OCI Proxy Manager
Lives in the tray watching a cloud instance’s free-tier allowance, keeps the running total honest, rings at 80% and 95%, and resets itself across month boundaries.
Python + Tkinter / PyInstaller / Windows tray resident
This one needs a backend or a desktop environment, so it cannot run inside a web page.
How it works
The hard part was never the UI, it was making the number honest. The provider meters egress by calendar month; the local process only knows what it has moved since it started — and in between sit restarts, month boundaries, and the traffic the host generates on its own. The fix is a baseline snapshot plus monthly archiving, auto-zeroing across month boundaries, and periodic SSH calibration against the host’s real counters. An earlier build missed the host’s own egress entirely and drifted 14% off the bill.