cambridge.org: what it tells AI crawlers

On 27 October 2026, cambridge.org's robots.txt allowed all of GPTBot, OAI-SearchBot, ClaudeBot, Claude-SearchBot, Google-Extended, PerplexityBot and CCBot.

Last verified 2026-10-28 03:59 UTC (daily run of 2026-10-27). Proof for that day.

Panel

top 1k (Tranco)

robots.txt

ok (HTTP 200) · https://cambridge.org/robots.txt
unchanged since 2026-10-26 · sha256 dddc775cf11f6d53… · view as recorded

The * group

allows applies to every agent without its own group

Per AI bot, 2026-10-27

Other signals

robots.txt as recorded sha256 02f5627ec71129c6…

User-agent: *
Allow: /concrete/*.css
Allow: /concrete/*.js
Allow: /concrete/*.jpg
Allow: /concrete/*.svg
Allow: /concrete/*.png
Allow: /concrete/*.gif
Allow: /packages/*.css
Allow: /packages/*.js
Allow: /packages/*.jpg
Allow: /packages/*.svg
Allow: /packages/*.png
Allow: /packages/*.gif
Allow: /blocks/*.css
Allow: /blocks/*.js
Allow: /blocks/*.jpg
Allow: /blocks/*.svg
Allow: /blocks/*.png
Allow: /blocks/*.gif
Allow: /tools/packages/cambridge_themes/getSocialImage
Allow: /tools/packages/cambridge_themes/miniCart*
Disallow: /blocks
Disallow: /concrete
Disallow: /config
Disallow: /controllers
Disallow: /css
Disallow: /elements
Disallow: /helpers
Disallow: /jobs
Disallow: /js
Disallow: /languages
Disallow: /libraries
Disallow: /mail
Disallow: /models
Disallow: /packages
Disallow: /single_pages
Disallow: /themes
Disallow: /tools
Disallow: /updates
Disallow: /branding
Disallow: /wm-ecommerce-web/academic/addtocart
Disallow: /wm-ecommerce-web/english/addtocart
Disallow: /wm-ecommerce-web/academic/cart
Disallow: /wm-ecommerce-web/english/cart
Disallow: /wm-ecommerce-web/education/cart
Disallow: */c5catalogue/
Disallow: /resources
Allow: /aus/interchange
Allow: /files/*.jpg
Allow: /files/*.jpeg
Allow: /files/*.png
Allow: /files/*.gif
Disallow: /files
Disallow: /series/
Disallow: /titles/
Disallow: /uk
Allow: /uk/bookshop
Allow: /uk/education
Allow: /uk/jobs
Allow: /uk/linguistics
Allow: /uk/chemistry
Allow: /uk/stm
Allow: /uk/resources
User-agent: Twitterbot
Disallow: *
Disallow: /download_file/
Disallow: /manifests
Disallow: /infographic

robots.txt versions

Timeline of changes

Reconstructed history (Common Crawl)

From Common Crawl's robots.txt captures: what CCBot was served, one crawl per quarter. A separate series from the daily observations above; a 403 here means Common Crawl was refused, not this ledger.

Evidence

Every daily observation of cambridge.org is a leaf in that day's Merkle tree. Proof of the robots.txt line for 2026-10-27: audit path (JSON), day root and OpenTimestamps proof (complete (bitcoin block 973493)).

API: https://infrarabbit.com/crawlers/api/v1/policy/cambridge.org