v0.2.5 — Zero-Config API Cost Tracking

What is burn0?

One import tracks every API cost in your Node.js stack. LLMs, SaaS, databases, infrastructure — see per-request costs right in your terminal.

npm i @burn0/burn0

import "@burn0/burn0"; // That's it. Costs appear in your terminal.

Highlights

• One import, zero config — Add import "@burn0/burn0" and costs appear instantly
• • 50+ services — OpenAI, Anthropic, Gemini, Stripe, Supabase, SendGrid, Twilio, and more
• • Sub-millisecond overhead — Async event processing, never blocks your requests
• • Feature attribution — track("onboarding", async () => { ... }) to see costs per feature
• • CLI mode — npx burn0 dev -- node app.js for zero-code-change tracking
• • Privacy-first — Local by default, never reads request/response bodies
• • Dashboard — Optional cloud dashboard at burn0.dev/dashboard

What's New in v0.2.5

• Postinstall init wizard for instant setup
• • Cached pricing loaded synchronously before ledger seed
• • Source maps excluded from npm package
• • Dashboard setup moved into Quick Start section
• • Improved TTY detection and clean exit handling

Links

• Website
• • npm
• • Docs
• • Dashboard
    Full Changelog: https://github.com/burn0-dev/burn0/commits/v0.2.5