InDesign Server 2017 export PDF thru SOAP

hi, is there any way to use SOAP to send document, convert the file and send back PDF (via SOAP)? it seems some people are able to do it, but I can't figure it out. It seems people are using functions like `fetchResource` and `putResource`. Do I need to get/write plugin to be able to do that? Please kindly share your experience. Thanks.