VPOC Migration Pro runs a tiny HTTP server inside Bookmap. It serves the current level state — VPOC, DVPOC, Naked levels, Tested levels — as a CSV file at a local URL. The default address is 127.0.0.1:8001/vpoc_levels.csv — but both the server address and the port are fully configurable in the addon's settings panel. If port 8001 conflicts with something else on your machine, or you want to bind to a different interface, change it there and the addon will start serving from the new URL on the next launch.
Bookmap's Cloud Notes feature is a column type (CLN) that reads external CSV files and renders their contents as price-level annotations on the chart. So the addon publishes, Cloud Notes consumes, and the levels appear automatically without any external software or middleware.
With the default 127.0.0.1 address, the server only listens on localhost — no network traffic leaves your machine. No accounts, no API keys, no cloud sync — despite the name 'Cloud Notes,' nothing about this setup actually involves the cloud.