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ancha serve runs an Ancha server until you stop it with Ctrl-C or SIGTERM. ancha run and ancha doctor start their own server when none is configured, so you only need serve to share one server between commands: ancha env, ancha sandbox, ancha mcp and ancha ui --server-url.

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Example

Output
In another terminal, point commands at it. http://127.0.0.1:4400 is already the default for server commands:
--port 0 picks a free port. The server binds 127.0.0.1 by default.

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Running it in Docker

Inside a container, bind all interfaces and advertise the host-side address, so the URLs it hands out work from your machine:
--public-url must be a loopback HTTP origin without credentials. It changes the URLs the server advertises, not the bind address. Environments and sandboxes live in the server’s memory and end when it stops.