Langfuse JS/TS

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 instead as it does not use fetch and other Web APIs

Installation

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