Safe Official docs SEO Tools

Ahrefs Site Audit

Operated by Ahrefs

Quick Facts

User-Agent:
AhrefsSiteAudit
Category:
SEO Tools
Operator:
Ahrefs
Safety:
Safe
Blocking Impact:
Low - No SEO ranking impact
SEO Impact Score:
2/10
Official docs:
ahrefs.com

Confirmed by the operator

Ahrefs names AhrefsSiteAudit on its own documentation page, linked above. The token, purpose and robots.txt behaviour on this profile come from that page, re-checked on September 22, 2026.

What is Ahrefs Site Audit?

Ahrefs Site Audit is a monitoring and validation agent operated by Ahrefs. It checks pages, ad destinations, or policy compliance rather than collecting training data. It has no effect on search rankings.

Ahrefs Site Audit is a monitoring and validation agent operated by Ahrefs. It checks pages, ad destinations, or policy compliance rather than collecting training data. It has no effect on search rankings.
Ahrefs Site Audit uses the user-agent token AhrefsSiteAudit. You can control it via robots.txt, meta tags (noai), or the emerging llms.txt standard. Robots.txt is voluntary; for hard enforcement, combine it with server-level IP blocking.

What happens if you block Ahrefs Site Audit?

🔶 AI Visibility Trade-off - Blocking Ahrefs Site Audit will not hurt Google or Bing rankings, but it can remove your content from AI search answers and assistant citations powered by this crawler. Block only if you have a deliberate reason.
Generally safe to allow; provides legitimate crawling value.

How to block Ahrefs Site Audit with robots.txt

<code>User-agent: AhrefsSiteAudit</code> - Matching is case-insensitive. Robots.txt is fetched from the root of each subdomain separately.

Block completely (robots.txt)
User-agent: AhrefsSiteAudit Disallow: /
Allow all (robots.txt)
User-agent: AhrefsSiteAudit Allow: /
Block private only (robots.txt)
User-agent: AhrefsSiteAudit Disallow: /private/ Disallow: /api/ Disallow: /admin/ Allow: /
Nginx server block
# Nginx: Hard-block Ahrefs Site Audit if ($http_user_agent ~* "AhrefsSiteAudit") { return 403 "Bot blocked"; }
Apache .htaccess
# Apache: Hard-block Ahrefs Site Audit SetEnvIfNoCase User-Agent "AhrefsSiteAudit" bad_bot Order Allow,Deny Allow from all Deny from env=bad_bot
Meta robots tag
<meta name="robots" content="noindex, nofollow">
X-Robots-Tag header
X-Robots-Tag: noindex, nofollow

Is Ahrefs Site Audit safe to allow?

Yes, Ahrefs Site Audit is a safe and legitimate crawler operated by Ahrefs. It follows the Robots Exclusion Protocol (RFC 9309) and can be controlled with standard robots.txt rules.
Verify by reverse-DNS lookup: legitimate Ahrefs Site Audit requests resolve to Ahrefs's domain.

What does Ahrefs Site Audit do?

Understanding Ahrefs Site Audit's purpose helps you decide whether to allow or block it.

  • Validates pages, ads, or policy compliance
  • Performs automated quality and safety checks
  • Does not collect training data
  • No impact on search rankings
  • Generally safe to allow

Frequently Asked Questions

What is the official user-agent string for Ahrefs Site Audit?
The official user-agent string for Ahrefs Site Audit is: AhrefsSiteAudit. Use this exact string in robots.txt, Nginx, Apache, or Cloudflare firewall rules to target this bot. Matching in robots.txt is case-insensitive. Verify a request genuinely comes from Ahrefs Site Audit by performing a reverse-DNS lookup on the source IP.
Is Ahrefs Site Audit safe?
Yes, Ahrefs Site Audit is a safe and legitimate crawler operated by Ahrefs. It follows the Robots Exclusion Protocol (RFC 9309) and can be controlled with standard robots.txt rules.
Will blocking Ahrefs Site Audit hurt my SEO?
🔶 AI Visibility Trade-off - Blocking Ahrefs Site Audit will not hurt Google or Bing rankings, but it can remove your content from AI search answers and assistant citations powered by this crawler. Block only if you have a deliberate reason.
How do I block Ahrefs Site Audit in robots.txt?
Add the following lines to your /robots.txt file:
User-agent: AhrefsSiteAudit
Disallow: /

This instructs Ahrefs Site Audit not to crawl any path on your site. To block only specific sections, replace / with the path (e.g., Disallow: /blog/).
Does Ahrefs Site Audit respect robots.txt?
Ahrefs Site Audit is operated by Ahrefs and is expected to fetch and parse /robots.txt before crawling, following RFC 9309. For hard enforcement, combine robots.txt with server-level IP or user-agent blocking.
How do I verify if Ahrefs Site Audit is crawling my site?
Search your web server access logs for the string AhrefsSiteAudit (case-insensitive: grep -i "AhrefsSiteAudit" /var/log/nginx/access.log). Filter by user-agent in your log analytics tool (GoAccess, AWStats, etc.).

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