I'm creating an app in nodejs to send an email using MailChimp. I've tried to use https://apidocs.mailchimp.com/sts/1.0/sendemail.func.php but changed it to use 3.0 api because 1.0 seems to no longer work (big surprise). I've setup my app with

var apiKey = '<<apiKey>>',

        toEmail = '<<emailAddress>>',

        toNames = '<<myName>>',

        message = {

            'html': 'Yo, this is the <b>html</b> portion',

            'text': 'Yo, this is the *text* portion',

            'subject': 'This is the subject',

            'from_name': 'Me!',

            'from_email': '',

            'to_email': toEmail,

            'to_name': toNames

        },

        tags = ['HelloWorld'],

        params = {

            'apikey': apiKey,

            'message': message,

            'track_opens': true,

            'track_clicks': false,

            'tags': tags

        },

        url = 'https://us13.api.mailchimp.com/3.0/SendEmail';

needle.post(url, params, function(err, headers) {

    if (err) {

                console.error(err);

            }

            console.log(headers);

    }

});

I keep getting a 401 response (not authorized because I'm not sending the API key properly)

I have to use needle due to the constraints on the server.