Yes, with Integration Server you can do HTTP post/get to any web server. (get implies that you’re getting something from the server, but the parameters of the get can “push” data to the server).
Review the pub.client:http service. You can send basic data in a few get parameters or post an HTML form, or XML, or a CSV, or a MIME document, etc.
#Integration-Server-and-ESB#webMethods#webMethods-General#webMethods-Architecture