List the servers your app may talk to, in one line of Python. Any other connection Python makes is refused before it opens, whether it comes from your own code, a dependency or code an AI wrote. Free and open source, with no proxy to run.

A zero-dependency Python library that restricts outbound network access at runtime. Declare an allow list, and every socket call outside it is blocked — supply chain defense, AI agent guardrails, and test isolation in a single line of code.