Who blocks AI · #995 in the Majestic Million
robots.txt · checked 9 Nov 2026
Does hbs.edu block AI crawlers?
No. hbs.edu’s robots.txt lets all 19 AI crawlers we track crawl the site. Search engines such as Googlebot and Bingbot may crawl it.
GPTBotAllowedOAI-SearchBotAllowedClaudeBotAllowedPerplexityBotAllowedGoogle-ExtendedAllowedCCBotAllowed- robots.txt
- www.hbs.edu/robots.txt · 59 lines
- llms.txt
- none
- Checked
- 9 November 2026, as canaicrawl. We check again every week.
Every bot, and the line that decides
Search engines
| Bot | Operator | robots.txt | Deciding line |
|---|---|---|---|
Googlebot | Allowed | no rule matches the home page | |
Bingbot | Microsoft | Partly blocked | line 2 · Disallow: /competitiveness/research/* |
DuckDuckBot | DuckDuckGo | Allowed | no rule matches the home page |
Applebot | Apple | Allowed | no rule matches the home page |
PetalBot | Huawei | Allowed | no rule matches the home page |
YandexBot | Yandex | Allowed | no rule matches the home page |
Baiduspider | Baidu | Allowed | no rule matches the home page |
AI search
| Bot | Operator | robots.txt | Deciding line |
|---|---|---|---|
OAI-SearchBot | OpenAI | Allowed | no rule matches the home page |
PerplexityBot | Perplexity | Allowed | no rule matches the home page |
Claude-SearchBot | Anthropic | Allowed | no rule matches the home page |
DuckAssistBot | DuckDuckGo | Allowed | no rule matches the home page |
Amazonbot | Amazon | Allowed | no rule matches the home page |
YouBot | You.com | Allowed | no rule matches the home page |
AI training
| Bot | Operator | robots.txt | Deciding line |
|---|---|---|---|
GPTBot | OpenAI | Allowed | no rule matches the home page |
ClaudeBot | Anthropic | Allowed | no rule matches the home page |
Google-Extended | Allowed | no rule matches the home page | |
CCBot | Common Crawl | Allowed | no rule matches the home page |
Applebot-Extended | Apple | Allowed | no rule matches the home page |
GoogleOther | Allowed | no rule matches the home page | |
Meta-ExternalAgent | Meta | Allowed | no rule matches the home page |
Bytespider | ByteDance | Allowed | no rule matches the home page |
User-triggered fetchers
| Bot | Operator | robots.txt | Deciding line |
|---|---|---|---|
ChatGPT-User | OpenAI | Allowed | no rule matches the home page |
Claude-User | Anthropic | Allowed | no rule matches the home page |
Perplexity-User | Perplexity | Allowed | no rule matches the home page |
MistralAI-User | Mistral | Allowed | no rule matches the home page |
Meta-ExternalFetcher | Meta | Allowed | no rule matches the home page |
SEO tools
| Bot | Operator | robots.txt | Deciding line |
|---|---|---|---|
AhrefsBot | Ahrefs | Allowed | no rule matches the home page |
SemrushBot | Semrush | Allowed | no rule matches the home page |
MJ12bot | Majestic | Allowed | no rule matches the home page |
DotBot | Moz | Allowed | no rule matches the home page |
View www.hbs.edu/robots.txt · 59 lines
1User-agent: Bingbot
2Disallow: /competitiveness/research/*
3
4User-agent: *
5Crawl-delay: 2
6Disallow: /trash
7Disallow: /js/trash
8Disallow: /search*
9Disallow: /search/trash
10Disallow: /search/ssi/trash
11Disallow: /search/ssi/
12Disallow: /ssi/trash
13Disallow: /leadership/faculty
14Disallow: /shared/docs
15Disallow: /redirects.txt
16Disallow: /creating-emerging-markets/interviews/*?*&*
17Disallow: /creating-emerging-markets/video-database/Pages/default.aspx?.*
18Disallow: /competitiveness/forum/2014-04-25.html
19Disallow: /PortraitProject/2002/images/AnonymousStudent.jpg
20Disallow: /PortraitProject/2002/images/AnonymousStudent-thumb.jpg
21Disallow: /PortraitProject/2002/AnonymousStudent.html
22Disallow: /user_testing_tmp
23Disallow: /competitiveness/Documents/energy-agenda-Jan2627.pdf
24Disallow: /competitiveness/Documents/energy-bio-book-Jan2627.pdf
25Disallow: /competitiveness/Documents/energy-logistics-Jan2627.pdf
26Disallow: /competitiveness/Documents/energy-roster-Jan2627.pdf
27Disallow: /competitiveness/Documents/energy-research-Jan2627.pdf
28Disallow: /competitiveness/research/Pages/*
29Disallow: /competitiveness/media/Pages/*
30Disallow: /faculty/research/publications/Pages/default.aspx?*&*
31Disallow: /faculty/research/seminars-conferences/Pages/default.aspx?.*
32Disallow: /faculty/Pages/browse.aspx?*&*
33Disallow: /doctoral/Pages/search.aspx?*
34Disallow: /about/video.aspx?*
35Disallow: /managing-the-future-of-work/podcast/Pages/default.aspx?*&*
36Disallow: /mba/admissions/Pages/landing-page.aspx
37Disallow: /mba/academic-experience/joint-degree-programs/school-of-engineering-and-applied-sciences/Pages/msmba-engineering-sciences.aspx
38Disallow: /mba/academic-experience/joint-degree-programs/life-sciences-harvard-graduate-school-arts-sciences/Pages/MSMBA-Biotechnology-Life-Sciences-landing0710-9411.aspx
39Disallow: /mba/academic-experience/FIELD/Pages/default.aspx
40Disallow: /mba/academic-experience/FIELD/Pages/benefits-of-global-partnership.aspx
41Disallow: /mba/academic-experience/FIELD/Pages/propose-a-project.aspx
42Disallow: /mba/academic-experience/FIELD/Pages/timeline.aspx
43Disallow: /mba/admissions/da2015/Pages/default.aspx
44Disallow: /mba/admissions/nextstopHBS/Pages/default.aspx
45Disallow: /mba/admissions/svmp/Pages/default.aspx
46Disallow: /mba/admissions/waitlist/Pages/default.aspx
47Disallow: /mba/admissions/interviews
48Disallow: /mba/admissions/interviews/
49Disallow: /mba/admissions/2-plus-2-interviews
50Disallow: /mba/admissions/2-plus-2interviews/
51Disallow: /mba/cost-of-attendance-class-of-2022.aspx
52Disallow: /openforum/openforum.hbs.org/challenge/cdilemma
53Disallow: /openforum/openforum.hbs.org/challenge/alumni-board-ideas
54Disallow: /openforum/openforum.hbs.org/challenge/managing-health-care-delivery-2015-2016
55Disallow: /openforum/openforum.hbs.org/challenge/dilemma
56Disallow: /openforum/openforum.hbs.org/index.html
57
58Sitemap: http://www.hbs.edu/sitemap.xml
59
What do the bots actually get?
This page reads robots.txt, which states what hbs.edu asks of crawlers. A firewall or CDN can still refuse a bot that robots.txt allows. The live check requests the page as each bot and shows the status it gets.
Run a live check on hbs.edu Test a path in the robots.txt tester
History
- 19 October 2026: first checked.
Questions
Does hbs.edu block GPTBot?
No. hbs.edu’s robots.txt lets GPTBot crawl the site. GPTBot is OpenAI’s crawler for training data; blocking it doesn’t affect ChatGPT search, which uses OAI-SearchBot. Checked 9 November 2026.
Does hbs.edu block ClaudeBot?
No. hbs.edu’s robots.txt lets ClaudeBot crawl the site. ClaudeBot is Anthropic’s crawler for training data. Checked 9 November 2026.
Does hbs.edu block Google-Extended?
No. hbs.edu’s robots.txt lets Google-Extended crawl the site. Google-Extended is the token that controls whether Google may use pages for Gemini training and grounding; it doesn’t affect Google Search. Checked 9 November 2026.
Does hbs.edu block PerplexityBot?
No. hbs.edu’s robots.txt lets PerplexityBot crawl the site. PerplexityBot is the crawler that indexes pages for Perplexity’s answers. Checked 9 November 2026.
Can ChatGPT search find hbs.edu?
Yes. hbs.edu’s robots.txt lets OAI-SearchBot crawl the site. OAI-SearchBot is the crawler behind ChatGPT search; blocking it keeps the site out of ChatGPT’s search answers. Checked 9 November 2026.