Who blocks AI · #431 in the Majestic Million
Does oreilly.com block AI crawlers?
Yes. oreilly.com’s robots.txt blocks 5 of the 19 AI crawlers we track, including GPTBot, CCBot, Meta-ExternalAgent and 2 more. It also blocks PetalBot, YandexBot and Baiduspider among search engines.
GPTBotBlockedOAI-SearchBotPartly blockedClaudeBotPartly blockedPerplexityBotPartly blockedGoogle-ExtendedPartly blockedCCBotBlocked- robots.txt
- www.oreilly.com/robots.txt · 149 lines
- llms.txt
- found
- 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 82 · Disallow: /member/login/*?next= | |
Bingbot | Microsoft | Partly blocked | line 82 · Disallow: /member/login/*?next= |
DuckDuckBot | DuckDuckGo | Allowed | no rule matches the home page |
Applebot | Apple | Partly blocked | line 82 · Disallow: /member/login/*?next= |
PetalBot | Huawei | Blocked | line 69 · Disallow: / under User-agent: PetalBot |
YandexBot | Yandex | Blocked | line 142 · Disallow: / under User-agent: YandexBot |
Baiduspider | Baidu | Blocked | line 69 · Disallow: / under User-agent: Baiduspider |
AI search
| Bot | Operator | robots.txt | Deciding line |
|---|---|---|---|
OAI-SearchBot | OpenAI | Partly blocked | line 104 · Disallow: /member/login/*?next= |
PerplexityBot | Perplexity | Partly blocked | line 82 · Disallow: /member/login/*?next= |
Claude-SearchBot | Anthropic | Partly blocked | line 104 · Disallow: /member/login/*?next= |
DuckAssistBot | DuckDuckGo | Partly blocked | line 82 · Disallow: /member/login/*?next= |
Amazonbot | Amazon | Blocked | line 142 · Disallow: / under User-agent: Amazonbot |
YouBot | You.com | Partly blocked | line 104 · Disallow: /member/login/*?next= |
AI training
| Bot | Operator | robots.txt | Deciding line |
|---|---|---|---|
GPTBot | OpenAI | Blocked | line 142 · Disallow: / under User-agent: GPTBot |
ClaudeBot | Anthropic | Partly blocked | line 104 · Disallow: /member/login/*?next= |
Google-Extended | Partly blocked | line 104 · Disallow: /member/login/*?next= | |
CCBot | Common Crawl | Blocked | line 142 · Disallow: / under User-agent: CCBot |
Applebot-Extended | Apple | Partly blocked | line 104 · Disallow: /member/login/*?next= |
GoogleOther | Allowed | no rule matches the home page | |
Meta-ExternalAgent | Meta | Blocked | line 142 · Disallow: / under User-agent: meta-externalagent |
Bytespider | ByteDance | Blocked | line 142 · Disallow: / under User-agent: Bytespider |
User-triggered fetchers
| Bot | Operator | robots.txt | Deciding line |
|---|---|---|---|
ChatGPT-User | OpenAI | Partly blocked | line 82 · Disallow: /member/login/*?next= |
Claude-User | Anthropic | Allowed | no rule matches the home page |
Perplexity-User | Perplexity | Partly blocked | line 82 · Disallow: /member/login/*?next= |
MistralAI-User | Mistral | Partly blocked | line 104 · Disallow: /member/login/*?next= |
Meta-ExternalFetcher | Meta | Allowed | no rule matches the home page |
SEO tools
| Bot | Operator | robots.txt | Deciding line |
|---|---|---|---|
AhrefsBot | Ahrefs | Partly blocked | line 24 · Disallow: /images/ line 25 · Disallow: /graphics/ and 17 more |
SemrushBot | Semrush | Allowed | no rule matches the home page |
MJ12bot | Majestic | Allowed | no rule matches the home page |
DotBot | Moz | Partly blocked | line 104 · Disallow: /member/login/*?next= |
View www.oreilly.com/robots.txt · 149 lines
What do the bots actually get?
This page reads robots.txt, which states what oreilly.com 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 oreilly.com Test a path in the robots.txt tester
History
- 19 October 2026: first checked.
Questions
Does oreilly.com block GPTBot?
Yes. oreilly.com’s robots.txt disallows GPTBot from the whole site (line 142: Disallow: /). GPTBot is OpenAI’s crawler for training data; blocking it doesn’t affect ChatGPT search, which uses OAI-SearchBot. Checked 9 November 2026.
Does oreilly.com block ClaudeBot?
Partly. oreilly.com’s robots.txt keeps ClaudeBot out of some paths, such as /member/login/*?next=, and lets it crawl the rest. ClaudeBot is Anthropic’s crawler for training data. Checked 9 November 2026.
Does oreilly.com block Google-Extended?
Partly. oreilly.com’s robots.txt keeps Google-Extended out of some paths, such as /member/login/*?next=, and lets it crawl the rest. 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 oreilly.com block PerplexityBot?
Partly. oreilly.com’s robots.txt keeps PerplexityBot out of some paths, such as /member/login/*?next=, and lets it crawl the rest. PerplexityBot is the crawler that indexes pages for Perplexity’s answers. Checked 9 November 2026.
Can ChatGPT search find oreilly.com?
Partly. oreilly.com’s robots.txt keeps OAI-SearchBot out of some paths, such as /member/login/*?next=, and lets it crawl the rest. OAI-SearchBot is the crawler behind ChatGPT search; blocking it keeps the site out of ChatGPT’s search answers. Checked 9 November 2026.