Safe Official docs SEO Tools

Screaming Frog SEO Spider

Operated by Screaming Frog

Quick Facts

User-Agent:
Screaming Frog SEO Spider
Category:
SEO Tools
Operator:
Screaming Frog
Safety:
Safe
Blocking Impact:
Varies - Evaluate before blocking
SEO Impact Score:
0/10
Official docs:
www.screamingfrog.co.uk

Confirmed by the operator

Screaming Frog names Screaming Frog SEO Spider 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 Screaming Frog SEO Spider?

The user-agent for the Screaming Frog SEO Spider desktop application. It is used by SEO professionals to audit websites.

The user-agent for the Screaming Frog SEO Spider desktop application. It is used by SEO professionals to audit websites.
Screaming Frog SEO Spider is a commercial SEO analytics crawler operated by Screaming Frog. It builds backlink graphs, crawls for technical SEO issues, and tracks keyword rankings. The user-agent Screaming Frog SEO Spider is well-known and respected in the SEO industry. Blocking it removes your domain from Screaming Frog's index, preventing competitors from analysing your backlink profile via their platform. However, other Screaming Frog users also lose visibility into links pointing TO your site - weigh this trade-off carefully.

What happens if you block Screaming Frog SEO Spider?

❓ Impact Unknown - The SEO consequences of blocking Screaming Frog SEO Spider are not fully documented. Before blocking, check your analytics to confirm whether this bot generates referral traffic, review your server logs for crawl frequency, and test in a staging environment if possible.
Generally safe to allow; provides legitimate crawling value.

How to block Screaming Frog SEO Spider with robots.txt

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

Block completely (robots.txt)
User-agent: Screaming Frog SEO Spider Disallow: /
Allow all (robots.txt)
User-agent: Screaming Frog SEO Spider Allow: /
Block private only (robots.txt)
User-agent: Screaming Frog SEO Spider Disallow: /private/ Disallow: /api/ Disallow: /admin/ Allow: /
Nginx server block
# Nginx: Hard-block Screaming Frog SEO Spider if ($http_user_agent ~* "Screaming\ Frog\ SEO\ Spider") { return 403 "Bot blocked"; }
Apache .htaccess
# Apache: Hard-block Screaming Frog SEO Spider SetEnvIfNoCase User-Agent "Screaming\ Frog\ SEO\ Spider" 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 Screaming Frog SEO Spider safe to allow?

Yes, Screaming Frog SEO Spider is a safe and legitimate crawler. It is operated by Screaming Frog, which publicly documents its crawler at an official URL and follows the Robots Exclusion Protocol (RFC 9309). The user-agent string Screaming Frog SEO Spider is verifiable via reverse-DNS lookup on the crawling IP addresses. You can safely allow it unless you have a specific reason to block (e.g., AI training opt-out or SEO tool visibility).
Verify by reverse-DNS lookup: legitimate Screaming Frog SEO Spider requests resolve to screaming-frog's domain.

What does Screaming Frog SEO Spider do?

Understanding Screaming Frog SEO Spider's purpose helps you decide whether to allow or block it.

  • Analyzes website structure and SEO health
  • Tracks backlinks and referring domains
  • Monitors keyword rankings and competitor analysis
  • Crawls sites for technical SEO audits
  • Generates reports for SEO professionals

Screaming Frog SEO Spider in context

Screaming Frog SEO Spider is a utility crawler operated by Screaming Frog. 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 Screaming Frog SEO Spider rests on what you want from Screaming Frog, not on its behaviour. How we rate safety and impact.

How site owners treat Screaming Frog SEO Spider

Our robots.txt study of the Tranco top 10,000 did not track Screaming Frog SEO Spider 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?

Screaming Frog SEO Spider's operator does not clearly document how it treats robots.txt. Write the Screaming Frog SEO Spider rule anyway, then confirm in your logs that its requests stop.

Screaming Frog crawlers and close alternatives

Screaming Frog runs only this one crawler in our database, so a single User-agent: Screaming Frog SEO Spider group controls everything Screaming Frog fetches through it.

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

We first recorded Screaming Frog SEO Spider on March 17, 2026. Screaming Frog documents it on screamingfrog.co.uk, and we recheck that page before each release.

Which rule Screaming Frog SEO Spider actually follows

Screaming Frog SEO Spider reads exactly one group in robots.txt, the most specific one that names Screaming Frog SEO Spider, and never combines rules across groups. This short file shows the trap:

User-agent: *
Disallow: /private/

User-agent: Screaming Frog SEO Spider
Disallow: /drafts/
  1. Find the group. Screaming Frog SEO Spider looks for a group naming Screaming Frog SEO Spider. 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 Screaming Frog SEO Spider, 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 Screaming Frog SEO Spider if the file also has a User-agent: Screaming Frog SEO Spider group?

No. Once a group names it, Screaming Frog SEO Spider reads only that group. Put every rule you want it to follow inside its own group.

Test yourself: will blocking Screaming Frog SEO Spider remove your pages from AI answers?

Often, yes. Screaming Frog SEO Spider 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: screaming frog seo spider the same as User-agent: Screaming Frog SEO Spider?

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

Should you allow Screaming Frog SEO Spider? Decide by situation

Recommended setting for Screaming Frog SEO Spider 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 Screaming Frog SEO Spider 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 Screaming Frog SEO Spider on your own site

  1. Open /robots.txt on your domain and search for Screaming Frog SEO Spider. If it is not named, it follows User-agent: *.
  2. List the Disallow lines in the group Screaming Frog SEO Spider 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 Screaming Frog SEO Spider even when robots.txt allows it, and that never shows in the file.
  4. Run our AI crawler checker to see how Screaming Frog SEO Spider and every other crawler we track are treated in one pass, including firewall refusals.

Common mistakes with Screaming Frog SEO Spider

The errors we see most often with Screaming Frog SEO Spider in the files and firewalls we test:

  1. Treating Screaming Frog SEO Spider 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 Screaming Frog SEO Spider is rated caution or aggressive. Back the rule with a server-side block.
  3. Blocking Screaming Frog SEO Spider by IP alone. Ranges change; match the token and verify with logs.

All three hide inside a file that looks correct, so check Screaming Frog SEO Spider from outside after every change.

Spotting Screaming Frog SEO Spider in your logs

robots.txt says what Screaming Frog SEO Spider 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 "Screaming Frog SEO Spider" /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 "Screaming Frog SEO Spider" /var/log/nginx/access.log \
  | awk '{print $7}' | sort | uniq -c | sort -rn | head -20

Check the requests are genuine

Anyone can send the Screaming Frog SEO Spider user-agent, so confirm the source before acting on a match:

  • Screaming Frog SEO Spider: we hold no published IP list, so use reverse DNS where the operator documents a hostname and treat an unverifiable Screaming Frog SEO Spider request with caution.

Frequently Asked Questions

What is the official user-agent string for Screaming Frog SEO Spider?
The official user-agent string for Screaming Frog SEO Spider is: Screaming Frog SEO Spider. This is the exact string you must use in robots.txt, Nginx, Apache, or Cloudflare firewall rules to target this bot. User-agent matching in robots.txt is case-insensitive, but the string must be spelled correctly. You can verify that a request genuinely comes from Screaming Frog SEO Spider by performing a reverse-DNS lookup on the source IP - legitimate bots resolve back to their operator's domain.
Is Screaming Frog SEO Spider safe?
Yes, Screaming Frog SEO Spider is a safe and legitimate crawler. It is operated by Screaming Frog, which publicly documents its crawler at an official URL and follows the Robots Exclusion Protocol (RFC 9309). The user-agent string Screaming Frog SEO Spider is verifiable via reverse-DNS lookup on the crawling IP addresses. You can safely allow it unless you have a specific reason to block (e.g., AI training opt-out or SEO tool visibility).
Will blocking Screaming Frog SEO Spider hurt my SEO?
❓ Impact Unknown - The SEO consequences of blocking Screaming Frog SEO Spider are not fully documented. Before blocking, check your analytics to confirm whether this bot generates referral traffic, review your server logs for crawl frequency, and test in a staging environment if possible.
How do I block Screaming Frog SEO Spider in robots.txt?
Add the following lines to your /robots.txt file:
User-agent: Screaming Frog SEO Spider
Disallow: /

This instructs Screaming Frog SEO Spider not to crawl any path on your site. The Disallow: / directive covers the entire domain including subfolders. To only block specific sections, replace / with the path (e.g., Disallow: /blog/). Note: robots.txt is publicly readable - any bot or human can inspect it at yourdomain.com/robots.txt.
Does Screaming Frog SEO Spider respect robots.txt?
Yes - Screaming Frog SEO Spider is a well-behaved bot operated by Screaming Frog. It fetches and parses /robots.txt before crawling any page, following RFC 9309.
How do I verify if Screaming Frog SEO Spider is crawling my site?
Search your web server access logs for the string Screaming Frog SEO Spider (case-insensitive grep: grep -i "Screaming Frog SEO Spider" /var/log/nginx/access.log). You can also check Google Search Console → Coverage → Crawl Stats for Googlebot variants. For Screaming Frog SEO Spider specifically, filter by user-agent in your log analysis tool (GoAccess, AWStats, etc.).
What is the crawl frequency of Screaming Frog SEO Spider?
Screaming Frog SEO Spider crawls at a moderate rate. If you notice excessive traffic in your logs, you can add a Crawl-delay directive: 
User-agent: Screaming Frog SEO Spider
Crawl-delay: 10
(10 second delay between requests).
Can I block Screaming Frog SEO Spider from specific pages only?
Yes. Instead of a global Disallow: / you can restrict Screaming Frog SEO Spider to specific paths:
User-agent: Screaming Frog SEO Spider
Disallow: /private/
Disallow: /staging/
Allow: /

This allows Screaming Frog SEO Spider everywhere except the listed paths. Path matching in robots.txt uses prefix matching - Disallow: /private/ blocks /private/page.html but NOT /public/private/.
Why would I want to block Screaming Frog SEO Spider?
There are two main reasons to block Screaming Frog SEO Spider:
1. Competitive intelligence: Screaming Frog users (your competitors) can analyse your backlink profile, keyword rankings, and site structure. Blocking prevents this.
2. Crawl budget: If your site is large, SEO tool crawlers consume crawl bandwidth without contributing to search rankings. Blocking frees up server resources for search engine bots.
The trade-off: you also become invisible in Screaming Frog's backlink database, meaning links pointing TO your site from other domains won't appear in competitor reports either.

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