langfuse/README.md

![GitHub Banner](https://github.com/langfuse/langfuse-js/assets/2834609/d1613347-445f-4e91-9e84-428fda9c3659)

# Langfuse JS/TS

[![MIT License](https://img.shields.io/badge/License-MIT-red.svg?style=flat-square)](https://opensource.org/licenses/MIT) [![npm package](https://img.shields.io/npm/v/langfuse?style=flat-square)](https://www.npmjs.com/package/langfuse) [![GitHub Repo stars](https://img.shields.io/github/stars/langfuse/langfuse?style=flat-square&logo=GitHub&label=langfuse%2Flangfuse)](https://github.com/langfuse/langfuse) [![Discord](https://img.shields.io/discord/1111061815649124414?style=flat-square&logo=Discord&logoColor=white&label=Discord&color=%23434EE4)](https://discord.gg/7NXusRtqYU) [![YC W23](https://img.shields.io/badge/Y%20Combinator-W23-orange?style=flat-square)](https://www.ycombinator.com/companies/langfuse)

This is the main JS/TS client for Langfuse.

## Documentation

- Docs: https://langfuse.com/docs/sdk/typescript
- Reference: https://js.reference.langfuse.com/modules/langfuse.html

## Environments

**Supported**

- Node.js >=18
- Web
- Edge: Vercel, Cloudflare Workers, etc.

**Using Node.js <18?** Use [`langfuse-node`](https://www.npmjs.com/package/langfuse-node) instead as it does not use `fetch` and other Web APIs

## Installation

```bash
npm i langfuse
# or
yarn add langfuse
# or
pnpm i langfuse
```