The Agent Gateway is a service that sits in front of https://github.com/rtbkit 's Agent Configuration Service and provides a RESTFul API that masks and extends the later's functionality. It's core motivation is to provide an easy way to start and stop bidders through a web app. So, what's easier than a RESTful API ?
Check the wiki for mor info at :
https://github.com/USMediaConsulting/agent_gateway/wiki/Agent-Gateway-Documentation