Developer Builds TokenMonitor, a Cyberpunk-Styled App to Track Claude Code Usage
TechPreacher · x · 2026-08-27
Sascha Corti built TokenMonitor, a native macOS menu-bar app designed to track Claude Code subscription limits, session context, and API spend. Featuring a cyberpunk "Neon HUD" interface, the app displays real-time subscription usage percentages, local token counts, context-window fill for active sessions, and month-to-date API costs. The article details the architectural design with four independent data sources, sharing technical implementation insights such as reading OAuth tokens from the Keychain, parsing JSONL logs, and exploring undocumented API endpoints. Notably, the app was built almost entirely using Claude Code itself.
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