Climb the browser ladder — start free, escalate only when needed. L1 (fetch) → L2 (local Playwright) → L3 (BrowserCat) → L4 (Browserless.io for CAPTCHA/bot bypass).
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See how to installReview the instructions the agent will receive before you install.
Climb from free to paid only when you need to.
Run the setup script after installation:
./skills/browser-ladder/scripts/setup.sh
Or manually add to your .env:
# Optional - only needed for Rungs 3-4
BROWSERCAT_API_KEY=your-key # Free: https://browsercat.com
BROWSERLESS_TOKEN=your-token # Paid: https://browserless.io
┌─────────────────────────────────────────────┐
│ 🪜 Rung 4: Browserless.io (Cloud Paid) │
│ • CAPTCHA solving, bot detection bypass │
│ • Cost: $10+/mo │
│ • Requires: BROWSERLESS_TOKEN │
├─────────────────────────────────────────────┤
│ 🪜 Rung 3: BrowserCat (Cloud Free) │
│ • When local Docker fails │
│ • Cost: FREE (limited) │
│ • Requires: BROWSERCAT_API_KEY │
├─────────────────────────────────────────────┤
│ 🪜 Rung 2: Playwright Docker (Local) │
│ • JavaScript rendering, screenshots │
│ • Cost: FREE (CPU only) │
│ • Requires: Docker installed │
├─────────────────────────────────────────────┤
│ 🪜 Rung 1: web_fetch (No browser) │
│ • Static pages, APIs, simple HTML │
│ • Cost: FREE │
│ • Requires: Nothing │
└─────────────────────────────────────────────┘
Start at the bottom. Climb only when needed.
| Situation | Rung | Why |
|---|---|---|
| Static HTML, APIs | 1 | No JS needed |
| React/Vue/SPA apps | 2 | JS rendering |
| Docker unavailable | 3 | Cloud fallback |
| CAPTCHA/Cloudflare | 4 | Bot bypass needed |
| OAuth/MFA flows | 4 | Complex auth |
Need to access a URL
│
▼
Static content? ──YES──▶ Rung 1 (web_fetch)
│ NO
▼
JS rendering only? ──YES──▶ Rung 2 (Playwright Docker)
│ NO │
│ Success? ──NO──▶ Rung 3
▼ │ YES
CAPTCHA/bot detection? ────────────────────▶ DONE
│ YES
▼
Rung 4 (Browserless.io) ──▶ DONE
// Built into Clawdbot
const content = await web_fetch("https://example.com");
docker run --rm -v /tmp:/output mcr.microsoft.com/playwright:v1.58.0-jammy \
npx playwright screenshot https://spa-app.com /output/shot.png
const { chromium } = require('playwright');
const browser = await chromium.connect('wss://api.browsercat.com/connect', {
headers: { 'Api-Key': process.env.BROWSERCAT_API_KEY }
});
const { chromium } = require('playwright');
const browser = await chromium.connectOverCDP(
`wss://production-sfo.browserless.io?token=${process.env.BROWSERLESS_TOKEN}`
);
// CAPTCHA handled automatically
| Service | Cost | Sign Up |
|---|---|---|
| BrowserCat | Free tier | https://browsercat.com |
| Browserless.io | $10+/mo | https://browserless.io |
Both are optional — Rungs 1-2 work without any API keys.
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