Agent Web Index › harvardlawreview.org
Can AI assistants read harvardlawreview.org?
Measured on 2026-09-19 by asking the site 7 times — once as a browser, once as each of the 6 crawlers that feed ChatGPT, Claude, Perplexity, Gemini, Meta AI, Apple Intelligence and Doubao — and comparing what came back. The AI-training opt-out tokens that never crawl are read from robots.txt instead.
B80 / 100
2 of 6 crawlers can read this page.
More readable than 64% of the 47,315 sites measured so far.
Structured data: WebPage, BreadcrumbList, WebSite, Organization.
What each crawler got back
| Crawler | HTTP | Result | robots.txt |
|---|---|---|---|
| ClaudeBot (Claude) | 403 | challenged | allowed-by-star |
| GPTBot (ChatGPT) | 403 | challenged | blocked |
| OAI-SearchBot (ChatGPT Search) | 200 | can read it | allowed-by-star |
| PerplexityBot (Perplexity) | 403 | challenged | allowed-by-star |
| Google-Extended (Gemini, AI Overviews) a robots.txt token, not a crawler: it controls how already-crawled pages may be used, and never makes a request of its own | — | not opted out | allowed-by-star |
| Meta-ExternalAgent (Meta AI) | 200 | can read it | allowed-by-star |
| Amazonbot (Alexa, Rufus) | 403 | challenged | allowed-by-star |
Cloudflare answers for this domain. Where a crawler above is refused while robots.txt allows it, the rule is applied by that edge, not written by the site — see how often each edge does this.
What to change, in order
- Let in the 3 crawlers your own robots.txt already allows+3 crawlersClaudeBot, PerplexityBot, Amazonbot are turned away before reading the page (served a bot challenge instead of the page), while robots.txt permits them — so this block is not written in your site. Cloudflare answers for this domain. Cloudflare applies AI-crawler blocking at the edge, independently of robots.txt (Security → Bots, plus the managed robots.txt feature). https://developers.cloudflare.com/bots/concepts/bot/ Fixing it takes this domain from 2 to 5 of 6 crawlers.
- Publish llms.txtllms.txt is missing, so an assistant has to discover the site by following links. llms.txt is the emerging convention for telling an assistant which pages actually matter.
- 1 crawler is named and refused in robots.txt — a deliberate choiceGPTBot is blocked by a rule that names it. Nothing to fix here: this page records what is true, not what should be. It is listed so the deliberate part of the block is not confused with the accidental part above.
The checks
- Answers AI agents like it answers people43%
- Readable without JavaScript100%
- robots.txt lets the crawlers in86%
- Facts in JSON-LD100%
- Content reachable, not buried94%
- Publishes a map of itself70%
- Plain structure100%
Sites with a similar score
Embed this score
Put the badge on harvardlawreview.org — it links back here, and re-measures every time this index re-crawls.
<a href="https://shop.lumnika.com/ai-readiness/harvardlawreview.org"><img src="https://shop.lumnika.com/ai-readiness/harvardlawreview.org/badge.svg" alt="AI readability"></a>
Method. 7 live HTTP requests (one per crawler, one as a browser) plus robots.txt, llms.txt, sitemap.xml and security.txt, 12-second timeout each,
from a single vantage point. Blocking AI crawlers is a legitimate choice, not a failure: this page records what is true, not what should be.
Domain comes from a shop-platform seed (Shopify/WooCommerce/Magento/BigCommerce/Shopline fingerprint or JSON-LD price), not the Tranco traffic ranking. One page per domain — the homepage — is audited.
Part of the Agent Web Index, 47,315 domains measured, updated continuously.
Part of the Agent Web Index, 47,315 domains measured, updated continuously.