Capture Bot-Protected Sites — Cloudflare, DataDome, Akamai
Rendex rotates a realistic browser user-agent stack for sites behind anti-bot systems and flags the capture when an interstitial is detected — so your pipeline never silently stores a block page as a screenshot.
The Problem
Generic screenshot APIs get caught by modern anti-bot systems. You either get a block page stored as a 'screenshot,' a challenge interstitial, or a 403 you have to parse yourself. Worse, most services silently save the block page and mark the job successful — so the bad capture quietly lands in your pipeline.
The Solution
Rendex uses a realistic desktop-browser user-agent profile by default and includes first-party bot-block detection. When the rendered page matches a known challenge interstitial (Cloudflare Turnstile, DataDome, Akamai Bot Manager, PerimeterX), the response flags it honestly via response header — so you can retry, route, or log instead of storing a broken screenshot. For protected sites that need a geo-routed IP, pair with the Pro/Enterprise geo-targeted proxy.
See it in action
Get Started in Minutes
curl -G "https://api.rendex.dev/v1/screenshot" \
-H "X-API-Key: $RENDEX_KEY" \
--data-urlencode "url=https://protected-site.example" \
--data-urlencode "waitUntil=networkidle2" \
--output capture.png
# Inspect response headers:
# x-rendex-blocked: true (bot-block detected)
# x-rendex-block-reason: cloudflare
# x-rendex-load-time-ms: 4213from rendex import Rendex
rendex = Rendex("YOUR_API_KEY")
result = rendex.screenshot(
url="https://protected-site.example",
wait_until="networkidle2",
best_attempt=True,
)
# Bot-block status is reported via response headers
# (x-rendex-blocked / x-rendex-block-reason), not the result object.
open("capture.png", "wb").write(result.image)
print(f"Captured in {result.metadata.load_time_ms}ms ({result.metadata.bytes_size} bytes)")100 free API calls/month — no credit card required. Get your API key and start building.
Built for This Use Case
Stealth User-Agent Stack
Realistic Chrome desktop fingerprint by default. Sites see a normal browser, not a headless render.
Honest Bot-Block Detection
When Cloudflare, DataDome, Akamai, or similar interstitials are detected, the response flags it — you never silently store a block page.
Geo-Routed Capture (Pro+)
Pair with geo-targeted rendering from 50+ countries on Pro and Enterprise to defeat region-based IP filtering.
Best-Attempt Mode
Even when a page is partially blocked, Rendex returns the best capture it could get along with honest metadata instead of a silent failure.
Start Free, Scale as You Grow
100 calls/month free. Starter at $69/mo for 10K calls (or $58/mo billed annually — 2 months free). Pro at $179/mo for 100K calls.