About this bot
foureff is a verified crawler associated with 4F and is used for site audit.
The primary identifying signal is 4f.at/crawler.
4F performs owner-configured website audits covering internal pages, external links, assets, redirects, TLS issues, response speed, and broken anchors. Robots rules are respected by default but can be configured per project.
Directory status: Active. Identity classification: Verified with High confidence.
robots.txt handling depends on the product mode, configuration, or request context.
Risk classification: Neutral. Treat User-Agent strings as claims unless corroborated by the verification signals recorded for this entry.
How to identify this bot
- User-agent and crawler identifiers
-
4f.at/crawler4f.at/crawler Mozilla/5.0
Details
- Kind
- Crawler
- Family
- BITS
- Purpose
- Site audit
- Common Use
- foureff is used for uptime monitoring, synthetic checks, performance measurement, accessibility review, and site-health testing.
- Respects robots.txt
- Depends
Verification
- Identity Type
- Verified bot
- Evidence Method
- Match the 4f.at/crawler marker and corroborate with an expected owner-configured 4F audit.
- Detection Notes
- Match `4f.at/crawler` as an identity signal and apply the recorded verification method before granting identity-based trust.
Website controls
- Robots.txt Snippet
# robots.txt handling depends on product mode or request context. Use server-side controls when stronger restriction is required.