Safe Official docs Search Engines

Yahoo Slurp

Operated by Yahoo

Quick Facts

User-Agent:
Slurp
Category:
Search Engines
Operator:
Yahoo
Safety:
Safe
Blocking Impact:
Low - No SEO ranking impact
SEO Impact Score:
2/10
Official docs:
help.yahoo.com

Confirmed by the operator

Yahoo names Slurp 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 Yahoo Slurp?

Yahoo Slurp is an AI search-index crawler operated by Yahoo. It collects and indexes web content so it can be surfaced as citations or answers inside Yahoo's AI search experience. Allowing Yahoo Slurp can increase your visibility in AI-powered search results, which is why most sites choose to permit it.

Yahoo Slurp is an AI search-index crawler operated by Yahoo. It collects and indexes web content so it can be surfaced as citations or answers inside Yahoo's AI search experience. Allowing Yahoo Slurp can increase your visibility in AI-powered search results, which is why most sites choose to permit it.
Yahoo Slurp uses the user-agent token Slurp. 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 Yahoo Slurp?

🔶 AI Visibility Trade-off - Blocking Yahoo Slurp 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 Yahoo Slurp with robots.txt

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

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

Yes, Yahoo Slurp is a safe and legitimate crawler operated by Yahoo. It follows the Robots Exclusion Protocol (RFC 9309) and can be controlled with standard robots.txt rules.
Verify by reverse-DNS lookup: legitimate Yahoo Slurp requests resolve to Yahoo's domain.

What does Yahoo Slurp do?

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

  • Indexes web pages for AI-powered search answers
  • Surfaces your content as citations inside AI search results
  • Builds a knowledge index used to answer user questions
  • Allowing it can increase visibility in AI search
  • Respects robots.txt directives

Yahoo Slurp in context

Yahoo Slurp is a search engine crawler operated by Yahoo. In plain terms, it builds a search or answer index. Our database files it under search engines and ranks it Tier 3, mid-priority crawlers with a clear purpose but a smaller audience. 62 of the 63 search engines in our database share this tier.

Its safety rating is safe and its blocking impact is critical. So Yahoo Slurp is both well behaved and costly to lose: the strongest case for allowing it. How we rate safety and impact.

How site owners treat Yahoo Slurp

Our robots.txt study of the Tranco top 10,000 did not track Slurp 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?

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

Yahoo crawlers and close alternatives

Yahoo runs only this one crawler in our database, so a single User-agent: Slurp group controls everything Yahoo fetches through it.

Other search engines that do the same job (builds a search or answer index) include Amzn-SearchBot from Amazon, Applebot from Apple, baidu from Baidu, Baiduspider from Baidu, Baiduspider-favo from Baidu, Baiduspider-image from Baidu. Deciding about Yahoo Slurp is usually a decision about the whole group, so check how your file treats these too.

We first recorded Slurp on March 17, 2026. Yahoo documents it on help.yahoo.com, and we recheck that page before each release.

Which rule Yahoo Slurp actually follows

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

User-agent: *
Disallow: /private/

User-agent: Slurp
Disallow: /drafts/
  1. Find the group. Yahoo Slurp looks for a group naming Slurp. 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 Yahoo Slurp, 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 Yahoo Slurp if the file also has a User-agent: Slurp group?

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

Test yourself: will blocking Yahoo Slurp remove your pages from AI answers?

Often, yes. Yahoo Slurp is a search engine crawler, so pages it cannot fetch can drop out of the answers or results it supports.

Test yourself: is User-agent: slurp the same as User-agent: Slurp?

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

Related: how AI engines choose their sources

Should you allow Yahoo Slurp? Decide by situation

Recommended setting for Yahoo Slurp by type of site
If you are...Recommended setting
You publish content and want AI answers to cite itAllow it. It is how this search engine finds your pages.
You license content and want to stop AI trainingBlocking it does not stop training, because Yahoo Slurp is a search engine crawler. Block the operator's training crawler instead.
You run an online shopAllow it unless it is overloading your servers.
Your server is under load from botsRate-limit before blocking. It is rated safe in our database.

Check Yahoo Slurp on your own site

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

Common mistakes with Yahoo Slurp

The errors we see most often with Yahoo Slurp in the files and firewalls we test:

  1. Blocking Yahoo Slurp to save bandwidth and then wondering why pages drop out of that search engine. Use crawl-rate settings or caching first.
  2. Writing a User-agent: Slurp group to add one rule for Yahoo Slurp and accidentally dropping every rule it used to follow under User-agent: *.
  3. Disallowing CSS and JavaScript folders, which can stop Yahoo Slurp rendering your pages properly.

All three hide inside a file that looks correct, so check Yahoo Slurp from outside after every change.

Spotting Yahoo Slurp in your logs

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

Check the requests are genuine

Anyone can send the Yahoo Slurp user-agent, so confirm the source before acting on a match:

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

Frequently Asked Questions

What is the official user-agent string for Yahoo Slurp?
The official user-agent string for Yahoo Slurp is: Slurp. 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 Yahoo Slurp by performing a reverse-DNS lookup on the source IP.
Is Yahoo Slurp safe?
Yes, Yahoo Slurp is a safe and legitimate crawler operated by Yahoo. It follows the Robots Exclusion Protocol (RFC 9309) and can be controlled with standard robots.txt rules.
Will blocking Yahoo Slurp hurt my SEO?
🔶 AI Visibility Trade-off - Blocking Yahoo Slurp 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 Yahoo Slurp in robots.txt?
Add the following lines to your /robots.txt file:
User-agent: Slurp
Disallow: /

This instructs Yahoo Slurp not to crawl any path on your site. To block only specific sections, replace / with the path (e.g., Disallow: /blog/).
Does Yahoo Slurp respect robots.txt?
Yahoo Slurp is operated by Yahoo 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 Yahoo Slurp is crawling my site?
Search your web server access logs for the string Slurp (case-insensitive: grep -i "Slurp" /var/log/nginx/access.log). Filter by user-agent in your log analytics tool (GoAccess, AWStats, etc.).

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