`Google-CloudVertexBot`

Google says Google-CloudVertexBot performs crawls a site owner requested in order to build Vertex AI Agents. It does not affect Google Search. On this crawler, a robots.txt rule matches if it names Google-CloudVertexBot or Googlebot; Google says matching one of a crawler's tokens is enough.

robots.txt token: Google-CloudVertexBot
Operator: Google
Kind: owner_requested
robots.txt: obeys. The vendor says this crawler obeys robots.txt on automatic crawls.
Also matches: Googlebot. Google says one matching token is enough.
HTTP user-agent: Google publishes the HTTP substring Google-CloudVertexBot, not one full browser string, on the common-crawlers page.
IP list: https://developers.google.com/static/crawling/ipranges/common-crawlers.json Listed with Google's common crawlers, which generally use this IP list. A user-agent string can be spoofed. URL returned HTTP 200 on 2026-10-17. Botcard does not copy the list.
Source: List of Google's common crawlers. Retrieved 2026-10-17, page says updated 2026-10-15. CC BY 4.0 (Google Developers page, except as that page notes).

JSON

curl -s https://whosthatbot.com/v1/crawlers/google-cloudvertexbot

Check this token

tools/call with name check_robots is the same check at POST /mcp. The pasted file disallows Google-CloudVertexBot on /docs and allows *. The call does not fetch a host.

curl -s https://whosthatbot.com/mcp -H 'content-type: application/json' -H 'accept: application/json, text/event-stream' -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"check_robots","arguments":{"robots_txt":"User-agent: Google-CloudVertexBot\nDisallow: /\n\nUser-agent: *\nAllow: /\n","path":"/docs","ids":["google-cloudvertexbot"]}}}'

That call returns fetched_target false. This row is disallow via group Google-CloudVertexBot, rule Disallow: /. also_matches_tokens lists Googlebot and is not merged into this decision.