LangChain for Node.js

Import name: Sentry.langChainIntegration

This integration is enabled by default when tracing is enabled. If you'd like to modify your default integrations, read this.

The langChainIntegration adds instrumentation for langchain to capture agent tracing gen_ai spans, recording model, token usage, latency, and (when enabled) inputs and outputs.

Sentry.init({
  dsn: "___PUBLIC_DSN___",
  // Tracing must be enabled for agent tracing to work
  tracesSampleRate: 1.0,
  integrations: [Sentry.langChainIntegration()],
});

Sentry.init({
  dsn: "___PUBLIC_DSN___",
  // Tracing must be enabled for agent tracing to work
  tracesSampleRate: 1.0,
  integrations: [Sentry.langChainIntegration()],
});

Supported Operations

By default, tracing support is added to the following LangChain operations:

• Chat model invocations - Captures spans for chat model calls
• LLM invocations - Captures spans for LLM pipeline executions
• Chain executions - Captures spans for chain invocations
• Tool executions - Captures spans for tool calls

The integration automatically instruments the invoke(), stream(), and batch() runnable methods, across the following LangChain provider packages:

• @langchain/anthropic
• @langchain/openai
• @langchain/google-genai
• @langchain/mistralai
• @langchain/google-vertexai
• @langchain/groq

Embeddings

The integration captures gen_ai.embeddings spans for embedQuery() and embedDocuments() calls from these provider packages:

• @langchain/openai
• @langchain/google-genai
• @langchain/mistralai
• @langchain/google-vertexai

Supported Versions

• langchain: >=0.1.0 <2.0.0

Automatic embeddings instrumentation supports these package versions:

For @langchain/google-vertexai, the version requirement applies to its @langchain/google-common dependency, which implements the embedding methods.

Options

recordInputs

Type: boolean (optional)

Records inputs to LangChain operations (such as prompts and messages).

Defaults to true if dataCollection.genAI.inputs is true, which is the default.

recordOutputs

Type: boolean (optional)

Records outputs from LangChain operations (such as generated text and responses).

Defaults to true if dataCollection.genAI.outputs is true, which is the default.

Sentry.init({
  dsn: "___PUBLIC_DSN___",
  tracesSampleRate: 1.0,
  integrations: [
    Sentry.langChainIntegration({
      recordInputs: false,
      recordOutputs: false,
    }),
  ],
});

Sentry.init({
  dsn: "___PUBLIC_DSN___",
  tracesSampleRate: 1.0,
  integrations: [
    Sentry.langChainIntegration({
      recordInputs: false,
      recordOutputs: false,
    }),
  ],
});