Enable Duolingo Debug Menu and get Ambassador Preview Features
// ==UserScript==
// @name Duolingo Debug Menu
// @icon https://d35aaqx5ub95lt.cloudfront.net/images/da14ffb8a3d5d7529416127e5761244f.svg
// @namespace https://tampermonkey.net/
// @version 1.0
// @description Enable Duolingo Debug Menu and get Ambassador Preview Features
// @author apersongithub
// @match *://*.duolingo.com/*
// @match *://*.duolingo.cn/*
// @grant none
// @run-at document-start
// @license MPL-2.0
// ==/UserScript==
// WORKS AS OF 2025-11-22
/*
* Below this is the actual fetch interception and modification logic for Duolingo Max
*/
(function () {
'use strict';
// --- Configuration ---
const TARGET_URL_REGEX = /https?:\/\/(?:[a-zA-Z0-9-]+\.)?duolingo\.[a-zA-Z]{2,6}(?:\.[a-zA-Z]{2})?\/\d{4}-\d{2}-\d{2}\/users\/.+/;
function shouldIntercept(url, method = 'GET') {
// FILTER 1: Do not intercept POST/PUT/DELETE. Only GET requests load profile data.
if (method.toUpperCase() !== 'GET') return false;
const isMatch = TARGET_URL_REGEX.test(url);
// FILTER 2: Explicitly exclude the shop-items endpoint to prevent the 400 error loop
if (url.includes('/shop-items')) return false;
if (isMatch) { try { console.log(`[API Intercept DEBUG] MATCH FOUND for URL: ${url}`); } catch { } }
return isMatch;
}
function modifyJson(jsonText) {
try {
const data = JSON.parse(jsonText);
// --- MODIFICATIONS ---
// ONLY modifying roles, removed hasPlus/shopItems/trackingProperties
data.roles = ["admin"];
// ---------------------
return JSON.stringify(data);
} catch (e) {
return jsonText;
}
}
// fetch Override
const originalFetch = window.fetch;
window.fetch = function (resource, options) {
const url = resource instanceof Request ? resource.url : resource;
// Detect method to ensure we only intercept GET
const method = (resource instanceof Request) ? resource.method : (options?.method || 'GET');
if (shouldIntercept(url, method)) {
return originalFetch.apply(this, arguments).then(async (response) => {
const cloned = response.clone();
const jsonText = await cloned.text();
const modified = modifyJson(jsonText);
let hdrs = response.headers;
try { const obj = {}; response.headers.forEach((v, k) => obj[k] = v); hdrs = obj; } catch { }
return new Response(modified, { status: response.status, statusText: response.statusText, headers: hdrs });
}).catch(err => { throw err; });
}
return originalFetch.apply(this, arguments);
};
// XHR Override
const originalXhrOpen = XMLHttpRequest.prototype.open;
const originalXhrSend = XMLHttpRequest.prototype.send;
XMLHttpRequest.prototype.open = function (method, url, ...args) {
this._method = method; // Store method for the check in .send()
this._url = url;
originalXhrOpen.call(this, method, url, ...args);
};
XMLHttpRequest.prototype.send = function () {
// Check method here as well
if (shouldIntercept(this._url, this._method)) {
const originalOnReadyStateChange = this.onreadystatechange;
const xhr = this;
this.onreadystatechange = function () {
if (xhr.readyState === 4 && xhr.status >= 200 && xhr.status < 300) {
try {
const modifiedText = modifyJson(xhr.responseText);
Object.defineProperty(xhr, 'responseText', { writable: true, value: modifiedText });
Object.defineProperty(xhr, 'response', { writable: true, value: modifiedText });
} catch (e) { }
}
if (originalOnReadyStateChange) originalOnReadyStateChange.apply(this, arguments);
};
}
originalXhrSend.apply(this, arguments);
};
})();