What's blocking
your requests?
Paste any URL. We make a real request and identify the bot protection behind it — Cloudflare, DataDome, Akamai, PerimeterX and 30+ others. Then we show you how to get through.
37 providers,
one check.
Detection runs on the actual HTTP response — status patterns, challenge signatures, headers, cookies and HTML markers. No headless browser needed for detection.
Anti-bot systems
Full bot-management platforms that fingerprint browsers, score behaviour and issue JS challenges.
CAPTCHA vendors
Challenge widgets embedded in pages — often stacked on top of an anti-bot platform.
Platform-specific
First-party protections the big platforms run themselves.
The sites that
block the hardest.
These are the most common targets people run through the checker — and the ones where default tooling fails first.
access LinkedIn profiles without getting blocked
LinkedIn returns its own challenge flow — even plain requests get flagged. Session-based stealth browsing is the reliable path.
Amazon
scrape Amazon without getting blocked
Amazon serves CAPTCHAs on datacenter traffic within minutes. Stealth browser sessions keep product pages loading.
Zillow
get Zillow data without a 403
Behind aggressive WAF rules that hard-block datacenter IPs. Stealth sessions cut the 403s dramatically.
Indeed
scrape job listings from Indeed
Indeed rotates between Cloudflare and its own challenges depending on traffic patterns.
Booking.com
access Booking.com data automatically
Travel pricing sites are heavy DataDome users — dynamic pricing means every request is watched closely.
fetch Reddit pages without rate limits
Reddit returns 403s on challenge flows and rate-limits aggressively at scale.
Detected it.
Now get through.
Spectrae provides stealth browsers on the standard Playwright API. Your selectors, waits and interactions stay exactly the same — only the connection line changes.
- Stealth sessions built for protected sites
- Sessions start in under a second, cleanup handled for you
- Stealth engine at $0.05/min, billed per second
- $1 free credit to test against your checked site
import { firefox } from "playwright"; // 1. Check a site with the antibot checker above // 2. Point your scraper at Spectrae's stealth endpoint const browser = await firefox.connect( "wss://browser.spectrae.dev/stealth/playwright?key=YOUR_KEY" ); const page = await browser.newPage(); await page.goto("https://the-site-you-checked.com"); // Stealth session ✓ // Challenge served to curl / headless Chromium → not here
Questions about
bot detection.
How can I tell if a website uses Cloudflare or another anti-bot system?
+
Enter the URL in the checker above. It makes a real HTTP request and inspects the response — status codes, headers, cookies and HTML markers — against known fingerprints for 30+ providers including Cloudflare, DataDome, Akamai, PerimeterX and Kasada.
What's the difference between a CAPTCHA and an anti-bot system?
+
CAPTCHAs (reCAPTCHA, hCaptcha, Turnstile) are widgets that verify a single interaction. Anti-bot platforms (Cloudflare, DataDome, Akamai) are full systems that fingerprint your TLS handshake, browser, IP reputation and behaviour before you ever see content — often issuing a JavaScript challenge instead of a visible CAPTCHA.
Which websites block bots the most?
+
The most-blocked targets are LinkedIn, Amazon, Zillow, Indeed, Booking.com, Instagram and Google — all running either first-party protections or enterprise anti-bot platforms. E-commerce, travel, jobs and real-estate sites invest most in bot mitigation because their data has direct market value.
How do I access a site that's blocking my scraper?
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Plain HTTP clients and default headless browsers are trivially detected in 2026. The practical fix is routing your automation through a stealth browser — realistic browser signals across TLS, canvas, WebGL and navigator APIs. Spectrae hosts one: change one line of Playwright code to connect to it.
The checker says 'no challenge'. Does that mean scraping will work?
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Not necessarily. Some sites only challenge suspicious traffic — headless browsers, datacenter IPs, high request rates — while letting a plain first request through. Treat a clean result as 'no protection on a single polite request', and expect protections to appear as volume grows.
Is there an API to bypass bot protection?
+
Spectrae provides a hosted stealth browser on the standard Playwright API. You connect over WebSocket and interact with pages normally while the underlying session is built to pass the checks protected sites run on automated traffic. Billing is per second with no monthly minimum.
From detection to access.
Know the block.
Skip the block.
$1 free credit · per-second billing · no monthly minimum