amazon.js

var amazon = Meteor.npmRequire('amazon-product-api');
var client = amazon.createClient({
    awsId: "#####",
    awsSecret: "#####",
    awsTag: "#####"
});

Meteor.methods({
    'searchAmazon': function(searchParameters) {
        check(searchParameters, String);
        console.log(searchParameters);
        return client.itemSearch({
            keywords: searchParameters,
            searchIndex: 'All',
            responseGroup: 'ItemAttributes,Offers,Images'
        }).then(function(results) {
            // console.log(results[4].DetailPageURL);
            return results;
        }).catch(function(err) {
            console.log(err);
        });
    },
    'addToAmazonCart': function(itemsToAdd) {
        check(itemsToAdd, String);
        console.log(itemsToAdd);

        client.cartCreate({
            'Item.1.ASIN': 'itemsToAdd.data.ASIN[[0]',
            'Item.1.Quantity': '1'
        }).then(function(results) {
            console.log(results);
            return results;
        }).catch(function(err) {
            console.log(err);
        });
    }
});

item.js

 Template.itemTile.events({
     'click .add-to-cart': function() {
         var that = this;
         Meteor.call('addToAmazonCart', that.ASIN, function (error, result) {

         });
     }
 });