TokLog

htop for your LLM spend — proxy-only.

TokLog is a local-first HTTP proxy for LLM spend visibility and control.

Route OpenAI-, Anthropic-, and Gemini-compatible traffic through a local proxy. TokLog logs usage locally, attributes cost by model/provider/program/tag, and turns raw traffic into actionable waste reports.

No hosted backend. No account. No prompt egress by default.

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Install

pip install toklog
tl proxy setup
tl proxy start --background

After setup, clients that support base URL overrides can route through TokLog with no app-specific SDK integration.

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What it does

• Proxy-based capture — intercepts LLM traffic at the HTTP layer
• Cross-language — works with Python, TypeScript, Go, curl, and anything else that can point at a base URL
• Cross-provider — OpenAI, Anthropic, Gemini
• Local logs — normalized JSONL logs under ~/.toklog/logs/
• Spend reports — model, provider, endpoint, program, and tag breakdowns
• Waste detection — highlights expensive patterns worth fixing first
• Shareable output — terminal and exported reports

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Core commands

tl report

Full spend breakdown — models, processes, context composition, waste detectors.

tl report           # last 7 days
tl report --last 30d

tl gain

Cumulative savings opportunities — shows how much waste each detector has found since install.

tl gain

tl doctor

Health check — verifies config, proxy, env vars, logging, and traffic.

tl doctor

tl share

Generate a self-contained HTML report you can share — no server needed.

tl share             # save to ~/.toklog/reports/
tl share --open      # save and open in browser

tl proxy status

Check if the proxy daemon is running and where it's listening.

tl proxy status

Other commands

tl proxy setup          # interactive setup wizard
tl proxy start --background
tl proxy stop
tl tail                 # live stream of logged calls
tl categories           # list detected call categories
tl pricing              # show model pricing table
tl reset                # clear all logs and config

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Budget Kill Switch

Set a daily spend limit. When the budget is exceeded, the proxy returns HTTP 429 immediately — no upstream request is made.

Enable it

CLI flag (takes precedence over config):

tl proxy start --budget 10.00

Or set it in ~/.toklog/config.json:

{
  "proxy": {
    "budget_usd": 10.00
  }
}

What happens at the limit

Requests get a 429 Too Many Requests response with a JSON error body:

{
  "error": {
    "message": "Daily budget of $10.00 exceeded",
    "type": "budget_exceeded"
  }
}

No tokens are consumed. No upstream contact is made.

Monitoring

tl proxy status   # shows current spend vs budget limit
tl report         # includes budget bar and rejection warnings

Behavior notes

• Resets at midnight local time
• No budget configured = no enforcement (fully backward compatible)
• GET requests (e.g. /v1/models) are never blocked

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License

TBFUL-1.0 — free for non-commercial and small-scale use. Commercial license required above $10k annual LLM spend.