Token-Tap

Token-Tap is a local spend meter for AI coding tools.

It watches or imports Codex, GitHub Copilot, VS Code, OpenAI-style, Anthropic-style, CSV, and generic text logs; estimates token usage and cost; stores summarized history in SQLite; exports reports; evaluates simple alerts; and can publish live values to Windows Performance Counters.

The privacy default is intentionally conservative: Token-Tap stores metrics, hashes, and short redacted excerpts, not full prompts or responses.

Release 1.000

Release 1.000 is the first public standalone release:

• token-tap init
• token-tap detect
• token-tap watch
• token-tap import log|folder|csv
• SQLite schema for sessions, events, aggregates, models, watched sources, cleanup, anomalies, and alerts
• configurable model pricing
• OpenAI JSON, Anthropic JSON, Codex/Copilot/generic text, and CSV parsers
• cost reporting for today, week, month, and rolling day ranges
• CSV and XLSX export
• retention cleanup with detail-to-aggregate rollups
• Windows Performance Counter install/list/test/publish hooks
• alert rule evaluation and alert history
• optional SMTP alert sender that reads the password from an environment variable
• wrapper mode: token-tap run --agent codex -- <command>
• xUnit test coverage for core, parser, storage, export, alert, counter, and CLI paths

Windows Performance Monitor

Token-Tap can publish live values into Windows Performance Counters so PerfMon, PowerShell, and monitoring tools can watch AI spend and token burn without reading the SQLite history database.

Example counters:

Get-Counter '\TokenTap\Estimated Daily Cost Cents'
Get-Counter '\TokenTap\Total Tokens Today'
Get-Counter '\TokenTap Agent(codex)\Estimated Daily Cost Cents'

Counter installation requires an elevated Windows shell:

token-tap counters install
token-tap counters test
token-tap counters list

Requirements

• .NET 8 SDK or newer
• Windows for Performance Counter publishing
• Elevated shell for token-tap counters install and token-tap counters uninstall

Core parsing, importing, reporting, SQLite storage, CSV/XLSX export, and tests do not require admin rights.

Quick Start

Install from NuGet.org:

dotnet tool install --global token-tap
token-tap --help
token-tap init
token-tap detect
token-tap watch --once
token-tap today

Update:

dotnet tool update --global token-tap

Uninstall:

dotnet tool uninstall --global token-tap

Build from source:

dotnet build TokenTap.sln
dotnet test TokenTap.sln
dotnet run --project src/TokenTap.Cli -- init
dotnet run --project src/TokenTap.Cli -- detect
dotnet run --project src/TokenTap.Cli -- import log .\sample.log --agent codex --model gpt-5.4
dotnet run --project src/TokenTap.Cli -- today
dotnet run --project src/TokenTap.Cli -- export --today --format xlsx --out token-spend.xlsx

After publishing, the binary command name is expected to be token-tap.

token-tap init
token-tap watch --once
token-tap report --week

Configuration

Default config:

%USERPROFILE%\.token-tap\token-tap.json

Default database:

%USERPROFILE%\.token-tap\token-tap.db

Initialize somewhere explicit:

token-tap init --config .\.token-tap\token-tap.json --database .\.token-tap\token-tap.db

See docs/CONFIGURATION.md.

Common Commands

token-tap init
token-tap detect --save
token-tap watch-add "%APPDATA%\Code - Insiders\logs"
token-tap watch --publish-counters
token-tap import folder .\logs
token-tap import csv .\usage.csv
token-tap today
token-tap report --month
token-tap top --by cost --today
token-tap export --week --format csv --out token-spend.csv
token-tap cleanup --dry-run
token-tap cleanup --vacuum
token-tap db size
token-tap retention set events 14d
token-tap counters list
token-tap alerts test

See docs/COMMANDS.md.

Privacy

By default Token-Tap stores:

• timestamps
• agent/source/model
• token counts
• estimated cost
• confidence level
• hashes
• short redacted excerpts

By default Token-Tap does not store:

• full prompts
• full responses
• raw logs
• source code contents
• private chat history
• SMTP passwords

See docs/PRIVACY.md.

Repository Layout

src/
  TokenTap.Cli/       command routing and user workflows
  TokenTap.Core/      config, privacy, costing, common models
  TokenTap.Parsers/   parser plugins and CSV import
  TokenTap.Storage/   SQLite schema, queries, cleanup
  TokenTap.Export/    CSV and XLSX reports
  TokenTap.Alerts/    alert rules, console and SMTP notification
  TokenTap.Counters/  Windows Performance Counter adapter
tests/
  TokenTap.Tests/     xUnit tests
docs/
  *.md                architecture, config, commands, privacy, development

Development

dotnet restore TokenTap.sln
dotnet build TokenTap.sln
dotnet test TokenTap.sln

See docs/DEVELOPMENT.md and docs/ARCHITECTURE.md.

Release

Token-Tap is ready for public GitHub CI. The included workflow builds and tests on Windows and Ubuntu using .NET 8.

See docs/RELEASE.md.

GitHub Images

The checked-in logo is docs/assets/token-tap-logo.png. A copy is also stored at .github/social-preview.png for use as the repository Social preview image in GitHub Settings.

License

MIT. See LICENSE.