Google-CloudVertexBot

Google's crawler for Vertex AI Agents. It fetches pages when a site owner asks Google to crawl them to build an agent. Rules for this token only affect those owner-requested crawls.

What happens if you block it

Crawls you (or someone you authorize) request to build Vertex AI Agents on your content are limited. Google Search isn't affected.

Our take

Leave it allowed unless you want to stop owner-requested Vertex AI crawls; it doesn't change your Google Search presence.

robots.txt

To block it:

User-agent: Google-CloudVertexBot
Disallow: /

To allow it explicitly (useful when a wider rule blocks other bots):

User-agent: Google-CloudVertexBot
Allow: /

The operator's own words

Crawling preferences addressed to the Google-CloudVertexBot user agent affect crawls requested by the site owners' for building Vertex AI Agents.Google documentation, checked 2026-11-04

Other Google agents