Browsing agent from Browserbase
Browserbase cloud browsers
In short
Browserbase cloud browsers is Browserbase's browsing agent. Browserbase cloud browsers 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. Browserbase cloud browsers has no operator bot documentation, checked 2026-11-04. Part of Cloudflare's first signed-agents cohort (2025-08-28).
- Operator
- Browserbase
- 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: Signed with Web Bot Auth for customers who enable it
- robots.txt token
- None. No robots.txt line can address this agent.
- Respects robots.txt
No documentation
operator publishes no bot documentation (checked 2026-11-04) on robots.txt; Browserbase sessions follow the customer's code. 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
- Operator publishes no bot documentation (checked 2026-11-04). Closest page read.
Note. Part of Cloudflare's first signed-agents cohort (2025-08-28). Key directory served 2026-11-04. Browserbase also sells a "Verified" browser with real fingerprints, so unsigned sessions are hard to tell apart.
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.
Browserbase in the Verification Ledger
Key directory; signing is a customer feature. All operators.
- IP lists
- publishes nothing
- Reverse DNS
- publishes nothing
- Key directory
- https://www.browserbase.com/.well-known/http-message-signatures-directory
- Cloudflare
- Cloudflare signed agent (cohort of 2025-08-28)
- 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)
Other Browserbase rows
- Stagehand (open-source framework) Task agent
Sources
Last reviewed 2026-11-04