Browsing agent from Cloudflare
Cloudflare Browser Rendering
In short
Cloudflare Browser Rendering is Cloudflare's browsing agent. Cloudflare Browser Rendering has no robots.txt token, so robots.txt cannot address it and the crawl cannot measure a block rate. It signs requests with Web Bot Auth, so a signature can be checked. Cloudflare documents the automatic request headers; robots.txt handling is up to the customer's script.
- Operator
- Cloudflare
- Purpose
- Task agent All task agent rows. A browsing agent that clicks, fills forms and finishes a job for a person.
- User-agent string
- No exact string is published. What the operator or a third party says: Sends signed Web Bot Auth headers
- robots.txt token
- None. No robots.txt line can address this agent.
- Respects robots.txt
No statement
Cloudflare documents the automatic request headers; robots.txt handling is up to the customer's script. Source, read 2026-11-04.
- Verification
Web Bot Auth signature
Requests carry an HTTP message signature that can be checked against the operator's published key directory. Documentation, read 2026-11-04.
- IP ranges
- Not published.
- Rate behaviour
- Set by the customer.
- Block rate
-
None: the agent has no token, so a robots.txt block rate does not exist.
- Documentation
- blog.cloudflare.com, read 2026-11-04.
Note. Classed as a signed agent since 2025-08-28; always given bot score 1 for Bot Management customers, per Cloudflare.
Allow and refuse lines
This agent has no robots.txt token, so there are no lines to copy. Verify its signature in your WAF or edge rules instead, then allow or refuse the verified identity.
Refusing or allowing in robots.txt states a preference. For this row the operator or its documentation says robots.txt may not govern the fetch, so enforcement belongs in your WAF.
Cloudflare in the Verification Ledger
Signs Browser Rendering traffic. All operators.
- IP lists
- publishes nothing
- Reverse DNS
- publishes nothing
- Key directory
- documented in Browser Rendering automatic request headers
- Cloudflare
- Cloudflare signed agent
- Visa TAP registry
- no public operator-level registration found (checked 2026-11-04)
- Mastercard Agent Pay
- no public operator-level registration found (checked 2026-11-04)
Sources
Last reviewed 2026-11-04