Should HTTPRequest return the same as curl in this case

Question

The following shell script is used to access an IoT device that returns a JSON string, the content of which is not important for this question.

#!/bin/sh
secret= <not_telling>
id="e00fce688e6bcd0bad0763e7"
curl -k "https://api.particle.io/v1/devices/$id/peek" -d access_token=$<not_telling> -d args=5

I would like to reproduce this functionality in Mathematica

(* id and secret have been defined *)
req = HTTPRequest[
  "https://api.particle.io/v1/devices/" <> id <> "/peek",
  <|"Method" -> "POST", 
   "Query" -> {"args" -> "5", "access_token" -> secret}|>]
URLExecute@req

This code does successfully POST; however it behaves as if the "-d args=5" portion of the query is missing or ignored. I'm likely missing something trivial, but cannot place my finger on it.

Answer 1

The curl request is passing the arguments as a form body, but the Mathematica expression is passing query arguments in the URL. Try changing the request property "Query" to "Body" to match the curl request:

req = HTTPRequest[
  "https://api.particle.io/v1/devices/" <> id <> "/peek",
  <|"Method" -> "POST", 
    "Body" -> {"args" -> "5", "access_token" -> secret}|>]
URLExecute@req