Patrick,
It sounds like you are asking if the Integration Server can be used as a client to a REST server. The answer is yes. The four HTTP methods required for full REST compliance (get, put, post, delete) are all available through the pub.client:http service. pub.client:http also makes all the data returned by a server - the response header fields and the response body - available to applications. You can use pub.client:http to issue requests to and get responses from a REST server.
Regards,
Michael
#webMethods#Integration-Server-and-ESB