Duolingo Scraper

Extract language course structures, skill trees, lesson units, and available languages from Duolingo learning platform. Built on spider-browser .

Get started Docs

target
duolingo.com: success rate
99.9%: latency
~4ms

Quick start

Extract data in minutes.

duolingo-scraper.ts

import { SpiderBrowser } from "spider-browser";

const spider = new SpiderBrowser({
  apiKey: process.env.SPIDER_API_KEY!,
});

await spider.connect();
const page = spider.page!;
await page.goto("https://www.duolingo.com/courses");
await page.content(10000);

const data = await page.evaluate(`(() => {
  const languages = [];
  document.querySelectorAll("[data-test='course-card']").forEach(el => {
    const language = el.querySelector("h2")?.textContent?.trim();
    const learners = el.querySelector("[data-test='learner-count']")?.textContent?.trim();
    const fromLang = el.querySelector("[data-test='from-language']")?.textContent?.trim();
    if (language) languages.push({ language, learners, fromLang });
  });
  return JSON.stringify({ total: languages.length, languages: languages.slice(0, 20) });
})()`);

console.log(JSON.parse(data));
await spider.close();

ready to run · spider-browser · TypeScript

Fetch API

One endpoint for duolingo.com.

Structured JSON from duolingo.com with a single POST. AI-resolved selectors, cached on the first call.

POST /fetch/duolingo.com/

LanguageCourse sectionsUnit titleLesson countSkill nameLevel

Try it Fetch docs

cURL

curl -X POST https://api.spider.cloud/fetch/duolingo.com/ \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"return_format": "json"}'

Python

import requests

resp = requests.post(
    "https://api.spider.cloud/fetch/duolingo.com/",
    headers={
        "Authorization": "Bearer YOUR_API_KEY",
        "Content-Type": "application/json",
    },
    json={"return_format": "json"},
)
print(resp.json())

Node.js

const resp = await fetch("https://api.spider.cloud/fetch/duolingo.com/", {
  method: "POST",
  headers: {
    "Authorization": "Bearer YOUR_API_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({ return_format: "json" }),
});
const data = await resp.json();
console.log(data);

Extraction