AI Developer Tools

JP the Cat

A macOS native app that tracks real-time costs and usage limits for Claude Code and Codex from the menu bar and widgets.

JP the Cat logo

JP the Cat

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What is JP the Cat?

JP the Cat is a macOS native app that displays real-time cost and usage limit information for Claude Code and Codex directly in the menu bar and as a desktop widget, with no account or API keys required.

JP the Cat vs Similar AI Tools

Pricing ModelFree, FreemiumFreeFreeFree
Free Credits
Key Features
  • Real-time dollar cost display for Claude Code & Codex
  • macOS widget in small, medium, and large sizes
  • Dark (Midnight) and light (Sunlit) themes
  • Seven breakable boxes covering OWASP Agentic Top-10 vulnerabilities
  • Three guided simulations for cascading failures, human-agent trust, and rogue agents
  • Network-isolated Docker containers for safe execution
  • Code-to-runtime reasoning across cloud, Git, and Kubernetes
  • Action-gate enforces read-only policy on every API call
  • Sandboxed JavaScript execution for concurrent research
  • Append-only, SHA-256-addressed event history through Jaybase
  • AES-256-GCM encryption for stored node payloads
  • Unified RBAC for ledger, notes, snapshots, and audit reads
ProsN/A
  • Covers full OWASP Agentic Top-10 in a realistic manner
  • Docker isolation prevents accidental damage
  • Read-only by construction prevents accidental writes
  • Evidence-backed verification cross-checks every finding
  • Opinionated and secure accounting CLI with immutable audit trail
  • Designed for AI agent integration with JSON output
ConsN/A
  • Requires Docker and technical setup
  • Not for production use; only for lab environments
  • Requires an LLM API key, incurring token costs
  • Limited to read-only operations, cannot remediate
  • Pre-1.0, limited feature set
  • No native QuickBooks import (agents must normalize data)
Best For
  • Developers using Claude Code or Codex who need to track spending and usage limits
  • Security researchers focusing on AI agent vulnerabilities
  • Developers building MCP-based applications
  • Security engineers
  • DevOps teams
  • Small teams needing secure, auditable accounting with AI agent support
  • Developers integrating automated bookkeeping workflows

How to use JP the Cat?

  1. 1Download the app from jpthecat.com and drag it to Applications.
  2. 2Open the app; it automatically reads local logs from Claude Code and Codex.
  3. 3View your live spending and usage limits in the menu bar pill.
  4. 4Add a desktop widget by right-clicking the desktop, opening Edit Widgets, searching for 'JP the Cat', and dragging a size.
  5. 5Optionally enable the 80% meow alert and configure additional providers in Settings.

JP the Cat Key Features

  • Real-time dollar cost display for Claude Code & Codex
  • macOS widget in small, medium, and large sizes
  • Dark (Midnight) and light (Sunlit) themes
  • 80% usage limit meow alert
  • Works offline with no account or API keys
  • Native Swift, notarized by Apple, no Full Disk Access
  • Per-provider breakdown with usage gauges
  • Configurable 7/14/30/90-day window

JP the Cat Use Cases

  • Monitor AI agent spending in real-time
  • Stay within Claude Code and Codex usage limits
  • Budget for development costs with accurate metrics
  • Track historical spending across multiple time windows

JP the Cat Pricing & Free Credits

JP the Cat currently operates on a Free, Freemium model.

Free Tier

Free Tier

$0

Live menu-bar total with 5-hour and weekly limit percentage, free forever.

Paid Plans

Full License

$12.99

One-time purchase unlocking dashboard, widgets, gauges, and 80% alerts. Includes free updates.

Free Tier

$0

Live menu-bar total with 5-hour and weekly limit percentage, free forever.

Full License

$12.99

One-time purchase unlocking dashboard, widgets, gauges, and 80% alerts. Includes free updates.

What is JP the Cat best for?

  • Developers using Claude Code or Codex who need to track spending and usage limits

JP the Cat FAQ

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