This post was created with AI assistance and reviewed for accuracy before publishing.
When the government ordered Anthropic to block foreign nationals from Fable 5, engineers faced an impossible task. How do you verify nationality on a stateless API endpoint? You cannot do it with IP addresses.
IP geofencing only tells you where a machine is located. It does not tell you the passport country of the developer sitting at the keyboard. A U.S. citizen traveling in Europe has a foreign IP, while a foreign national in San Francisco has a U.S. IP.
This limitation explains why Anthropic chose a blanket ban. They could not risk regulatory fines. They shut down the endpoint for everyone.
If you build apps, do not try to build nationality-based access control inside your database. It is a compliance nightmare. Use standard OAuth identity providers that handle KYC checks if your product falls under strict trade controls.
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