[Plugin: WordPress Forms] Post form data to URL

Hello guys… I’m brand new to WordPress and I’m impressed with the simplicity and resources available. One thing that caught my attention and would like to explore some more is the option to post the form data to an URL or API… As a Java/Grails software engineer I see a great potential of posting the form data to my a web service I can easily create and store the data however I want and wherever I want. My question is what are the rules when posting to a URL? Lets say I have a form with Name, Phone, Address (3 fields), what is the format of the content that this plugin will send the data? is it JSON mime type? would it be something like:
{
“name”:”joe”,
“phone”:”123″,
“address”:”123 main”
}

do you guys have any documentation around this?

Thanks again and keep up with the good work!