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LangSmith MCP
42
Stack Score
Editorial pick✓ Verified workingMCP server
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LangSmith MCP

LangSmith trace + eval + dataset ops.

Try LangSmith MCP

Best for

Best for AI engineering teams running LangSmith observability.

At a glance

Pricing
open-source
Setup time
15 minutes
Learning curve
easy
Last verified
5/26/2026

What we love

  • ✓LangChain-maintained
  • ✓Strong LLM-app tracing
  • ✓Dataset + eval surface

Where it falls short

  • −LangSmith plan required
  • −Best inside LangChain stack
  • −Per-trace pricing

Pricing

✓ Pricing verified Jun 14, 2026

1 tier

Open-source

$0

perpetual

  • ✓MIT

Overview

MCP server for LangSmith — trace + run query, dataset + eval ops, project mgmt. Lets Claude query LLM-app observability data.

Key features

  • ●Trace + run query
  • ●Dataset + eval ops
  • ●Project + tag mgmt
  • ●API key auth
  • ●LangChain-native

Best use cases

LLM-app debugging

Let Claude query LangSmith traces during incident investigation.

Eval-driven dev

Run + analyze evals across LLM apps via Claude.

Integrations

LangSmith
LangChain
LangGraph
Python
JS

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