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fix(robots-for-ai-crawlers): update Anthropic crawler citation and user-agents #285

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jdevalk merged 1 commit into from
Nov 2, 2026
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fix(robots-for-ai-crawlers): update Anthropic crawler citation and user-agents #285

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16 changes: 12 additions & 4 deletions src/content/spec/agent-readiness/robots-for-ai-crawlers.md
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Expand Up @@ -7,13 +7,13 @@ status: recommended
order: 40
appliesTo: [all]
relatedSlugs: [robots-txt, content-signals, tdmrep, agent-readiness-overview, llms-txt, web-bot-auth]
updated: "2026-05-29T12:14:17.000Z"
updated: "2026-10-29T00:00:00.000Z"
sources:
- title: "OpenAI — GPTBot"
url: "https://platform.openai.com/docs/bots"
publisher: "OpenAI"
- title: "Anthropic — Crawlers"
url: "https://support.anthropic.com/en/articles/8896518-does-anthropic-crawl-data-from-the-web-and-how-can-site-owners-block-the-crawler"
url: "https://support.claude.com/en/articles/8896518-does-anthropic-crawl-data-from-the-web-and-how-can-site-owners-block-the-crawler"
publisher: "Anthropic"
- title: "Google — Google-Extended"
url: "https://developers.google.com/crawling/docs/crawlers-fetchers/google-common-crawlers#google-extended"
Expand All @@ -32,7 +32,9 @@ The big ones, as of 2026:
- **GPTBot** — OpenAI training crawler.
- **OAI-SearchBot** — OpenAI retrieval crawler used by ChatGPT browsing.
- **ChatGPT-User** — on-demand fetches when a ChatGPT user asks for a URL.
- **ClaudeBot** — Anthropic training and retrieval crawler.
- **ClaudeBot** — Anthropic training crawler.
- **Claude-SearchBot** — Anthropic search-indexing crawler.
- **Claude-User** — on-demand fetches when a Claude user's question needs a page.
- **anthropic-ai** — legacy Anthropic user-agent, still seen.
- **Google-Extended** — opts out of Gemini and Vertex training without affecting Search.
- **Applebot-Extended** — opts out of Apple Intelligence training without affecting Siri/Spotlight.
Expand Down Expand Up @@ -72,6 +74,12 @@ Allow: /
User-agent: ChatGPT-User
Allow: /

User-agent: Claude-SearchBot
Allow: /

User-agent: Claude-User
Allow: /

User-agent: PerplexityBot
Allow: /

Expand All @@ -91,7 +99,7 @@ Rules of thumb:
## Common mistakes

- Blocking `*` and forgetting that this also blocks Google.
- Blocking only `GPTBot` and assuming no OpenAI surface can see your site — `OAI-SearchBot` and `ChatGPT-User` are separate.
- Blocking only `GPTBot` and assuming no OpenAI surface can see your site — `OAI-SearchBot` and `ChatGPT-User` are separate. The same split applies to Anthropic: `ClaudeBot`, `Claude-SearchBot` and `Claude-User` are governed independently.
- Leaving stale user-agents from 2023 lists. Names change; the vendor docs are the source of truth.
- Treating disallow as deletion. Content already in training sets stays there.

Expand Down
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