mixcloudcom_extract_mp3_.user.js

// ==UserScript==
// @name           mixcloud.com: extract mp3 URL
// @namespace      http://d.hatena.ne.jp/youpy/
// @include        http://www.mixcloud.com/*
// ==/UserScript==

var $ = unsafeWindow.$;

function jsonUrl(path) {
  return 'http://www.mixcloud.com/api/1/cloudcast'
    + path.replace(/\/$/, '')
    + '.json?embed_type=player';
}

if(document.querySelector('.newstyle-play-btn')) {
  $.getJSON(jsonUrl(location.pathname), function(data) {
    var div = $('.cloudcast-titles');
    var links = data.audio_formats.mp3;

    links.forEach(function(url) {
      var linkText = 'mp3';
      div.append($(linkText.link(url)).css({ 'margin-right': '5px' }));
    });
  });
}