Cloudflare Browser Run Crawler

Fully verifiable

The crawler behind the /crawl endpoint of Cloudflare's Browser Run (Browser Rendering) developer product, which crawls third-party websites on behalf of Cloudflare customers building applications on the platform. Its user agent is not configurable, and every request is signed with Web Bot Auth HTTP message signatures that site owners can verify against Cloudflare's published key directory.

Operated by Cloudflare · Official documentation

User agents

Patterns this directory matches, with real observed strings.

regexCloudflareBrowserRenderingCrawler/[\d.]+
observedCloudflareBrowserRenderingCrawler/1.0

How to verify

Fetch the Web Bot Auth key directory

curl -s https://web-bot-auth.cloudflare-browser-rendering-085.workers.dev/.well-known/http-message-signatures-directory

Good Bot Practices scorecard

Identifies honestly
Stable UA token documented (1 pattern)
Verifiable
Fully verifiable
Respects robots.txt
Honors robots.txt (token: CloudflareBrowserRenderingCrawler)
Behaves
Crawl-rate behavior is operator-declared; not machine-verifiable from this dataset
Reachable operator
Operator and documentation published

Measured against the Good Bot Practices.