LLMWatch

Know exactly which feature is burning your LLM budget

LLMWatch instruments your OpenAI and Anthropic calls to show per-feature, per-endpoint, and per-user cost breakdowns in real time. One-line SDK. No proxy required.

The $2,000 OpenAI invoice problem

It's the 3rd of the month. Your OpenAI bill landed. It's $2,300. Up from $1,100 last month.

Without LLMWatch
❌ "Our OpenAI bill doubled. Why?"
❌ Check billing dashboard → shows total: $2,300
❌ No feature breakdown. No user breakdown. No timeline.
❌ Spend 3 hours adding console.log() everywhere
❌ Discover it was the new AI search feature. 6 days after launch.

With LLMWatch

✅ Real-time: "ai-search: $890 this month (+120%)"

✅ Alert fires day 2: "ai-search exceeded $50/day threshold"

✅ See: average tokens per call spiked from 400 → 1,200

✅ Fix prompt. Cost drops. Invoice back to normal.

Everything you need to stop LLM bill shock

🔍

Per-feature cost breakdown

"The AI search box costs $400/mo. The summarizer costs $12." See it instantly.

🚨

Real-time spend alerts

Get notified the moment any endpoint's daily spend exceeds your threshold — not at invoice time.

🔧

One-line SDK

Wrap your existing OpenAI or Anthropic client. No proxy, no configuration, no infrastructure change.

👤

Per-user attribution

Pass a userId and see which users are burning the most tokens. Essential for usage-based pricing.

📈

Trend detection

Automatically flags when a feature's cost per call increases — catches prompt bloat and token leaks.

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No data retention

LLMWatch logs metadata only — token counts, timestamps, feature labels. Your prompt content never leaves your app.

Two lines to instrument your app

Wrap your existing OpenAI client. Every call is automatically tracked.

import { wrap } from 'llmwatch'  // npm install llmwatch

const openai = wrap(new OpenAI(), {
  apiKey: 'lw_...',
  feature: 'ai-search'  // label this call group
})

// Everything else is unchanged — normal OpenAI SDK
const response = await openai.chat.completions.create({ ... })

Simple pricing

No per-seat, no per-call fees. One flat rate.

$19/mo

Indie developers & small teams · Unlimited features · Unlimited calls

Early access pricing for waitlist members

Stop guessing which feature is over budget

Join the waitlist. First users get 3 months free and influence the roadmap.

Calculate your current LLM costs →