Expired50% confidenceFactExact time
Anthropic's Claude client has contained a detection logic since version v2.91 that is activated when a user sets an unofficial API endpoint.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/19/2026
First Seen
Valid until: 10/17/2026(expired)
Sources
Related Claims
UnverifiedSince version v2.91, the Claude client has contained a detection logic that activates when users set an unofficial API endpoint, checking whether the device's time zone is Asia/Shanghai or Asia/Germany and whether the proxy domain is in a list of 147 obfuscated entries.79% similarVerifiedDuring the build process, Claude Code automatically tests the results by opening the application, clicking buttons, walking through the entire user flow, and verifying against the acceptance criteria defined in Linear.68% similarUnverifiedOpen-source dating products allow users to directly audit the source code to verify data handling logic, a model that has already been validated in products such as Signal66% similarUnverifiedIn a comparative test, the default Claude Code version failed to implement the automatic user location detection feature, while the Ponytail version implemented it correctly.64% similarUnverifiedIn the second round of testing, Claude automatically extended the detection pipeline into a Streamlit web application, including start/stop buttons, a confidence threshold slider, real-time detection statistics, and WebRTC integration.63% similar
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