Send and receive XML via Http Post Request

I'm trying to make a call out to a third party using http post. I can get this to work using the Send Http Post Request trigger with a document template. My issue is i need to get a response from the third party and store that information for use in another call. it doesn't appear to be an option inside the trigger unless I'm missing something. I tried to use the rbv_api.sendHttpPost API, but that appears to only work if I'm sending json and not xml.

Is this something that is possible?

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