Claude Max Usage Calculator

Track your Claude Max subscription usage based on the reverse-engineered credits system from she-llac.com/claude-limits.

When to use

When the user asks about Claude usage, credits, subscription consumption, rate limits, or wants to know how much budget is left.

Setup (first time)

Ask the user for:

1. Weekly reset time — visible on claude.ai Settings > Usage (e.g. "Resets Mon 2:00 PM")
2. Plan — pro ($20), 5x ($100), or 20x ($200). Default: 5x

Save it so they never have to repeat:

python3 {SKILL_DIR}/scripts/claude-usage.py "2026-02-09 14:00" --plan 5x --save

Commands

# Weekly overview (uses saved config after first --save)
python3 {SKILL_DIR}/scripts/claude-usage.py

# Override plan or timezone
python3 {SKILL_DIR}/scripts/claude-usage.py --plan 20x --tz "America/New_York"

# Top N sessions only
python3 {SKILL_DIR}/scripts/claude-usage.py --top 5

# Single session detail (substring match on key or id)
python3 {SKILL_DIR}/scripts/claude-usage.py --session "main"
python3 {SKILL_DIR}/scripts/claude-usage.py --session "9aadee"

# JSON output
python3 {SKILL_DIR}/scripts/claude-usage.py --json

What it shows

Weekly overview

• Total credits used vs weekly budget (with progress bar)
• 5-hour sliding window — warns if approaching the per-5h rate limit
• All sessions ranked by credits consumed
• Model breakdown (Opus/Sonnet/Haiku/non-Claude)

Single session detail (--session)

• Credits consumed and % of weekly budget
• % of total usage (how much of your spending this session accounts for)
• Token breakdown (input/output/cache)
• Per-model detail

Credits formula

credits = (input_tokens + cache_write_tokens) × input_rate + output_tokens × output_rate

Cache reads are free. Non-Claude models (Gemini, Codex, etc.) don't consume Claude credits.

Plan budgets

Requirements

• Python 3.9+
• OpenClaw with session JSONL files (auto-detected at ~/.openclaw/agents/main/sessions/)