// ==UserScript==
// @name         Amazon Music - Skip to Spotify
// @description  Amazon Music - Skip to Spotify.
// @author       to
// @namespace    https://github.com/to
// @license      MIT
// @version      0.1
// @match        https://music.amazon.co.jp/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=music.amazon.co.jp
// @grant        GM_xmlhttpRequest
// @connect      song.link
// @downloadURL none
// ==/UserScript==

const MARKET = 'JP';

GM_xmlhttpRequest({
    url: `https://api.song.link/v1-alpha.1/links?userCountry=${MARKET}&url=${encodeURIComponent(location.href)}`,
    onload: function(r){
        r = JSON.parse(r.responseText);
        location.href = r.linksByPlatform.spotify.url;
    }});