JavaScript Rendering API

The BrowserSolver JavaScript Rendering API loads a public URL in a managed headless browser and returns the HTML once client-side scripts have finished — no Chromium fleet to run.

• JavaScript Rendering API — Run a managed browser session against a public URL and collect the HTML after client-side scripts finish.

Use it for single-page apps, infinite lists and any site whose content only appears after JavaScript runs.

• How it works
• JavaScript Rendering API
• Code examples in other languages
• Use cases
• Why BrowserSolver?
• FAQ
• Related repositories
• Support

1. Create a BrowserSolver account and copy your API key from the dashboard.
2. Call https://api.browsersolver.com with the header x-api-key: YOUR_API_KEY.
3. Use the result in your app — no infrastructure to run.

export BROWSERSOLVER_API_KEY="your-api-key"
pip install requests        # Python
# TypeScript: Node.js 18+ (native fetch), run with `npx tsx file.ts`

Run a managed browser session against a public URL and collect the HTML after client-side scripts finish. Prefer Crawler for static markup; escalate to WebUnlocker on approved hosts when challenges persist.

GET https://api.browsersolver.com/v1/website/rendering · 2 credits per request · API reference

import os

import requests

API_KEY = os.environ["BROWSERSOLVER_API_KEY"]
HEADERS = {"x-api-key": API_KEY}

response = requests.get(
    "https://api.browsersolver.com/v1/website/rendering",
    headers=HEADERS,
    params={
        "query": "https://quotes.toscrape.com/js/",
    },
    timeout=120,
)
response.raise_for_status()

data = response.json()
print(data)

type JavascriptRenderingApi = string;

const headers = { "x-api-key": process.env.BROWSERSOLVER_API_KEY!, "Content-Type": "application/json" };

const params = new URLSearchParams({
  "query": "https://quotes.toscrape.com/js/",
});

const response = await fetch(`https://api.browsersolver.com/v1/website/rendering?${params}`, { headers });
if (!response.ok) throw new Error(`HTTP ${response.status}: ${await response.text()}`);

const data = (await response.json()) as JavascriptRenderingApi;
console.log(data);

Example response from the API reference, abridged.

"<!DOCTYPE html><html lang=\"en\"><head><meta charset=\"utf-8\"><title>Shipping faster with edge caches | Engineering Notes</title><script src…"

Ready-to-run examples live in examples/; each reads your key from BROWSERSOLVER_API_KEY.

• Single-page apps — Scrape React, Vue or Angular pages that ship an empty HTML shell.
• Wait for content — Return only once a CSS or XPath selector exists with wait_for.
• Lighter pages — Block ads during the session with block_ads.
• Replace Puppeteer — Drop your own headless browser servers.

• Three fetch tiers — Crawler for static HTML, Rendering for JavaScript pages, WebUnlocker for hosts that still challenge a headless browser.
• Know before you fetch — the Antibot endpoint names the bot-protection vendor in front of a URL so you can choose the right tier.
• Screenshots as a service — PNG, JPEG, WebP or PDF, full page, 18 device presets, cookie banner and ad removal, S3 upload.
• Technology detection — CMS, frameworks, analytics, CDN and security tooling of any public URL.
• Copy-paste examples — Python and TypeScript in each README, 7 more languages in examples/.

Create an account on BrowserSolver, copy your API key and send it in the x-api-key header of every request to https://api.browsersolver.com.

Credits per call: /v1/website/rendering 2. See BrowserSolver pricing.

Pass a CSS or XPath selector in wait_for; the browser waits until it exists or until timeout (seconds) is reached.

If the HTML already contains your data, the Crawler tier is faster and cheaper (1 credit instead of 2).

Any language that can make an HTTP request. This README shows Python and TypeScript; the examples/ folder contains cURL, PHP, C#, Go, Java, Ruby and Node.js.

• Web Unlocker API
• Web Crawler API
• Screenshot API
• Antibot Detection API
• Website Technology API
• All BrowserSolver repositories

• 💬 Join the Discord to ask questions and share what you build.
• 📚 Read the API reference.
• 🔑 Get your API key.

_{Built by BrowserSolver. Examples are released under the MIT license.}