Claude Code Usage Monitor for VS Code

Monitor your Claude Code usage and costs directly in your VS Code status bar.

Features

• Real-time cost tracking: Shows today's Claude Code usage cost in the status bar
• Automatic updates: Refreshes every 30 seconds to show current usage
• Detailed breakdown: Click the status bar item to see a table with the last 7 days of usage data
• Zero configuration: Works out of the box with your existing Claude Code setup

Usage

Once installed, the extension will automatically:

1. Display today's Claude Code usage cost in the status bar (e.g., "Today: $2.45")
2. Update the display every 30 seconds
3. Show a detailed table with the last 7 days of usage when you click on the status bar item

Commands

• Claude Code Usage: Refresh Usage Data - Manually refresh the usage data
• Claude Code Usage: Show Usage Details - Show detailed usage breakdown

Requirements

• VS Code 1.74.0 or higher (also works with Cursor)
• Claude Code must be installed and have generated usage data in ~/.claude/projects/

Installation

From Source

1. Clone this repository
2. Run npm install
3. Run npm run compile
4. Run npm run package to create a VSIX file
5. Install the VSIX file in VS Code

Development

# Install dependencies
npm install

# Compile TypeScript
npm run compile

# Watch for changes
npm run watch

# Package extension
npm run package

How it Works

The extension reads Claude Code usage data from the local JSONL files stored in ~/.claude/projects/. It aggregates the data to show:

• Today's total cost in the status bar
• Detailed table view showing the last 7 days of usage data
• Daily breakdown of token usage (input, output, cache creation, cache read)
• Cost per day and total costs
• Real-time updates as you use Claude Code

Pricing

The extension calculates costs based on Claude Opus pricing (as of June 2025):

• Input tokens: $15.00 per million tokens
• Output tokens: $75.00 per million tokens
• Cache creation tokens: $18.75 per million tokens
• Cache read tokens: $1.50 per million tokens

Note: The extension supports both legacy and current Claude Code data formats for compatibility.

Privacy

This extension only reads local Claude Code usage data from your machine. No data is sent to external services.

Changelog

v0.1.2 (Latest)

• Fixed support for new Claude Code data format (post June 3, 2025)
• Updated cache pricing to correct values ($18.75 for creation, $1.50 for read)
• Now automatically calculates costs when costUSD field is not present

v0.1.1

• Initial release
• Basic cost monitoring and status bar display
• 7-day usage history table

License

MIT