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AI Agents · Concept

Observability

LangSmith Observability records an agent's execution as traces made of runs. Enable tracing to debug, evaluate, and monitor agents, while selective tracing and anonymizers control what is recorded.

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Syntax

export LANGSMITH_AGENT_ID="<your-agent-id>"
export LANGSMITH_AGENT_ENVIRONMENT="local"
export LANGSMITH_TRACING=true
export LANGSMITH_API_KEY="<your-api-key>"

In-depth API docs are only for subscribers: parameters, examples, common mistakes and interview practice.

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  • LangSmith
  • LangChainTracer
  • tracing_context
  • anonymizers
  • tracer_session_name
  • agent addressing

Source: LangSmith Observability. Checked 2026-11-03.