I have the following use case
Opportunity O has five attachments namely (A1,A2,A3,A4,A5). Each of these attachments are to be sent to different external REST webservices.
In my experience previously, I have integrated object data via JSON deserializing/serializing and sending it to endpoints via HTTP calls.
But I am not sure how to send a file to an external webservice.
Is this even possible ?