Who blocks AI · #169 in the Majestic Million

robots.txt · checked 9 Nov 2026

Does cnbc.com block AI crawlers?

Yes. cnbc.com’s robots.txt blocks 14 of the 19 AI crawlers we track, including GPTBot, ClaudeBot, Google-Extended and 11 more. Search engines such as Googlebot and Bingbot may crawl it.

GPTBotBlocked OAI-SearchBotBlocked ClaudeBotBlocked PerplexityBotBlocked Google-ExtendedBlocked CCBotBlocked

robots.txt: www.cnbc.com/robots.txt · 95 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`	Google	Partly blocked	line 20 · `Disallow: /native-android-mobile` line 21 · `Disallow: /native-android-tablet` and 8 more
`Bingbot`	Microsoft	Allowed	no rule matches the home page
`DuckDuckBot`	DuckDuckGo	Allowed	no rule matches the home page
`Applebot`	Apple	Partly blocked	line 20 · `Disallow: /native-android-mobile` line 21 · `Disallow: /native-android-tablet` and 8 more
`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	Blocked	line 85 · `Disallow: /` under `User-agent: OAI-SearchBot`
`PerplexityBot`	Perplexity	Blocked	line 85 · `Disallow: /` under `User-agent: PerplexityBot`
`Claude-SearchBot`	Anthropic	Blocked	line 85 · `Disallow: /` under `User-agent: Claude-SearchBot`
`DuckAssistBot`	DuckDuckGo	Allowed	no rule matches the home page
`Amazonbot`	Amazon	Blocked	line 85 · `Disallow: /` under `User-agent: Amazonbot`
`YouBot`	You.com	Allowed	no rule matches the home page

AI training

Bot	Operator	robots.txt	Deciding line
`GPTBot`	OpenAI	Blocked	line 85 · `Disallow: /` under `User-agent: GPTBot`
`ClaudeBot`	Anthropic	Blocked	line 85 · `Disallow: /` under `User-agent: ClaudeBot`
`Google-Extended`	Google	Blocked	line 85 · `Disallow: /` under `User-agent: Google-Extended`
`CCBot`	Common Crawl	Blocked	line 85 · `Disallow: /` under `User-agent: CCBot`
`Applebot-Extended`	Apple	Blocked	line 85 · `Disallow: /` under `User-agent: Applebot-Extended`
`GoogleOther`	Google	Allowed	no rule matches the home page
`Meta-ExternalAgent`	Meta	Blocked	line 85 · `Disallow: /` under `User-agent: Meta-ExternalAgent`
`Bytespider`	ByteDance	Blocked	line 85 · `Disallow: /` under `User-agent: Bytespider`

User-triggered fetchers

Bot	Operator	robots.txt	Deciding line
`ChatGPT-User`	OpenAI	Blocked	line 85 · `Disallow: /` under `User-agent: ChatGPT-User`
`Claude-User`	Anthropic	Blocked	line 85 · `Disallow: /` under `User-agent: Claude-User`
`Perplexity-User`	Perplexity	Blocked	line 85 · `Disallow: /` under `User-agent: Perplexity-User`
`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.cnbc.com/robots.txt · 95 lines

2# robots.txt

4# This file is to prevent the crawling and indexing of certain parts

5# of your site by web crawlers and spiders run by sites like Yahoo!

6# and Google. By telling these "robots" where not to go on your site,

7# you save bandwidth and server resources.

9Sitemap: https://www.cnbc.com/sitemapAll.xml

10Sitemap: https://www.cnbc.com/sitemap_news.xml

11Sitemap: https://www.cnbc.com/sitemapvideoAll.xml

12Sitemap: https://www.cnbc.com/SitemapQuotes.xml

13Sitemap: https://www.cnbc.com/sitemapSelectAll.xml

14Sitemap: https://www.cnbc.com/sitemapproAll.xml

15Sitemap: https://www.cnbc.com/sitemapprovideoAll.xml

16Sitemap: https://www.cnbc.com/sitemapinvestingclubAll.xml

17Sitemap: https://www.cnbc.com/sitemapicvideoprodAll.xml

19User-agent: googlebot

20Disallow: /*native-android-mobile

21Disallow: /*native-android-tablet

22Disallow: /*mobile-native

23Disallow: /preview/

24Disallow: /undefined/

25Disallow: /proplayer

26Disallow: /appchart/*

27Disallow: /search/*

28Disallow: /zephr/*

29Disallow: /blaize/*

31User-agent: GPTBot

32User-Agent: PerplexityBot

33User-agent: Amazonbot

34User-agent: anthropic-ai

35User-agent: AwarioRssBot

36User-agent: AwarioSmartBot

37User-agent: Bytespider

38User-agent: CCBot

39User-agent: HuggingFaceBot

40User-agent: ChatGPT-User

41User-agent: ClaudeBot

42User-agent: Claude-Web

43User-agent: DataForSeoBot

44User-agent: Diffbot

45User-agent: FacebookBot

46User-agent: Google-Extended

47User-agent: Google-NotebookLM

48User-agent: Google-Agent

49User-agent: magpie-crawler

50User-agent: NewsNow

51User-agent: news-please

52User-agent: omgili

53User-agent: omgilibot

54User-agent: peer39_crawler

55User-agent: peer39_crawler/1.0

56User-agent: Scrapy

57User-agent: TurnitinBot

58User-agent: cohere-ai

59User-agent: Applebot-Extended

60User-agent: Meta-ExternalAgent

61User-agent: meta-externalagent

62User-agent: OAI-SearchBot

63User-agent: Claude-User

64User-agent: polymarket-news-bot

65User-agent: polymarket-news-bot

66User-agent: KalshiBot

67User-agent: polymarket-bot

68User-agent: OpenClaw

69User-agent: gold-ai-event-bridge

70User-agent: TradingBot

71User-agent: trading-pipeline

72User-agent: kalshi-bot

73User-agent: BivariateKalshiPipeline

74User-agent: Falcon Trading Platform

75User-agent: StockMarketAnalyser

76User-agent: FinanceApp

77User-agent: polyclaw-ingester

78User-agent: IsoxyTrader

79User-agent: Neo Trading Bot

80User-agent: MerlinChartWizard

81User-agent: investment-dashboard

82User-agent: Claude-SearchBot

83User-agent: Perplexity-User

84Allow: /select/

85Disallow: /

87User-agent: *

88Disallow: /preview/

89Disallow: /undefined/

90Disallow: /proplayer

91Disallow: /appchart/*

92Disallow: /search/*

93Disallow: /search

94Disallow: /zephr/*

95Disallow: /blaize/*

What do the bots actually get?

This page reads robots.txt, which states what cnbc.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 cnbc.com Test a path in the robots.txt tester

History

19 October 2026: first checked.
2 November 2026: started blocking Claude-SearchBot; started blocking Perplexity-User.

Questions

Does cnbc.com block GPTBot?

Yes. cnbc.com’s robots.txt disallows GPTBot from the whole site (line 85: 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 cnbc.com block ClaudeBot?

Yes. cnbc.com’s robots.txt disallows ClaudeBot from the whole site (line 85: Disallow: /). ClaudeBot is Anthropic’s crawler for training data. Checked 9 November 2026.

Does cnbc.com block Google-Extended?

Yes. cnbc.com’s robots.txt disallows Google-Extended from the whole site (line 85: Disallow: /). 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 cnbc.com block PerplexityBot?

Yes. cnbc.com’s robots.txt disallows PerplexityBot from the whole site (line 85: Disallow: /). PerplexityBot is the crawler that indexes pages for Perplexity’s answers. Checked 9 November 2026.

Can ChatGPT search find cnbc.com?

Not through its own crawler. cnbc.com’s robots.txt disallows OAI-SearchBot from the whole site (line 85: Disallow: /). OAI-SearchBot is the crawler behind ChatGPT search; blocking it keeps the site out of ChatGPT’s search answers. Checked 9 November 2026.