# Google-CloudVertexBot

> Crawls a site on behalf of a Vertex AI Agent Builder customer who is building an agent over that site. It only visits sites the customer has asked it to.

| field | value |
|---|---|
| operator | Google |
| category | AI search crawlers |
| robots.txt token | `Google-CloudVertexBot` |
| user-agent contains | `Google-CloudVertexBot` |
| robots.txt | obeys robots.txt (documented) |
| verify by | published IP ranges |
| published IP ranges | https://developers.google.com/static/search/apis/ipranges/special-crawlers.json |
| prefixes mirrored | 135 IPv4 / 135 IPv6 |
| operator docs | https://developers.google.com/search/docs/crawling-indexing/overview-google-crawlers |
| last reviewed | 2026-09-01 |

## What blocking it costs you

Third parties can no longer build Vertex AI agents that read your site. Irrelevant to Google Search.

## Full user-agent string

```
Mozilla/5.0 (compatible; Google-CloudVertexBot/1.0; +https://developers.google.com/search/docs/crawling-indexing/google-common-crawlers)
```

## Block it

```
User-agent: Google-CloudVertexBot
Disallow: /
```

## Allow it

```
User-agent: Google-CloudVertexBot
Allow: /
```

JSON: https://www.pathwren.workers.dev/crawler/google-cloudvertexbot.json · index: https://www.pathwren.workers.dev/llms.txt