
LangSmith MCP Server
250,000+ developers - the LLM observability & prompt engineering hub by LangChain.
smith.langchain.comLangSmith is the observability and evaluation platform built by the LangChain team - 250,000+ developers use it to debug, monitor, and optimize their LLM applications. This MCP Server gives your agent access to traces, runs, datasets, and evaluation results: inspect chain executions step-by-step, analyze latency and token usage, compare prompt versions, and run automated evaluations. Your agent becomes the eyes of your AI pipeline - catching regressions, surfacing performance bottlenecks, and ensuring every chain runs at peak efficiency.


























