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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

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.

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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