Mimir is a lightweight, open-source macOS menu bar app that displays real-time usage limits and reset countdowns for AI coding tools, including Claude, Codex, Gemini, and Antigravity. (Free, open-source)
The menu bar icon consolidates status for all configured AI services into a single popover. Each service shows its current quota consumption through color-coded indicators — green for healthy, amber for approaching limits, and red when a quota is spent. Dots grey out when a model’s weekly quota is exhausted, providing an unambiguous signal that a service is temporarily unavailable. Reset countdowns show exactly when each limit refreshes, helping users plan work across services.
Privacy is a core design constraint: Mimir reads only local configuration files and the macOS Keychain for service credentials. No data is transmitted to Mimir’s servers or any intermediary. Claude usage pulls from Claude Code’s OAuth session, Codex reads the ChatGPT usage API with a local fallback, and Antigravity connects to a local language server via Cockpit. The architecture means the app functions without an account and without network calls beyond each service’s own API. The interface supports full light and dark mode and maintains a minimalist monochrome aesthetic that integrates with standard macOS design conventions.
Installation is a drag-and-drop DMG or a single build script for developers who prefer to compile from source using Swift 6.0+.
System requirements: macOS 14 Sonoma or later. App size is small (Swift binary). Available as DMG from GitHub Releases or buildable from source.
Pricing: (Free, open-source — MIT License)
Limitations: Supports a fixed set of four AI coding services; adding other providers requires contributing to the open-source codebase. The app depends on each service’s own API or OAuth session, so changes to those APIs may break individual integrations until an update is released. Limited to 14 GitHub stars and a small contributor base as of June 2026, meaning community support is minimal.
Alternatives: Claude Usage Systray monitors Claude API usage specifically (single-service focus). SpendBar tracks Anthropic and OpenAI API costs with budget alerts. Most AI coding platforms also provide their own usage dashboards in-browser, though these lack the persistent menu bar presence.
Suitable for users who work across multiple AI coding assistants daily and need a quick, private way to monitor quota status without navigating to individual service dashboards.
