main.nim

import r2pipe
import asyncdispatch

proc test {.async.} =
  let r2p = R2PipeHttp(url: "http://cloud.radare.org")
  let res = await r2p.cmd("?V")
  echo(res);

waitFor test();

r2pipe.nim

import sockets, strutils
import httpclient
import asyncdispatch

type
  R2PipeHttp = object
    url*:string

proc cmd*(r: R2PipeHttp, c: string):Future[string] {.async.} =
  var client = newAsyncHttpClient()
  var resp = await client.request(r.url & "/cmd/" & c)
  return resp.body;