Prisync
Price monitoring service intentionally concealing bot identity
About this crawler
Prisync is a web crawler identified by the regular-expression pattern Prisync in the User-Agent request header. It is categorised as seo. Use the regex above to detect, log, allow, or block Prisync 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
- Prisync
- Pattern
Prisync- Tags
- seo
- Reference
- https://prisync.com/
- Added
- 2026/05/02
- rDNS suffixes
.prisync.com- Instances
- 0 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely Prisync 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.
.prisync.com
Sample User-Agent strings
no public sample user-agents recorded.
Block this crawler
robots.txt — disallow Prisync:
User-agent: Prisync
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Prisync [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Prisync") {
return 403;
}
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