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@rohanpaul_ai: wow Claude Code allegedly fingerprints China-linked custom routes through tiny prompt formatting changes. The claim con…

X AI KOLs Following ↗ · 3d ago Cached

Controversy erupts as Claude Code is accused of secretly fingerprinting China-linked custom proxy routes through invisible prompt formatting changes, raising serious trust and auditability concerns for AI agents.

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#proxy-detection

@9hills: At first, I didn't really get what Anthropic was trying to do — why detect Claude Code using third-party providers? What's the big deal? Later I realized how clever Anthropic is: by modifying the date format in the system prompt and comparing it with their own logs, they can precisely identify proxy station IPs and accounts. As long as your local configuration points to a third-party URL but the request ultimately goes back to Anthropic, it must be a proxy station. So they can batch-ban those proxy stations.

X AI KOLs Timeline ↗ · 3d ago Cached

Anthropic precisely identifies requests from Claude Code that use third-party providers (proxy stations) by modifying the date format in the system prompt and comparing it with their own logs, thereby batch-banning proxy station IPs and accounts. This technique requires no network upload activity and can even detect proxy usage within enterprise intranet environments.

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