Is this site behind Kasada?
Cryptographic proof-of-work bot defence used by streaming, retail, and travel — recognisable by the `x-kpsdk-*` headers.
Free diagnostic • Confidence scoring • Signal-by-signal breakdown • Recommended client configuration
Verification keeps this tool free from abuse. For diagnostic and developer use only — run checks on sites you are authorised to access.
What is Kasada?
Kasada uses an in-browser proof-of-work to make automation expensive: the browser must compute a token before each protected request. Combined with a heavy JS fingerprint, it filters most automated traffic.
Read the full Kasada glossary entry
How Kasada protects sites
- ›Proof-of-work token computed in-browser (`x-kpsdk-ct`)
- ›`x-kpsdk-cd` and `x-kpsdk-v` request headers
- ›Heavy obfuscated JS sensor
- ›Server-side challenge enforcement at every endpoint
Detection signals we look for
- ✓
x-kpsdk-*request or response headers - ✓Inline script from
/_kpsdk/orkpsdk.com - ✓429 / 403 with
x-kpsdk-fcfailure code
Recommended Scrappey client configuration
For authorised access only — your own properties, contractually permitted scraping, QA, monitoring, accessibility audits, and similar use cases. Always respect the site's terms of service and applicable law.
- →A full browser is required — the proof-of-work is CPU-bound and obfuscated.
- →Use Scrappey browser mode with
antibot: "kasada". - →Match proxy country; Kasada classifies geo mismatches harshly.
- →Recycle sessions; tokens are short-lived.
Create a free account to run the configuration above — 150 credits included, no card required.
Kasada FAQ
Why is the proof-of-work mandatory?
The PoW token is verified server-side on every request. The only way to produce a valid token is to run Kasada's JS in a real engine, the way the protection expects.
Related concepts
Deeper reading on the techniques and signals that surround Kasada.
Concept map
How anti-bot protection fits together
Hover a vendor or technique to see the connections. Click any node to read the full glossary entry. The lines show which detection techniques each vendor leans on.
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