A fast, zero-dependency CLI cost calculator and statusline provider for Claude Code — single binary, no runtime needed.

Parses JSONL logs from ~/.claude/projects/, deduplicates streaming responses, and breaks down spending by model, day, and project — with accurate per-model pricing including separate cache write tiers.

Table of Contents

• Installation
• Usage
• Claude Code Statusline
• Flags
• How It Works
• Preserving Log History

Installation

Homebrew (macOS / Linux)

brew install backstabslash/tap/goccc

Alternatives

Go install (requires Go):

go install github.com/backstabslash/goccc@latest

From source:

git clone https://github.com/backstabslash/goccc.git && cd goccc
go build -o goccc .     # macOS / Linux
go build -o goccc.exe . # Windows

Pre-built binaries are available on the releases page for macOS, Linux, and Windows (amd64 / arm64).

Usage

goccc                              # Summary of all-time usage
goccc -days 7 -all                 # Last 7 days with daily and project breakdowns
goccc -daily                       # Daily breakdown only
goccc -projects                    # Project breakdown only
goccc -project webapp -daily       # Filter by project name (substring match)
goccc -days 1                      # Today's usage
goccc -projects -top 5             # Top 5 most expensive projects
goccc -days 30 -all -json          # JSON output for scripting
goccc -json | jq '.summary.total_cost'  # Pipe to jq for custom analysis

Claude Code Statusline

goccc can serve as a Claude Code statusline provider — a live cost dashboard right in your terminal prompt.

💸 $1.23 session · 💰 $5.67 today · 💭 45% ctx · 🔌 2 MCPs (confluence, jira) · 🤖 Opus 4.6

• 💸 Session cost — parsed from the current session's JSONL files using goccc's pricing table
• 💰 Today's total — aggregated across all sessions today (shown only when higher than session cost)
• 💭 Context % — context window usage percentage
• 🔌 MCPs — active MCP servers (from settings, marketplace plugins, and project config; respects per-project disables)
• 🤖 Model — current model

Cost and context values are color-coded yellow → red as they increase.

Setup

Add to ~/.claude/settings.json:

Using Homebrew (recommended — fast, no runtime needed):

{
  "statusLine": {
    "type": "command",
    "command": "goccc -statusline"
  }
}

Using Go (requires Go installed; binary is cached after first download):

{
  "statusLine": {
    "type": "command",
    "command": "go run github.com/backstabslash/goccc@latest -statusline"
  }
}

To hide the MCP indicator, add -no-mcp.

Flags

Flag	Short	Default	Description
-days	-d	0	Only show the last N calendar days (0 = all time)
-project	-p		Filter by project name (substring, case-insensitive)
-daily		false	Show daily breakdown
-projects		false	Show per-project breakdown
-all		false	Show all breakdowns (daily + projects)
-top	-n	0	Max entries in breakdowns (0 = all)
-json		false	Output as JSON
-no-color		false	Disable colored output (also respects NO_COLOR env)
-base-dir		~/.claude	Base directory for Claude Code data
-statusline		false	Statusline mode for Claude Code (reads session JSON from stdin)
-no-mcp		false	Hide MCP servers from statusline output
-version	-V		Print version and exit

How It Works

Claude Code stores conversation logs as JSONL files under ~/.claude/projects/<project-slug>/. Each API call produces one or more log entries — streaming responses generate duplicates with the same requestId.

goccc:

1. Walks .jsonl files under the projects directory, skipping non-matching project directories and files older than the date range (by mtime)
2. Pre-filters lines with a byte scan before JSON parsing — only "type":"assistant" entries carry billing data (tolerates both compact and spaced JSON formatting)
3. Deduplicates streaming entries by requestId (last entry wins)
4. Calculates costs using Anthropic's published pricing, including separate rates for 5-minute and 1-hour cache writes
5. Aggregates by model, date (local timezone), and project

Preserving Log History

Claude Code periodically deletes old log files. To keep more history for cost tracking, increase the cleanup period in ~/.claude/settings.json:

{
  "cleanupPeriodDays": 365
}

The default is 30 days. Set it higher to retain more data for goccc to analyze.