LangSmith

LangSmith is LangChain’s platform for debugging, testing, evaluating, and monitoring LLM applications.

Configuration

To use LangSmith with Mastra, you’ll need to configure the following environment variables:

OTEL_EXPORTER_OTLP_ENDPOINT=https://api.smith.langchain.com/v1/traces
OTEL_EXPORTER_OTLP_HEADERS="Authorization=Bearer your_api_key, x-langsmith-project-id=your_project_id"

Implementation

Here’s how to configure Mastra to use LangSmith:

import { Mastra } from "@mastra/core";
 
export const mastra = new Mastra({
  // ... other config
  telemetry: {
    serviceName: "your-service-name",
    enabled: true,
    export: {
      type: "otlp",
    },
  },
});

Dashboard

Access your traces and analytics in the LangSmith dashboard at smith.langchain.com

Braintrust Langfuse