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Marketing Marketing 27Marketing Marketing 27 

How to make an XML Listener for an external system??

Hi, this is my second trying to get an answer to this question. I am using HTTP Post method to send XML to an external system. 

I know there are many diffferent options for SENDING messages to external systems. Rest, Soap, platform events, etc.

However, I really need to build something for RECEIVING XML messages from the exteranl system I'm sending to.

Can anyone explain how i go about buildind an XML listener for an external system? I'm finding tons of articles about how to send to external systems but basically nothing about how to listen for responses.

Thanks.