl, and zlib(everything). The INSTALL.txt file contains all information about how-to install for your specific system.