Yahoo Slurp
SafeUser-agent: Slurp
Category: Search Engines
SEO impact if blocked: 2/10
Yahoo
1 crawler operated by Yahoo
Who Yahoo is, for site owners
Yahoo operates 1 crawler in our directory, filed under Search Engines. Its crawl behaviour is rated safe.
Blocking Yahoo carries an SEO impact score of 2/10. Blocking impact is rated: Low - No SEO ranking impact.
Our recommendation for Yahoo: Generally safe to allow; provides legitimate crawling value.
Yahoo at a glance
| Operator | Yahoo |
|---|---|
| Crawler in directory | 1 |
| Categories | Search Engines |
| SEO impact if blocked | 2/10 |
| Crawl behaviour | 1 rated safe |
| Official crawler docs | Yahoo crawler documentation |
Crawler operated by Yahoo
What Yahoo's crawlers are for
Yahoo runs 1 crawler in our database. Grouped by the job each one does:
- a search engine crawler:
Slurp
The highest-priority token is Tier 3. That makes Yahoo a lower-priority operator for most sites: worth a deliberate decision, but rarely the one that decides your visibility.
How site owners treat Yahoo
None of Yahoo's tokens were among the names tracked in our robots.txt study of the Tranco top 10,000, which usually means few large sites write rules for them yet. Your own logs are the best evidence of how often they visit.
Writing one policy for Yahoo
A robots.txt file cannot say "Yahoo"; it can only name Yahoo's tokens, one group at a time. With a single token, one group is the whole policy.
# One token controls everything Yahoo fetches through it
User-agent: Slurp
Disallow: /private/
Allow: /- Decide per job, not per company. Training, search and user-triggered fetching have different trade-offs, even from the same operator.
- Name every token you mean. A token you leave out follows
User-agent: *. - Repeat shared rules. A named group ignores the
*group, so copy anyDisallowlines you still want it to obey. - Verify from outside. Run the AI crawlability checker after any change to see the result for each Yahoo token, including firewall refusals.
Test yourself: does User-agent: Yahoo block all of Yahoo's crawlers?
No. robots.txt matches crawler tokens, not company names. Use the token Slurp.
Test yourself: if you block one Yahoo token, are the others blocked too?
No. Each token is read separately. Blocking one leaves the rest following whatever group applies to them.
Each Yahoo crawler, explained
A one-paragraph brief for every Yahoo token in our database, covering what it does, how it treats robots.txt and how often large sites write rules for it:
- Yahoo Slurp (
Slurp, Tier 3): a search engine crawler that builds a search or answer index. Rated safe. 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. Not tracked in our robots.txt study.
Common mistakes with Yahoo's crawlers
The errors we see most often with Yahoo's crawlers in the files and firewalls we test:
- Blocking Yahoo's crawlers to save bandwidth and then wondering why pages drop out of that search engine. Use crawl-rate settings or caching first.
- Writing a
User-agent: Slurpgroup to add one rule for Yahoo's crawlers and accidentally dropping every rule it used to follow underUser-agent: *. - Disallowing CSS and JavaScript folders, which can stop Yahoo's crawlers rendering your pages properly.
All three hide inside a file that looks correct, so check Yahoo's crawlers from outside after every change.
What our own data shows about Yahoo
Everything below comes from the AI Crawler Check bot database and our two most recent robots.txt scans of the Tranco top 10,000, not from Yahoo's marketing. Yahoo has one token in our database, so the whole picture fits in one place.
Slurp in our records
We first recorded Slurp on March 17, 2026. Yahoo documents it on help.yahoo.com, and we recheck that page before each release. No file in our top-10,000 scans names Slurp, so any rule you write for it puts you ahead of almost every large site.
Among the 63 search engines in our database, Slurp sits 25th by priority (Tier 3), level with AdIdxBot, Amzn-SearchBot, Applebot, baidu. 62 of the 63 share its safe rating. Other operators with a crawler that builds a search or answer index: AddSearchBot (AddSearch, Tier 2), AIWebIndex (Lyrenth, Tier 2), atlassian-bot (Atlassian, Tier 2), AzureAI-SearchBot (Microsoft, Tier 2), Cloudflare-AI-Search (Cloudflare, Tier 2). A policy for Slurp is usually a policy for these too.
A decision record for Slurp
Teams that review crawlers once a quarter keep one short entry per token, so anyone can see why a rule exists and when it was last checked. Filled in from our data, the Slurp entry reads:
- Operator and job: Yahoo; it builds a search or answer index.
- Priority and behaviour: Tier 3, rated safe, blocking impact critical.
- Suggested starting point: Allow by default; revisit if it costs you bandwidth.
- Enforcement: Slurp's operator does not clearly document how it treats robots.txt. Write the Slurp rule anyway, then confirm in your logs that its requests stop.
User-agent: Slurp
Allow: /Paste the line into the validator with one of your own URLs before it goes live. Revisit the Slurp entry once a quarter, or when Yahoo publishes a new token next to it.
Checking Slurp on your own site
Because Yahoo runs only Slurp in our records, one check covers the whole operator. Search your access logs for the string Slurp over the last 30 days, note how many requests it made and which paths it asked for, then compare that with what your robots.txt allows. Match the requests against what Yahoo publishes about the crawler, since that page is the only authority on its behaviour. A Tier 3 crawler rated safe rarely needs more than a quarterly look, and our log checker does the counting for you.
How top sites treat Yahoo's crawlers
From our robots.txt study of the Tranco top 10,000 (5,583 valid files, fetched October 20, 2026):
None of the tokens for Yahoo's crawlers is tracked by name in our study. For scale, 20.1% of top-site files block at least one AI training crawler and 4.3% refuse every unnamed crawler with User-agent: * and Disallow: /, which would catch Yahoo's crawlers too.
More questions about Yahoo
- Will blocking Yahoo affect my Google rankings?
- Only if one of its tokens is a Google search crawler. None of Yahoo's tokens are Googlebot, so classic Google rankings are unaffected.
- How quickly does a robots.txt change take effect for Yahoo?
- Crawlers cache robots.txt, commonly for up to a day. Expect a change to apply within about 24 hours, and confirm it in your logs.
- Can I allow Yahoo on some sections and block it on others?
- Yes. Inside the group for
Slurp, addDisallowlines for the paths to keep private andAllowlines for exceptions. The longest matching rule wins. - Does blocking Yahoo delete content it already collected?
- No. robots.txt only controls future visits. For content already collected, check whether Yahoo offers a removal or opt-out process.
- Is a firewall block better than robots.txt for Yahoo?
- A firewall enforces the decision, while robots.txt asks politely. Many operators recommend robots.txt because blocking their IPs can stop them reading your rules at all. Use robots.txt first, and add a firewall rule only if requests continue.
A five-minute Yahoo review
- Confirm the token. Compare the user-agent in your logs with the tokens listed on this page. A close spelling is not the same crawler.
- Decide the outcome per crawler. Use the briefs above to choose allow, limit or block for each token.
- Write the group. Add or edit one
User-agentgroup per decision and repeat any shared rules inside it. - Publish and wait. Allow about a day for crawlers to fetch the new file.
- Confirm the result. Check your logs, then run the robots.txt AI crawler test to see the outcome from outside, including any firewall layer.
How to block or allow Yahoo in robots.txt
This rule covers the single crawler Yahoo operates. Add it to the robots.txt file at the root of your domain.
Block Yahoo completely
User-agent: Slurp
Disallow: /
Allow Yahoo explicitly
User-agent: Slurp
Allow: /
These Yahoo rules ask; they do not enforce. If a Yahoo token ignores them, block it at the server or CDN. Paths are case-sensitive, and each rule matches the token, not the full user-agent string.
Frequently asked questions about Yahoo
What crawler does Yahoo run?
Yahoo operates 1 crawler in our directory: Yahoo Slurp (user-agent Slurp).
Should I block Yahoo?
Generally safe to allow; provides legitimate crawling value. The SEO impact score for blocking is 2/10, where 10 means blocking costs you the most visibility.
How do I block Yahoo in robots.txt?
Add the following to robots.txt at your domain root: User-agent: Slurp then Disallow: /.
Does blocking Yahoo hurt my search rankings?
Blocking impact is rated: Low - No SEO ranking impact. Yahoo Slurp is a search-indexing crawler, so blocking it can remove your pages from the corresponding search results. Block it only if you intend to leave that index. Every crawler in this group is rated the same way, so there is no subset here that is safe to block for ranking purposes.