Claude Monitor

Claude Monitor

A monitoring and visualization tool for Claude Code sessions. Track token usage, costs, tool calls, and session activity through a real-time web dashboard.

Claude Monitor installs as a Claude Code hook, capturing every session, message, and tool call into a local SQLite database. A built-in web UI provides dashboards, analytics, and live activity monitoring.

Claude Monitor Demo

Features

  • Real-time monitoring – Live WebSocket-powered view of active Claude Code sessions
  • Session tracking – Automatic capture via Claude Code hooks
  • Historical import – Bulk import existing session logs
  • Cost tracking – Per-session cost estimation with configurable model pricing
  • Token analytics – Input, output, cache read/write breakdowns with efficiency metrics
  • Tool usage stats – Track tool frequency, success rates, and error patterns
  • Error analysis – Error trends, failure rates by tool, common error patterns
  • Prompt patterns – Classify prompts into categories (bug fix, feature, refactor, etc.)
  • File heatmap – See which files are most read, written, and edited per project
  • Session timeline – Visual timeline of messages, tool calls, and agent spawns
  • Git integration – Link commits to sessions, sync via CLI or UI
  • Cost budgets – Set daily/weekly/monthly budgets with alerts
  • Session notes & tags – Annotate sessions for future reference
  • Project breakdown – Per-project session and cost summaries
  • Full-text search – Search across all message content (SQLite FTS5)
  • Export – Download sessions as JSON, CSV, or HTML reports
  • Subagent tracking – Monitor spawned agents, types, and durations

Quick Start 

# Build from source
make build

# Install hooks and initialize the database
claude-monitor install

# Import existing Claude Code session logs
claude-monitor import

# Start the web UI
claude-monitor serve

# Visit http://localhost:3000

Or download a pre-built binary from GitHub Releases.

Documentation