I&#39;m trying to make a HTTP POST request to the google QPX Express API [1] using ***nodejs*** and ***request*** [2].

My code looks as follows:

        // create http request client to consume the QPX API
        var request = require(&quot;request&quot;)

        // JSON to be passed to the QPX Express API
        var requestData = {
            &quot;request&quot;: {
                &quot;slice&quot;: [
                    {
                        &quot;origin&quot;: &quot;ZRH&quot;,
                        &quot;destination&quot;: &quot;DUS&quot;,
                        &quot;date&quot;: &quot;2014-12-02&quot;
                    }
                ],
                &quot;passengers&quot;: {
                    &quot;adultCount&quot;: 1,
                    &quot;infantInLapCount&quot;: 0,
                    &quot;infantInSeatCount&quot;: 0,
                    &quot;childCount&quot;: 0,
                    &quot;seniorCount&quot;: 0
                },
                &quot;solutions&quot;: 2,
                &quot;refundable&quot;: false
            }
        }

        // QPX REST API URL (I censored my api key)
        url = &quot;https://www.googleapis.com/qpxExpress/v1/trips/search?key=myApiKey&quot;

        // fire request
        request({
            url: url,
            json: true,
            multipart: {
                chunked: false,
                data: [
                    {
                        &#39;content-type&#39;: &#39;application/json&#39;,
                        body: requestData
                    }
                ]
            }
        }, function (error, response, body) {
            if (!error &amp;&amp; response.statusCode === 200) {
                console.log(body)
            }
            else {

                console.log(&quot;error: &quot; + error)
                console.log(&quot;response.statusCode: &quot; + response.statusCode)
                console.log(&quot;response.statusText: &quot; + response.statusText)
            }
        })

What I&#39;m trying to do is passing the JSON using the multipart argument [3].
But instead of the proper JSON response I got an error (400 undefined).

When I make a request using the same JSON and API Key using CURL instead, it works fine. So there&#39;s nothing wrong with my API key or JSON.

What&#39;s wrong with my code?

**EDIT**:

working CURL example:

i) I saved the JSON which I would pass to my request into a file called &quot;request.json&quot;:

    {
      &quot;request&quot;: {
        &quot;slice&quot;: [
          {
            &quot;origin&quot;: &quot;ZRH&quot;,
            &quot;destination&quot;: &quot;DUS&quot;,
            &quot;date&quot;: &quot;2014-12-02&quot;
          }
        ],
        &quot;passengers&quot;: {
          &quot;adultCount&quot;: 1,
          &quot;infantInLapCount&quot;: 0,
          &quot;infantInSeatCount&quot;: 0,
          &quot;childCount&quot;: 0,
          &quot;seniorCount&quot;: 0
        },
        &quot;solutions&quot;: 20,
        &quot;refundable&quot;: false
      }
    }

ii) then, in the terminal I switched to the directory in which the newly created request.json file was located and run (myApiKey stands for my actual API Key obviously):

    curl -d @request.json --header &quot;Content-Type: application/json&quot; https://www.googleapis.com/qpxExpress/v1/trips/search?key=myApiKey


[1] https://developers.google.com/qpx-express/
[2] a http request client designed for nodejs: https://www.npmjs.org/package/request
[3] here is an example I found https://www.npmjs.org/package/request#multipart-related
[4] https://stackoverflow.com/questions/27179248/qpx-express-api-is-returning-400-parse-error

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