Every AI bot · Anthropic

Claude-SearchBot

Anthropic's crawler that builds an index for AI search answers.

In robots.txt: User-agent: Claude-SearchBot

Named by1.8%of readable robots.txt files on the top 1M (10,987 of 600,979)

Of those, block it36.2%shut it out of the whole site (3,977 of 10,987)

Same sites, since CC-MAIN-2026-34+0.0 ptsshare of the same 394,690 sites that block it by name: 0.5% → 0.6%

Via Cloudflare's file2.9%of its blocks come from Cloudflare's ready-made robots.txt (115 of 3,977)

36.2%

31.7%

32.1%

Block the whole site: 3,977Block some paths: 3,479Name it but allow it: 3,531

Every robots.txt file on the top 1M that names Claude-SearchBot, by what the rules that apply to it say.

Anthropic's other bots

Sites often treat one company's bots differently, depending on what each is for.

Bot	Purpose	Files naming it	Of those, block it
ClaudeBot	Collects pages to train AI	70,491	71.5%
anthropic-ai	Purpose not documented	28,018	62.2%
claude-web	Fetches a page for a chatbot user	21,076	65.7%
Claude-User	Fetches a page for a chatbot user	9,951	32.9%

Who does what

The highest-ranked sites on the top million in each group. Click one to see its whole robots.txt verdict.

Block it

Block some paths

Name it and allow it

Lists skip sites we don't showcase (adult content).

What this means for you: blocking Claude-SearchBot can keep your pages out of Anthropic's AI search answers, including any links back to you. Decide each bot on what it's for, not who runs it.