16 of 32 well-known sites block at least one AI search crawler
AI visibility checkerllms.txt generator and validatorrobots.txt checkerCrawler censusWho blocks AI searchFull block listGuidesAI crawlers Which well-known sites block AI search crawlersA check of 32 recognizable sites: 16 block at least one AI search crawler and 10 are invisible to both ChatGPT and Perplexity. Read from their public robots.txt, September 2026.I ran the AI-visibility checker on 32 well-known sites to see how many let the AI search crawlers read them. 10 block both the crawler ChatGPT uses for citations (OAI-SearchBot) and the one Perplexity uses (PerplexityBot), so those sites cannot be cited by either engine right now.
- ▪AI visibility checkerllms.txt generator and validatorrobots.txt checkerCrawler censusWho blocks AI searchFull block listGuidesAI crawlers Which well-known sites block AI search crawlersA check of 32 recognizable sites: 16 block at least one
- ▪Read from their public robots.txt, September 2026.I ran the AI-visibility checker on 32 well-known sites to see how many let the AI search crawlers read them.
- ▪10 block both the crawler ChatGPT uses for citations (OAI-SearchBot) and the one Perplexity uses (PerplexityBot), so those sites cannot be cited by either engine right now.
Hacker News (AI / LLM) files mainly under ai. We currently carry 4,969 of its stories.
Story provenance
Source · retrieval · rights · ranking — open for full record
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Story provenance
Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | Lastminutedealshq |
| Canonical URL | https://ai-visibility.lastminutedealshq.com/who-blocks-ai-search |
| Publication time | Tue, 15 Sep 2026 12:25:09 +0000 |
| Retrieval time | 2026-09-15T12:36:52.523Z |
| Last seen | 2026-09-15T12:36:52.523Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | _HCHCnL7j4OZ · 1 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
AI visibility checkerllms.txt generator and validatorrobots.txt checkerCrawler censusWho blocks AI searchFull block listGuidesAI crawlers Which well-known sites block AI search crawlersA check of 32 recognizable sites: 16 block at least one AI search crawler and 10 are invisible to both ChatGPT and Perplexity. Read from their public robots.txt, September 2026.I ran the AI-visibility checker on 32 well-known sites to see how many let the AI search crawlers read them. 16 of the 32 block at least one. 10 block both the crawler ChatGPT uses for citations (OAI-SearchBot) and the one Perplexity uses (PerplexityBot), so those sites cannot be cited by either engine right now.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Lastminutedealshq.
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