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AgentMeter

Track API spend with intent-level attribution. Shows where your tokens go by project and purpose. Invoke with /meter for spend summary.

personAuthor: oztenbothubclawhub
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/meter — API Spend Tracker

When the user invokes /meter, run a SINGLE bash command that handles everything: setup check, backfill, and summary. One prompt, one approval.

Execution

Run this single bash command:

bash "$(for d in "$HOME/.claude/skills/agent-meter" "$HOME/.claude/skills/meter" ".claude/skills/meter" ".claude/skills/agent-meter"; do [ -f "$d/meter.sh" ] && echo "$d/meter.sh" && break; done)"

If meter.sh is not found, tell the user the script wasn't found and suggest reinstalling.

Format the output as a clean markdown summary for the user.

If the user passes arguments like /meter --by model or /meter --last 7d, append them: bash .../meter.sh --last 7d

Setup

Install from ClawHub into your project:

clawhub install agent-meter --dir .claude/skills

Then run /meter — it handles everything automatically:

  • Copies the session-end hook to .claude/hooks/
  • Creates or updates .claude/settings.json with the Stop hook
  • Backfills any existing Claude Code sessions
  • Shows your spend summary

That's it. Future sessions are tracked automatically via the Stop hook.

Dashboard sync (optional)

To sync spend data to the hosted dashboard at dashboard.agentmeter.io:

bash .claude/skills/agent-meter/meter-sync.sh --setup

The setup wizard will prompt for your API key and agent name. Get a key from the dashboard's Machines page. After setup, sync anytime with:

bash .claude/skills/agent-meter/meter-sync.sh

What the scripts do

  • meter.sh — Single entry point for /meter. Checks hook installation, backfills if needed, shows spend summary. All in one script, one permission prompt.

  • meter-session-end.sh (Stop hook): Parses the current session's transcript for per-message token usage. Detects model (opus/sonnet/haiku), calculates cost with model-specific pricing including cache tier pricing, writes a single session_summary record. Deduplicates by session_id — safe across session pause/resume. No network calls, no secrets access, jq dependency only.

  • meter-parse-claude-sessions.sh (backfill): Scans all Claude Code transcripts in ~/.claude/projects/*/*.jsonl. Extracts the same usage data as the hook. Deduplicates against existing records by session_id. Safe to re-run — only processes new sessions. No network calls, no secrets access, jq dependency only.

Query Examples

SPEND="$HOME/.agent-meter/spend.jsonl"

# Spend by project
jq -s 'group_by(.project) | map({project: .[0].project, cost: (map(.cost_usd) | add), sessions: length}) | sort_by(-.cost)' "$SPEND"

# Spend by model
jq -s 'group_by(.model) | map({model: .[0].model, cost: (map(.cost_usd) | add), sessions: length}) | sort_by(-.cost)' "$SPEND"

# Today's spend
jq -s "[.[] | select(.ts | startswith(\"$(date -u +%Y-%m-%d)\"))] | map(.cost_usd) | add" "$SPEND"

# Top 10 most expensive sessions
jq -s 'sort_by(-.cost_usd) | .[:10] | .[] | "\(.cost_usd | . * 100 | round / 100) \(.project) \(.total_calls) calls \(.ts | split("T")[0])"' "$SPEND" -r

Schema

All records are session_summary type in ~/.agent-meter/spend.jsonl.

| Field | Required | Description | |-------|----------|-------------| | type | yes | Always session_summary | | ts | yes | ISO 8601 timestamp (session start) | | api | yes | api.anthropic.com | | model | yes | Model identifier (e.g. claude-opus-4-6) | | session_id | yes | Claude Code session UUID | | project | yes | Project directory name | | total_calls | yes | Number of assistant messages | | tokens_in | yes | Input tokens (non-cached) | | tokens_out | yes | Output tokens | | cache_creation | yes | Cache creation input tokens | | cache_read | yes | Cache read input tokens | | cost_usd | yes | Estimated cost (model-aware pricing) | | source | yes | hook or session_parse | | purpose | no | Human-readable intent (manual tag) | | intent | no | Machine tags (manual) |

Cost Calculation

Per-1M-token pricing:

| Model | Input | Output | Cache Create | Cache Read | |-------|-------|--------|-------------|------------| | Opus | $15 | $75 | $18.75 (1.25x) | $1.50 (0.1x) | | Sonnet | $3 | $15 | $3.75 (1.25x) | $0.30 (0.1x) | | Haiku | $0.25 | $1.25 | $0.3125 (1.25x) | $0.025 (0.1x) |