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 October 19, 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

Ahrefs Site Audit in context

Ahrefs Site Audit is a utility crawler operated by Ahrefs. In plain terms, it checks pages for an SEO, uptime or analytics service. Our database files it under SEO tools and ranks it Tier 4, specialist crawlers that matter to particular sites or markets. 19 of the 19 SEO tools in our database share this tier.

Its safety rating is safe and its blocking impact is not documented. So the decision about Ahrefs Site Audit rests on what you want from Ahrefs, not on its behaviour. How we rate safety and impact.

How site owners treat Ahrefs Site Audit

Our robots.txt study of the Tranco top 10,000 did not track AhrefsSiteAudit as a named token, so we do not publish an adoption figure for it. If you run a large site, your own logs are the best evidence of how often it visits.

Does it follow robots.txt?

Ahrefs Site Audit's operator does not clearly document how it treats robots.txt. Write the Ahrefs Site Audit rule anyway, then confirm in your logs that its requests stop.

Ahrefs crawlers and close alternatives

Ahrefs Site Audit is one of 2 Ahrefs crawlers in our database. A User-agent: AhrefsSiteAudit group controls Ahrefs Site Audit only; the other Ahrefs tokens below need their own lines.

  • AhrefsSiteAudit: this crawler (Tier 4)
  • AhrefsBot: Ahrefs SEO, checks pages for an SEO, uptime or analytics service (Tier 4)

To give Ahrefs Site Audit the same answer as its siblings, stack User-agent: AhrefsSiteAudit with their lines above one set of rules; to treat Ahrefs Site Audit differently, give it its own group.

Other SEO tools that do the same job (checks pages for an SEO, uptime or analytics service) include AwarioBot from Awario, AwarioRssBot from Awario, AwarioSmartBot from Awario, Chrome-Lighthouse from Google, DataForSeoBot from DataForSEO, DotBot from Moz. Deciding about Ahrefs Site Audit is usually a decision about the whole group, so check how your file treats these too.

We first recorded AhrefsSiteAudit on September 22, 2026. Ahrefs documents it on ahrefs.com, and we recheck that page before each release.

Which rule Ahrefs Site Audit actually follows

Ahrefs Site Audit reads exactly one group in robots.txt, the most specific one that names AhrefsSiteAudit, and never combines rules across groups. This short file shows the trap:

User-agent: *
Disallow: /private/

User-agent: AhrefsSiteAudit
Disallow: /drafts/
  1. Find the group. Ahrefs Site Audit looks for a group naming AhrefsSiteAudit. One exists, so it ignores User-agent: * completely.
  2. Apply only that group. It is refused /drafts/ and nothing else.
  3. The surprise. /private/ is open to Ahrefs Site Audit, because that rule lives in the * group it no longer reads. To keep it out of both, repeat Disallow: /private/ inside its own group.
Test yourself: does a rule under User-agent: * apply to Ahrefs Site Audit if the file also has a User-agent: AhrefsSiteAudit group?

No. Once a group names it, Ahrefs Site Audit reads only that group. Put every rule you want it to follow inside its own group.

Test yourself: will blocking Ahrefs Site Audit remove your pages from AI answers?

Often, yes. Ahrefs Site Audit is a utility crawler, so pages it cannot fetch can drop out of the answers or results it supports.

Related: how AI engines choose their sources

Test yourself: is User-agent: ahrefssiteaudit the same as User-agent: AhrefsSiteAudit?

Yes. RFC 9309 makes user-agent matching case-insensitive. Paths are a different story: Disallow: /Blog/ does not block /blog/.

Should you allow Ahrefs Site Audit? Decide by situation

Recommended setting for Ahrefs Site Audit by type of site
If you are...Recommended setting
You publish content and want AI answers to cite itLow stakes either way. It does not decide whether AI answers cite you.
You license content and want to stop AI trainingBlocking it does not stop training, because Ahrefs Site Audit is a utility crawler. Block the operator's training crawler instead.
You run an online shopAllow it unless your logs show it is costly.
Your server is under load from botsRate-limit before blocking. It is rated safe in our database.

Check Ahrefs Site Audit on your own site

  1. Open /robots.txt on your domain and search for AhrefsSiteAudit. If it is not named, it follows User-agent: *.
  2. List the Disallow lines in the group Ahrefs Site Audit follows and test your key URLs against them; the longest match wins, and Allow wins a tie.
  3. Look beyond the file. A firewall or bot manager can refuse Ahrefs Site Audit even when robots.txt allows it, and that never shows in the file.
  4. Run our AI crawlability checker to see how Ahrefs Site Audit and every other crawler we track are treated in one pass, including firewall refusals.

Common mistakes with Ahrefs Site Audit

The errors we see most often with Ahrefs Site Audit in the files and firewalls we test:

  1. Treating Ahrefs Site Audit as an AI or search crawler. Blocking it has little effect on visibility; decide based on load and what it does with your data.
  2. Relying on robots.txt alone when Ahrefs Site Audit is rated caution or aggressive. Back the rule with a server-side block.
  3. Blocking Ahrefs Site Audit by IP alone. Ranges change; match the token and verify with logs.

All three hide inside a file that looks correct, so check Ahrefs Site Audit from outside after every change.

Spotting Ahrefs Site Audit in your logs

robots.txt says what Ahrefs Site Audit may do; your access logs show what it actually did.

Count requests

On a server with standard Nginx or Apache logs, this counts matching requests per day (adjust the log path for your host):

grep -iE "AhrefsSiteAudit" /var/log/nginx/access.log \
  | awk '{print $4}' | cut -d: -f1 | sort | uniq -c

And this shows which paths it requested most, which is the quickest way to see whether your Disallow lines are being respected:

grep -iE "AhrefsSiteAudit" /var/log/nginx/access.log \
  | awk '{print $7}' | sort | uniq -c | sort -rn | head -20

Check the requests are genuine

Anyone can send the Ahrefs Site Audit user-agent, so confirm the source before acting on a match:

  • AhrefsSiteAudit: we hold no published IP list, so use reverse DNS where the operator documents a hostname and treat an unverifiable Ahrefs Site Audit request with caution.

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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