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. Default address is 127.0.0.1:8001/vpoc_levels.csv.
Bookmap's Cloud Notes feature is built to read external CSV files and render their contents as chart annotations with horizontal lines. So the addon publishes, Cloud Notes consumes, and the levels appear automatically without any external software or middleware.
The server only listens on 127.0.0.1 (localhost). No network traffic leaves your machine. No accounts, no API keys, no cloud sync — despite the name 'Cloud Notes' being slightly misleading here.