Generate Text File from CSV in Pipelines to use in the body of an API call.

I'm looking for a methodology to take a CSV in pipelines and convert that to a raw text in order to put in the body of an API call. 

I have had no success passing the CSV (as binary) via QB URL so this is my next step.  I'm essentially trying to submit a CSV with an API call but does not seem we can do that from a URL.  If anyone has experience in doing this I would love to hear your tips/tricks!!