Sauce Labs
Cloud continuous testing platform for cross-browser testing
About this crawler
Sauce Labs is a web crawler identified by the regular-expression pattern Sauce Labs in the User-Agent request header. It is categorised as browser-automation. Use the regex above to detect, log, allow, or block Sauce Labs traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
No block-rate data for this crawler.
Technical details
- Name
- Sauce Labs
- Pattern
Sauce Labs- Tags
- browser-automation
- Reference
- https://saucelabs.com/
- Added
- 2026/05/02
- rDNS suffixes
.saucelabs.com,.saucelabs.net- Instances
- 0 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely Sauce Labs with forward-confirmed reverse DNS: the client IP's PTR record must end in one of the suffixes below and a forward A/AAAA lookup of that hostname must return the same IP. UA strings alone are spoofable; FCrDNS is not.
.saucelabs.com.saucelabs.net
Sample User-Agent strings
no public sample user-agents recorded.
Block this crawler
robots.txt — disallow Sauce Labs:
User-agent: Sauce Labs
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Sauce Labs [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Sauce Labs") {
return 403;
}
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