Show HN: Lupen – an itemized, verified receipt for Claude Code and Codex spend

Category: devtools

Tags: cost-monitoring, claude-code, developer-tools

Score: 6.8/10 (Innovation: 6, Technical: 7, Documentation: 7, Utility: 7)

Lupen is a macOS desktop app and CLI that provides itemized, verified cost breakdowns for Claude Code and Codex sessions by parsing local log files. It recomputes spend per turn, step, and sub-agent from raw tokens, flags billing drift, and offers searchable history with resume functionality—all with zero network requests. This fills a clear gap for developers wanting granular visibility into AI coding costs without relying on cloud dashboards.

Target audience: backend devs, ai engineers, devops

Repository: https://github.com/momoraul/Lupen · Swift · MIT · 21 stars

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