View server logs for a trace

When viewing a trace that was generated by a run in LangSmith, you can access the associated server logs directly from the trace view.

Viewing server logs for a trace only works with the Cloud SaaS and fully self-hosted deployment options.

Access server logs from trace view

In the trace view, use the See Logs button in the top right corner, next to the Run in Studio button. Clicking this button will take you to the server logs view for the associated deployment in LangSmith.

Server logs view

The server logs view displays logs from both:

Agent Server’s own operational logs - Internal server operations, API calls, and system events
User application logs - Logs written in your graph with:
- Python: Use the logging or structlog libraries
- JavaScript: Use the re-exported Winston logger from @langchain/langgraph-sdk/logging:

import { getLogger } from "@langchain/langgraph-sdk/logging";

const logger = getLogger();
logger.info("Your log message");

Filtering logs by trace ID

When you navigate from the trace view, the Filters box will automatically pre-fill with the Trace ID from the trace you just viewed. This allows you to quickly filter the logs to see only those related to your specific trace execution.

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Access server logs from trace view

Server logs view

Filtering logs by trace ID

​Access server logs from trace view

​Server logs view

​Filtering logs by trace ID

Access server logs from trace view

Server logs view

Filtering logs by trace ID