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AIUsage.NET is a free, open source Windows system tray application developed by LuigiElleBalotta for tracking usage limits and spending across AI coding tools. Positioned in the developer tools and AI utilities category, the software monitors session and weekly limits, remaining credits, and local spend estimates for a broad set of AI coding subscriptions, including Claude, Codex, Cursor, Copilot, Antigravity, Devin, Grok, OpenCode, OpenRouter, and Z.ai. Rather than requiring users to re-enter account details, the application reads credentials that are already stored on the machine, simplifying setup and keeping the monitoring experience unobtrusive while it runs quietly from the system tray. Technically, AIUsage.NET is a .NET 8 / WPF port of OpenUsage for Windows, bringing that project's usage-tracking concept to the Windows desktop with a native interface. Beyond the tray application itself, the software includes a local command-line tool and a read-only local HTTP API, enabling scripting workflows and allowing other applications to consume the same usage data programmatically. This makes it suitable for developers who want at-a-glance awareness of subscription consumption as well as for those who wish to integrate usage metrics into their own tooling, dashboards, or automation. The current release is version 0.4.1, and the catalog lists one published version to date. The application's purpose centers on giving users visibility into how close they are to the limits of their various AI coding subscriptions and how much they are estimated to be spending locally, consolidating information from multiple providers into a single, continuously accessible Windows tray utility. By combining system tray monitoring, command-line access, and a local API in one open source package, AIUsage.NET serves both casual monitoring needs and more advanced integration scenarios for users of multiple AI-assisted development services.
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