Crawlspace
Operated by Crawlspace
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
Reported, not operator documented
Crawlspace has not published a crawler page that names Crawlspace. It is listed here on our own evidence. Verified by AI Crawler Check: 62 of the 5,583 valid robots.txt files in the Tranco top 10,000 carry a rule for Crawlspace, so site owners treat it as a real crawler name (how we measure this). That proves the spelling is in use, not who sends it. Crawlspace platform crawler; site describes the product without printing the UA.
What that means for you: the Crawlspace rule on this page is the best available spelling, but Crawlspace has made no statement of purpose, crawl rate or robots.txt compliance. Treat a Crawlspace request in your logs as a clue, not proof of who sent it, and add a firewall rule if that 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?
User-agent / Disallow: / without any SEO penalty.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.
Is Crawlspace safe to allow?
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
Crawlspace in context
Crawlspace is a utility crawler operated by Crawlspace. In plain terms, it harvests pages for a dataset or data product. Our database files it under data scrapers and ranks it Tier 6, the lowest priority: scrapers and tools that offer most sites little or nothing. 37 of the 39 data scrapers in our database share this tier.
Its safety rating is safe and its blocking impact is low. So the decision about Crawlspace rests on what you want from Crawlspace, not on its behaviour. How we rate safety and impact.
How site owners treat Crawlspace
In our own scan of the Tranco top 10,000 (5,583 valid robots.txt files), 62 files (1.1%) name Crawlspace in a User-agent line. That shows site owners treat the token as a real crawler worth a rule. It does not, on its own, prove who operates it.
Does it follow robots.txt?
Crawlspace's operator does not clearly document how it treats robots.txt. Write the Crawlspace rule anyway, then confirm in your logs that its requests stop.
Crawlspace crawlers and close alternatives
Crawlspace runs only this one crawler in our database, so a single User-agent: Crawlspace group controls everything Crawlspace fetches through it.
Other data scrapers that do the same job (harvests pages for a dataset or data product) include Amazon Kendra from Amazon, ApifyBot from Apify, Barkrowler from Babbar, BLEXBot from WebMeUp, coccocbot-web from Unknown, Crawl4AI from Unknown. Deciding about Crawlspace is usually a decision about the whole group, so check how your file treats these too.
We first recorded Crawlspace on March 17, 2026. We could not find a page where Crawlspace names it, so treat the token as reported rather than documented.
Which rule Crawlspace actually follows
Crawlspace reads exactly one group in robots.txt, the most specific one that names Crawlspace, and never combines rules across groups. This short file shows the trap:
User-agent: *
Disallow: /private/
User-agent: Crawlspace
Disallow: /drafts/- Find the group. Crawlspace looks for a group naming
Crawlspace. One exists, so it ignoresUser-agent: *completely. - Apply only that group. It is refused
/drafts/and nothing else. - The surprise.
/private/is open to Crawlspace, because that rule lives in the*group it no longer reads. To keep it out of both, repeatDisallow: /private/inside its own group.
Test yourself: does a rule under User-agent: * apply to Crawlspace if the file also has a User-agent: Crawlspace group?
No. Once a group names it, Crawlspace reads only that group. Put every rule you want it to follow inside its own group.
Test yourself: will blocking Crawlspace remove your pages from AI answers?
Often, yes. Crawlspace 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: crawlspace the same as User-agent: Crawlspace?
Yes. RFC 9309 makes user-agent matching case-insensitive. Paths are a different story: Disallow: /Blog/ does not block /blog/.
Should you allow Crawlspace? Decide by situation
| If you are... | Recommended setting |
|---|---|
| You publish content and want AI answers to cite it | Low stakes either way. It does not decide whether AI answers cite you. |
| You license content and want to stop AI training | Blocking it does not stop training, because Crawlspace is a utility crawler. Block the operator's training crawler instead. |
| You run an online shop | Consider blocking it, especially on price and stock pages that competitors scrape. |
| Your server is under load from bots | Rate-limit before blocking. It is rated safe in our database. |
Check Crawlspace on your own site
- Open
/robots.txton your domain and search forCrawlspace. If it is not named, it followsUser-agent: *. - List the
Disallowlines in the group Crawlspace follows and test your key URLs against them; the longest match wins, andAllowwins a tie. - Look beyond the file. A firewall or bot manager can refuse Crawlspace even when robots.txt allows it, and that never shows in the file.
- Run our GPTBot and ClaudeBot access check to see how Crawlspace and every other crawler we track are treated in one pass, including firewall refusals.
Common mistakes with Crawlspace
The errors we see most often with Crawlspace in the files and firewalls we test:
- Treating Crawlspace as an AI or search crawler. Blocking it has little effect on visibility; decide based on load and what it does with your data.
- Relying on robots.txt alone when Crawlspace is rated caution or aggressive. Back the rule with a server-side block.
- Blocking Crawlspace by IP alone. Ranges change; match the token and verify with logs.
All three hide inside a file that looks correct, so check Crawlspace from outside after every change.
Spotting Crawlspace in your logs
robots.txt says what Crawlspace 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 "Crawlspace" /var/log/nginx/access.log \
| awk '{print $4}' | cut -d: -f1 | sort | uniq -cAnd this shows which paths it requested most, which is the quickest way to see whether your Disallow lines are being respected:
grep -iE "Crawlspace" /var/log/nginx/access.log \
| awk '{print $7}' | sort | uniq -c | sort -rn | head -20Check the requests are genuine
Anyone can send the Crawlspace user-agent, so confirm the source before acting on a match:
Crawlspace: we hold no published IP list, so use reverse DNS where the operator documents a hostname and treat an unverifiable Crawlspace request with caution.
Frequently Asked Questions
What user-agent string does Crawlspace use?
Crawlspace. Evidence that the spelling is in real use comes from our own robots.txt study: 62 of the 5,583 valid robots.txt files in the Tranco top 10,000 name it (fetched October 20, 2026), 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?
Will blocking Crawlspace hurt my SEO?
User-agent / Disallow: / without any SEO penalty.How do I block Crawlspace in robots.txt?
/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?
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?
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.