Session Cost

Analyze OpenClaw session logs to report token usage, costs, and performance metrics grouped by agent and model. Use when the user asks about API spending, to...

Security Scan

The skill's code and instructions match its stated purpose: it reads local OpenClaw session .jsonl files to compute token/cost summaries, requires only node, and does not request unrelated credentials or network access.

Purpose & Capability

Name/description state: analyze OpenClaw session logs for token/cost metrics. The shipped script reads ~/.openclaw/agents/*/sessions/*.jsonl (or a user-specified path) and computes token/cost summaries. Required binary 'node' is appropriate and proportional.

Instruction Scope

SKILL.md and the script explicitly instruct the agent to read session .jsonl files and produce summaries. The behavior is narrowly scoped to reading session logs; options allow filtering by agent, provider, or directory. The skill does read arbitrary .jsonl files in any path you pass with --path, which is expected for this utility but means you should not point it at directories containing unrelated sensitive data.

Install Mechanism

There is no install spec; this is instruction-plus-script and requires an existing node binary. No remote downloads, package installs, or archive extraction are present.

Credentials

The skill declares no environment variables or credentials and the code does not access global env secrets. It only reads filesystem paths (defaulting to the user's home .openclaw agents folder). No requests for unrelated tokens/keys detected.

Persistence & Privilege

always is false and the skill does not modify other skills, agent configuration, or system-wide settings. The script is read-only (reads files) and does not persist privileged configuration.

Assessment

This skill appears to do what it says: it reads OpenClaw session .jsonl logs (by default under ~/.openclaw/agents/) and computes token/cost summaries. It requires node to run. Before installing or running: (1) confirm you trust the machine-local .jsonl files being read (don't point --path at directories with unrelated sensitive data), (2) review the script if you want to be sure it won't be modified to exfiltrate data, and (3) run it locally (not on a multi-tenant system) if logs contain sensitive information. Note: the agent can invoke the skill autonomously (normal default), so if you enable autonomous behaviors be aware it may run the script without prompting.

Analyze OpenClaw session logs for token usage, costs, and performance metrics grouped by agent and model.

By default, scans all agents in ~/.openclaw/agents/. Each agent's sessions are read from ~/.openclaw/agents/<name>/sessions/.

Quick Start

# Summary across all agents
node /home/claw/.openclaw/workspace/skills/session-cost/scripts/session-cost.js

# Show all session details
node /home/claw/.openclaw/workspace/skills/session-cost/scripts/session-cost.js --details

# Show details for a specific session (searches across all agents)
node /home/claw/.openclaw/workspace/skills/session-cost/scripts/session-cost.js --details abc123

Options

• --path <dir> — Directory to scan for .jsonl files (overrides agent auto-discovery)
• --agent <name> — Filter by agent name (e.g., main, codegen)
• --offset <time> — Only include sessions from the last N units (30m, 2h, 7d)
• --provider <name> — Filter by model provider (anthropic, openai, ollama, etc.)
• --details [session-id] — Show per-session details. Optionally pass a session ID to show just that session (searches across all agents for <id>.jsonl)
• --table — Show details in compact table format (use with --details)
• --format <type> — Output format: text (default), json, or discord
• --json — Shorthand for --format json (backwards compat)
• --help, -h — Show help message

Examples

# Last 24 hours summary
node /home/claw/.openclaw/workspace/skills/session-cost/scripts/session-cost.js --offset 24h

# Only the main agent
node /home/claw/.openclaw/workspace/skills/session-cost/scripts/session-cost.js --agent main

# Last 7 days, JSON output
node /home/claw/.openclaw/workspace/skills/session-cost/scripts/session-cost.js --offset 7d --json

# Discord-friendly format (for bots/chat)
node /home/claw/.openclaw/workspace/skills/session-cost/scripts/session-cost.js --format discord

# Discord format with filters
node /home/claw/.openclaw/workspace/skills/session-cost/scripts/session-cost.js --format discord --offset 24h --provider anthropic

# Filter by provider
node /home/claw/.openclaw/workspace/skills/session-cost/scripts/session-cost.js --provider anthropic

# All sessions in compact table format
node /home/claw/.openclaw/workspace/skills/session-cost/scripts/session-cost.js --details --table

# Custom path with details (overrides agent discovery, scans exact directory)
node /home/claw/.openclaw/workspace/skills/session-cost/scripts/session-cost.js --path /other/dir --details

# Single session detail (found automatically across agents)
node /home/claw/.openclaw/workspace/skills/session-cost/scripts/session-cost.js --details 9df7a399-8254-411b-a875-e7337df73d29

# Anthropic sessions from last 24h in table format
node /home/claw/.openclaw/workspace/skills/session-cost/scripts/session-cost.js --provider anthropic --offset 24h --details --table

Output Format

Text Summary (Default)

Results are grouped by agent, then by model within each agent. A grand total section shows per-agent subtotals and a combined total.

Found 52 .jsonl files across 2 agents, 52 matched

====================================================================================================
SUMMARY BY AGENT
====================================================================================================

Agent: main

  anthropic/claude-sonnet-4-5-20250929
  --------------------------------------------------------------------------------
    Sessions: 30
    Tokens:   1,234,567 (input: 900,000, output: 334,567)
    Cache:    read: 500,000 tokens, write: 200,000 tokens
    Cost:     $12.3456
      Input:       $5.4000
      Output:      $5.0185
      Cache read:  $1.5000  (included in total, discounted rate)
      Cache write: $0.4271  (included in total)

  anthropic/claude-opus-4-6
  --------------------------------------------------------------------------------
    Sessions: 5
    Tokens:   250,000 (input: 180,000, output: 70,000)
    ...

Agent: codegen

  anthropic/claude-sonnet-4-5-20250929
  --------------------------------------------------------------------------------
    Sessions: 17
    ...

====================================================================================================
GRAND TOTAL
====================================================================================================
  main                 — 35 sessions, $15.8200
  codegen              — 17 sessions, $8.5600

All agents (2)
--------------------------------------------------------------------------------
  Sessions: 52
  Tokens:   ...
  Cost:     $24.3800
  ...

When only a single agent is present, the grand total shows "All models (N)" instead.

Text Details (--details)

Shows per-session breakdown (session ID, agent, model, duration, timestamps, tokens, cache, cost) followed by the agent/model summary.

Table Format (--details --table)

Compact table view. When multiple agents are present, an Agent column is included.

SESSION DETAILS
============================================================================================================================================
Agent          Model                              Duration    Tokens        Cache               Cost        Session
────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
main           anthropic/claude-sonnet-4.5        45 min      128.5K        15.2K / 8.1K        $0.3245     abc123def456
codegen        anthropic/claude-sonnet-4.5        12 min      45.3K         2.1K / 1.5K         $0.8921     xyz789abc012

With a single agent, the Agent column is omitted and the table matches the previous format.

JSON (--format json)

Results are nested by agent. Each agent contains its model summaries and an agent-level totals object. A top-level grandTotal aggregates across all agents.

{
  "agents": {
    "main": {
      "models": {
        "anthropic/claude-sonnet-4-5-20250929": {
          "sessions": 30,
          "tokens": { "input": 900000, "output": 334567, "total": 1234567 },
          "cache": { "read": 500000, "write": 200000 },
          "cost": { "total": 12.3456, "input": 5.4, "output": 5.0185, "cacheRead": 1.5, "cacheWrite": 0.4271 }
        }
      },
      "totals": {
        "sessions": 35,
        "tokens": { "input": 1080000, "output": 404567, "total": 1484567 },
        "cache": { "read": 600000, "write": 250000 },
        "cost": { "total": 15.82, ... }
      }
    },
    "codegen": {
      "models": { ... },
      "totals": { ... }
    }
  },
  "grandTotal": {
    "sessions": 52,
    "tokens": { "input": 1500000, "output": 600000, "total": 2100000 },
    "cache": { "read": 800000, "write": 350000 },
    "cost": { "total": 24.38, ... }
  }
}

Discord (--format discord)

Optimized for chat platforms (Discord, Slack, etc.) - concise, markdown-friendly, no tables:

💰 **Usage Summary**
(last 24h)

**Total Cost:** $24.38
**Total Tokens:** 2.1M
**Sessions:** 52

**By Agent:**
• main: $15.82 (35 sessions)
• codegen: $8.56 (17 sessions)

**By Provider:**
• anthropic: $22.50 (1.9M tokens)
• openai: $1.88 (200K tokens)

**Top Models:**
• anthropic/claude-sonnet-4.5: $18.20 (1.5M tokens)
• anthropic/claude-opus-4: $4.30 (400K tokens)
• openai/gpt-4o: $1.88 (200K tokens)

The "By Agent" section is shown only when multiple agents are present.

Output Fields

• Agent — Agent name (derived from directory under ~/.openclaw/agents/)
• Sessions — Number of session files analyzed
• Tokens — Total, input, and output token counts
• Cache — Cache read and write token counts
• Cost — Total cost broken down by input, output, cache read, and cache write
• Duration — Session duration in minutes (details mode)
• Timestamps — First and last activity timestamps (details mode)

Notes

• When --path is provided, it overrides agent auto-discovery and scans exactly that directory. The agent name is inferred from the path (e.g., .../agents/main/sessions → "main").
• --agent and --provider filters can be combined (e.g., --agent main --provider anthropic).
• Single session lookup (--details <id>) searches across all discovered agents to find the session file.