Crawlspace: User Agent, robots.txt Rules & Safety Rating

Q: What user-agent string does Crawlspace use?

Crawlspace is reported to identify itself with Crawlspace. That spelling comes from ai.robots.txt, not from Crawlspace, which has not published crawler documentation naming it. Use it in robots.txt as the best available match, and treat a request carrying it as a clue rather than proof of who sent it.

Q: Is Crawlspace safe?

Crawlspace is rated Safe in this directory, meaning there are no credible public reports of abusive crawling under this name. It is a Reported token: Crawlspace has not published documentation for it, so its purpose, crawl rate and robots.txt behaviour are not confirmed by the operator, and anyone can send the same user-agent string. Allow or block it on its stated purpose, and back the robots.txt rule with a firewall rule if the traffic matters to you.

Q: Will blocking Crawlspace hurt my SEO?

✅ No SEO Impact - Blocking Crawlspace does not affect your rankings in Google, Bing, or any other search engine. Crawlspace is an AI crawler, not a traditional search indexer. You can freely block it via User-agent / Disallow: / without any SEO penalty.

Q: How do I block Crawlspace in robots.txt?

Add the following lines to your /robots.txt file: User-agent: Crawlspace Disallow: / This instructs Crawlspace not to crawl any path on your site. To block only specific sections, replace / with the path (e.g., Disallow: /blog/).

Q: How do I verify if Crawlspace is crawling my site?

Search your access logs for Crawlspace (for example grep -i "Crawlspace" /var/log/nginx/access.log). Because the operator publishes no IP ranges or reverse-DNS pattern, a match shows that something used the name, not that Crawlspace sent it.

Quick Facts

User-Agent:: Crawlspace
Category:: Scrapers
Operator:: Crawlspace
Safety:: Safe
Blocking Impact:: Low - No SEO ranking impact
SEO Impact Score:: 2/10
Official docs:: None published by Crawlspace
Named by:: ai.robots.txt

Reported, not operator documented

Crawlspace has not published a crawler page that names Crawlspace. It is listed here because a credible public source does: ai.robots.txt. Crawlspace platform crawler; site describes the product without printing the UA.

What that means for you: the robots.txt rule on this page is the best available spelling, and a well-behaved crawler using this string will honour it, but there is no vendor statement of purpose, crawl rate or robots.txt compliance to rely on. Treat a matching request in your logs as a detection clue, not proof of who sent it, and combine the rule with a firewall rule if the traffic matters to you. If the operator publishes documentation, this profile moves to Official docs.

What is Crawlspace?

Crawlspace is a developer-facing extraction agent operated by Crawlspace. It fetches and structures web content on behalf of applications and AI agents built on Crawlspace's platform. Traffic volume depends on how third-party developers configure it, so monitor your logs if you see heavy activity.

Crawlspace is a developer-facing extraction agent operated by Crawlspace. It fetches and structures web content on behalf of applications and AI agents built on Crawlspace's platform. Traffic volume depends on how third-party developers configure it, so monitor your logs if you see heavy activity.
Crawlspace uses the user-agent token Crawlspace. 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 Crawlspace?

✅ No SEO Impact - Blocking Crawlspace does not affect your rankings in Google, Bing, or any other search engine. Crawlspace is an AI crawler, not a traditional search indexer. You can freely block it via User-agent / Disallow: / without any SEO penalty.

Generally safe to allow; provides legitimate crawling value.

How to block Crawlspace with robots.txt

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

Block completely (robots.txt)

User-agent: Crawlspace
Disallow: /

Allow all (robots.txt)

User-agent: Crawlspace
Allow: /

Block private only (robots.txt)

User-agent: Crawlspace
Disallow: /private/
Disallow: /api/
Disallow: /admin/
Allow: /

Nginx server block

# Nginx: Hard-block Crawlspace
if ($http_user_agent ~* "Crawlspace") {
    return 403 "Bot blocked";
}

Apache .htaccess

# Apache: Hard-block Crawlspace
SetEnvIfNoCase User-Agent "Crawlspace" bad_bot
Order Allow,Deny
Allow from all
Deny from env=bad_bot

Meta robots tag

X-Robots-Tag header

X-Robots-Tag: noindex, nofollow

Is Crawlspace safe to allow?

Crawlspace is rated Safe in this directory, meaning there are no credible public reports of abusive crawling under this name. It is a Reported token: Crawlspace has not published documentation for it, so its purpose, crawl rate and robots.txt behaviour are not confirmed by the operator, and anyone can send the same user-agent string. Allow or block it on its stated purpose, and back the robots.txt rule with a firewall rule if the traffic matters to you.

Crawlspace publishes no IP ranges or reverse-DNS pattern for Crawlspace, so the user-agent string cannot be verified. Rate-limit unusual volume instead of trusting the name.

What does Crawlspace do?

Understanding Crawlspace's purpose helps you decide whether to allow or block it.

Extracts and structures web content for developer applications
Powers AI agents built on the operator platform
Volume depends on third-party developer configuration
Monitor logs if you notice heavy activity
Can be rate-limited via robots.txt or server rules

Frequently Asked Questions

What user-agent string does Crawlspace use?

Crawlspace is reported to identify itself with Crawlspace. That spelling comes from ai.robots.txt, not from Crawlspace, which has not published crawler documentation naming it. Use it in robots.txt as the best available match, and treat a request carrying it as a clue rather than proof of who sent it.

Is Crawlspace safe?

Crawlspace is rated Safe in this directory, meaning there are no credible public reports of abusive crawling under this name. It is a Reported token: Crawlspace has not published documentation for it, so its purpose, crawl rate and robots.txt behaviour are not confirmed by the operator, and anyone can send the same user-agent string. Allow or block it on its stated purpose, and back the robots.txt rule with a firewall rule if the traffic matters to you.

Will blocking Crawlspace hurt my SEO?

✅ No SEO Impact - Blocking Crawlspace does not affect your rankings in Google, Bing, or any other search engine. Crawlspace is an AI crawler, not a traditional search indexer. You can freely block it via User-agent / Disallow: / without any SEO penalty.

How do I block Crawlspace in robots.txt?

Add the following lines to your /robots.txt file:

User-agent: Crawlspace
Disallow: /

This instructs Crawlspace not to crawl any path on your site. To block only specific sections, replace / with the path (e.g., Disallow: /blog/).

Does Crawlspace respect robots.txt?

Not documented. Crawlspace has published no statement that Crawlspace reads robots.txt. A rule for Crawlspace will stop a client that chooses to honour it; for enforcement, add a firewall or CDN rule as well.

How do I verify if Crawlspace is crawling my site?

Search your access logs for Crawlspace (for example grep -i "Crawlspace" /var/log/nginx/access.log). Because the operator publishes no IP ranges or reverse-DNS pattern, a match shows that something used the name, not that Crawlspace sent it.