This is the core package of the Langfuse JS SDK containing the public API client, logger, utilities, and more.
| Package | NPM | Description | Environments |
|---|---|---|---|
| @langfuse/client |  |
Langfuse API client for universal JavaScript environments | Universal JS |
| @langfuse/tracing |  |
Langfuse instrumentation methods based on OpenTelemetry | Node.js 20+ |
| @langfuse/otel |  |
Langfuse OpenTelemetry export helpers | Node.js 20+ |
| @langfuse/openai |  |
Langfuse integration for OpenAI SDK | Universal JS |
| @langfuse/langchain |  |
Langfuse integration for LangChain | Universal JS |