Who blocks AI · #998 in the Majestic Million
robots.txt · checked 9 Nov 2026
Does eurekalert.org block AI crawlers?
Yes. eurekalert.org’s robots.txt blocks 1 of the 19 AI crawlers we track, including Bytespider. It also blocks PetalBot and Baiduspider among search engines.
GPTBotAllowedOAI-SearchBotAllowedClaudeBotAllowedPerplexityBotAllowedGoogle-ExtendedAllowedCCBotAllowed- robots.txt
- www.eurekalert.org/robots.txt · 156 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 | Partly blocked | line 9 · Disallow: /build line 10 · Disallow: /bundles and 20 more | |
Bingbot | Microsoft | Partly blocked | line 77 · Disallow: /build line 78 · Disallow: /bundles and 20 more |
DuckDuckBot | DuckDuckGo | Allowed | no rule matches the home page |
Applebot | Apple | Partly blocked | line 45 · Disallow: /build line 46 · Disallow: /bundles and 20 more |
PetalBot | Huawei | Blocked | line 134 · Disallow: / under User-agent: PetalBot |
YandexBot | Yandex | Allowed | no rule matches the home page |
Baiduspider | Baidu | Blocked | line 73 · Disallow: / under User-agent: Baiduspider |
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 | Blocked | line 104 · Disallow: / under User-agent: Bytespider |
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 | Blocked | line 41 · Disallow: / under User-agent: AhrefsBot |
SemrushBot | Semrush | Allowed | no rule matches the home page |
MJ12bot | Majestic | Allowed | no rule matches the home page |
DotBot | Moz | Blocked | line 113 · Disallow: / under User-agent: dotbot |
View www.eurekalert.org/robots.txt · 156 lines
1#
2# robots.txt for https://www.eurekalert.org
3#
4
5sitemap: https://www.eurekalert.org/sitemap.xml
6
7User-agent: *
8User-agent: Googlebot
9Disallow: /build
10Disallow: /bundles
11Disallow: /images
12Disallow: /js
13Disallow: /pdfs
14Disallow: /advancedSearch
15Disallow: /simplesearch
16Disallow: /reporter
17Disallow: /pio
18Disallow: /admin
19Disallow: /news-releases/browse
20Disallow: /multimedia/all
21Disallow: /multimedia/images
22Disallow: /multimedia/video
23Disallow: /multimedia/audio
24Disallow: /bysubject/
25Disallow: /emb_releases/
26Disallow: /emb_releases_ml/
27Disallow: /multimedia/pub/
28Disallow: /multimedia_ml/
29Disallow: /pub_releases/
30Disallow: /pub_releases_ml/
31# Disallow: /language
32# Disallow: /meetings
33# Disallow: /specialtopic
34# Disallow: /newsroom
35# Disallow: /newsportal
36# Disallow: /press
37# Disallow: /tipsheet
38# Disallow: /funderportal
39
40User-agent: AhrefsBot
41Disallow: /
42
43User-agent: Applebot
44Crawl-delay: 10
45Disallow: /build
46Disallow: /bundles
47Disallow: /images
48Disallow: /js
49Disallow: /pdfs
50Disallow: /advancedSearch
51Disallow: /simplesearch
52Disallow: /reporter
53Disallow: /pio
54Disallow: /admin
55Disallow: /news-releases/browse
56Disallow: /multimedia/all
57Disallow: /multimedia/images
58Disallow: /multimedia/video
59Disallow: /multimedia/audio
60Disallow: /bysubject/
61Disallow: /emb_releases/
62Disallow: /emb_releases_ml/
63Disallow: /multimedia/pub/
64Disallow: /multimedia_ml/
65Disallow: /pub_releases/
66Disallow: /pub_releases_ml/
67
68User-agent: AwarioRssBot
69User-agent: AwarioSmartBot
70Disallow: /
71
72User-agent: Baiduspider
73Disallow: /
74
75User-agent: Bingbot
76Crawl-delay: 10
77Disallow: /build
78Disallow: /bundles
79Disallow: /images
80Disallow: /js
81Disallow: /pdfs
82Disallow: /advancedSearch
83Disallow: /simplesearch
84Disallow: /reporter
85Disallow: /pio
86Disallow: /admin
87Disallow: /news-releases/browse
88Disallow: /multimedia/all
89Disallow: /multimedia/images
90Disallow: /multimedia/video
91Disallow: /multimedia/audio
92Disallow: /bysubject/
93Disallow: /emb_releases/
94Disallow: /emb_releases_ml/
95Disallow: /multimedia/pub/
96Disallow: /multimedia_ml/
97Disallow: /pub_releases/
98Disallow: /pub_releases_ml/
99
100User-agent: BLEXBot
101Disallow: /
102
103User-agent: Bytespider
104Disallow: /
105
106User-agent: DataForSeoBot
107Disallow: /
108
109User-agent: Diffbot
110Disallow: /
111
112User-agent: dotbot
113Disallow: /
114
115User-agent: FriendlyCrawler
116Disallow: /
117
118User-agent: ImagesiftBot
119Disallow: /
120
121User-agent: magpie-crawler
122Disallow: /
123
124User-agent: MJ12bot
125Disallow: /
126
127User-agent: omgili
128Disallow: /
129
130User-agent: omgilibot
131Disallow: /
132
133User-agent: PetalBot
134Disallow: /
135
136User-agent: Scrapy
137Disallow: /
138
139User-agent: Timpibot
140Disallow: /
141
142User-agent: Turnitin
143Disallow: /
144
145User-agent: TurnitinBot
146Disallow: /
147
148User-agent: uptimerobot
149Disallow: /
150
151User-agent: viberbot
152Disallow: /
153
154User-agent: YaK
155Disallow: /
156
What do the bots actually get?
This page reads robots.txt, which states what eurekalert.org 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 eurekalert.org Test a path in the robots.txt tester
History
- 19 October 2026: first checked.
Questions
Does eurekalert.org block GPTBot?
No. eurekalert.org’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 eurekalert.org block ClaudeBot?
No. eurekalert.org’s robots.txt lets ClaudeBot crawl the site. ClaudeBot is Anthropic’s crawler for training data. Checked 9 November 2026.
Does eurekalert.org block Google-Extended?
No. eurekalert.org’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 eurekalert.org block PerplexityBot?
No. eurekalert.org’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 eurekalert.org?
Yes. eurekalert.org’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.