SDK

SDK overview

The LLM Cost Tracker SDK is a lightweight TypeScript package that wraps your existing Anthropic or OpenAI calls and logs cost data to your dashboard — without changing your response handling or adding latency to your requests.

Installation

npm install @llmcosttracker/sdk

Two functions

The SDK exports two functions depending on how you call your LLM:

• trackedCall() — for standard (non-streaming) calls
• trackedStream() — for streaming calls

Design principles

• Non-blocking — logging happens asynchronously and never throws. A logging failure will never surface to your users or break your app.
• Zero response change — both functions return the exact same value as the underlying LLM call. Drop-in replacement.
• No framework required — works with any Node.js or TypeScript project. No LangChain, no special setup.
• Your data — events are posted to your own LLM Cost Tracker project endpoint. No third-party data sharing.

Next: trackedCall() reference →