# Langfuse
[EN] Source: https://mastra.ai/reference/observability/otel-tracing/providers/langfuse

Langfuse is an open-source observability platform designed specifically for LLM applications.

> **Note**: Currently, only AI-related calls will contain detailed telemetry data. Other operations will create traces but with limited information.

## Configuration

To use Langfuse with Mastra, you can configure it using either environment variables or directly in your Mastra configuration.

### Using Environment Variables

Set the following environment variables:

```env
OTEL_EXPORTER_OTLP_ENDPOINT="https://cloud.langfuse.com/api/public/otel/v1/traces" # 🇪🇺 EU data region