Bot intelligence record

Cloudflare Browser Run

Review first

Cloudflare Browser Run is an AI crawler from Cloudflare used for AI crawler discovery, assistant retrieval, AI search support, or model-related web access; it appears in server logs as `cloudflare-browser-rendering`.

Ai Browser Rendering Signed Agent Confidence: High Verified: Yes robots.txt: Unknown
Operator
Cloudflare
Type
Ai
Source type
Official
Last checked
2026-06-22

User-Agent Pattern

Cloudflare
cloudflare-browser-rendering
Verification note

User-agent strings are identification signals, not proof of identity. Confirm important allow, block, or rate-limit decisions with logs, DNS or IP evidence, request behavior, or operator documentation when available.

Robots.txt Snippet

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User-agent: cloudflare-browser-rendering
Disallow: /

Click the snippet to copy it, or highlight the text manually.

Handling Guidance

Depends

Use this record as bot intelligence, then verify the request source and behavior before allowing, blocking, or rate limiting.

Cloudflare Browser Run is used for AI crawler discovery, assistant retrieval, AI search support, or model-related web access.

Record Details

Verified fields
Operator
Cloudflare
Family
Cloudflare Browser Run
Type
Ai
Purpose
Browser Rendering
Identity type
Signed Agent
Confidence
High
Last verified
2026-06-22
Last checked
2026-06-22
Source type
Official
Verification
Verify Cloudflare Browser Run with the signed-agent headers and the published operator key material; a matching user-agent alone is not enough.
Spoofing risk
Cloudflare Browser Run has medium spoofing risk when judged only by user-agent, but risk drops when signed-agent verification succeeds.

Notes

  • Cloudflare Browser Run is an AI crawler from Cloudflare used for AI crawler discovery, assistant retrieval, AI search support, or model-related web access.
  • Its primary user-agent pattern is cloudflare-browser-rendering; related patterns include cloudflare-browser-rendering; Signature-agent key directory published for Cloudflare Browser Run requests; Browser Run also sends non-configurable request headers..
  • Cloudflare Browser Run is verified with High confidence. The identity type is Signed Agent, and the evidence basis is official operator documentation.
  • Cloudflare Browser Run does not have confirmed robots.txt behavior in the available public evidence.
  • Cloudflare Browser Run should be handled according to the site owner’s AI crawler policy, with allow, block, or rate-limit rules applied deliberately.

Evidence and Source

  • Verify Cloudflare Browser Run with the signed-agent headers and the published operator key material; a matching user-agent alone is not enough.
  • Cloudflare Browser Run traffic is primarily detected by the `cloudflare-browser-rendering` user-agent pattern; related patterns include `cloudflare-browser-rendering; Signature-agent key directory published for Cloudflare Browser Run requests; Browser Run also sends non-configurable request headers.`. Compare source IPs, reverse DNS, request paths, and crawl cadence with Cloudflare infrastructure before trusting the traffic.
  • Cloudflare Browser Run is used for AI crawler discovery, assistant retrieval, AI search support, or model-related web access.
  • Cloudflare Browser Run has medium spoofing risk when judged only by user-agent, but risk drops when signed-agent verification succeeds.

https://developers.cloudflare.com/browser-run/reference/automatic-request-headers/

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