Top 100 / nist.gov
95
Mostly one web
14 of 14 AI agents get the full page at https://nist.gov/. Checked 2026-09-25 09:19 UTC.
nist.gov scores 95 out of 100 for machine visibility, number 31 of the 100 most visited websites checked on 2026-09-25. Every AI agent receives the same page a browser does. There is no llms.txt.
youfull pagedegradedblockedunknown
Human
- Status
- 200 → https://www.nist.gov/
- Title
- National Institute of Standards and Technology
- H1
- none
- Words
- 698
- Scripts
- 12 tags · 35 KB
- Meta robots
- none
- Canonical
- https://www.nist.gov/
- Server
- cloudflare
Machine
- robots.txt
- 1 groups · 1 sitemaps
- llms.txt
- missing
- llms-full.txt
- missing
- X-Robots-Tag
- none
- Blocked
- none
- Degraded
- none
- Challenged
- none
Gaps
- lowNo llms.txtOptional, but a short curated index at /llms.txt is the cheapest way to tell assistants what matters on this site.
- infoCanonical points elsewhereCanonical is https://www.nist.gov/. Indexes will credit that URL, not this one.
Every agent
| Agent | Type | robots.txt | Fetch | Words | Result |
|---|---|---|---|---|---|
| Human (Chrome)You | Human | allowed | 2001121 ms | 698 | visible HTTP 200, 698 words |
| GooglebotGoogle · Classic search index. Also feeds AI Overviews. | Search engine | allowed | 2001110 ms | 698 | visible HTTP 200, 698 words |
| Google-ExtendedGoogle · Robots-only token controlling Gemini training use. Never fetches on its own. | AI training | allowed | n/a | visible Robots-only token; allowed by robots.txt | |
| GPTBotOpenAI · Training crawler for OpenAI models. | AI training | allowed | 2001160 ms | 698 | visible HTTP 200, 698 words |
| OAI-SearchBotOpenAI · Indexes for ChatGPT search results and citations. | AI search index | allowed | 2001173 ms | 698 | visible HTTP 200, 698 words |
| ChatGPT-UserOpenAI · Live fetch when a user asks ChatGPT about a page. | AI assistant (live fetch) | allowed | 2001164 ms | 698 | visible HTTP 200, 698 words |
| ClaudeBotAnthropic · Training crawler for Claude models. | AI training | allowed | 2001147 ms | 698 | visible HTTP 200, 698 words |
| Claude-SearchBotAnthropic · Indexes for Claude web search. | AI search index | allowed | 2001154 ms | 698 | visible HTTP 200, 698 words |
| Claude-UserAnthropic · Live fetch when a user asks Claude about a page. | AI assistant (live fetch) | allowed | 2001143 ms | 698 | visible HTTP 200, 698 words |
| PerplexityBotPerplexity | AI search index | allowed | 2001154 ms | 698 | visible HTTP 200, 698 words |
| Perplexity-UserPerplexity | AI assistant (live fetch) | allowed | 2001154 ms | 698 | visible HTTP 200, 698 words |
| BingbotMicrosoft · Bing index. Also feeds Copilot and ChatGPT search. | Search engine | allowed | 2001125 ms | 698 | visible HTTP 200, 698 words |
| Applebot-ExtendedApple · Robots-only token for Apple Intelligence training. | AI training | allowed | n/a | visible Robots-only token; allowed by robots.txt | |
| Meta-ExternalAgentMeta | AI training | allowed | 2001149 ms | 698 | visible HTTP 200, 698 words |
| AmazonbotAmazon · Alexa and Amazon AI. | AI training | allowed | 2001136 ms | 698 | visible HTTP 200, 698 words |
| BytespiderByteDance · Known for ignoring robots.txt. | AI training | allowed | 2001233 ms | 698 | visible HTTP 200, 698 words |
| CCBotCommon Crawl · Open dataset used to train most LLMs. | AI training | allowed | 2001163 ms | 698 | visible HTTP 200, 698 words |
Snapshot
Measured 2026-09-25 09:19 UTC from a residential connection. Sites change their rules often, and sites that verify crawler IPs answer differently to different networks. Run a live comparison to see what nist.gov does right now, from Cloudflare's network.