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LangSmith (uvx) MCP Server

Community

Contributed by LangChain

Connect to LangSmith to fetch conversation history, prompts, traces, runs, datasets, experiments, and billing usage data from your LangChain observability platform.

Install with McpMuxSource CodeDocs

About the LangSmith (uvx) MCP Server

The LangSmith (uvx) MCP server is a local (stdio) Model Context Protocol server available in the McpMux registry. Connect to LangSmith to fetch conversation history, prompts, traces, runs, datasets, experiments, and billing usage data from your LangChain observability platform. This is a community-contributed MCP server by LangChain.

Install the LangSmith (uvx) MCP server with one click using McpMux. It works with Cursor, Claude Desktop, Claude Code, VS Code, ChatGPT, Windsurf, JetBrains, and any MCP-compatible AI client. This server requires an API key — McpMux securely stores your credentials with AES-256-GCM encryption.

Transport Configuration

Transport Configuration
{
  "type": "stdio",
  "command": "uvx",
  "args": [
    "langsmith-mcp-server"
  ],
  "env": {
    "LANGSMITH_API_KEY": "${input:LANGSMITH_API_KEY}"
  },
  "metadata": {
    "inputs": [
      {
        "id": "LANGSMITH_API_KEY",
        "label": "LangSmith API Key",
        "description": "Your LangSmith API key, used to authenticate against the LangSmith API for traces, runs, prompts, and datasets.",
        "type": "text",
        "required": true,
        "secret": true,
        "placeholder": "lsv2_************************",
        "obtain": {
          "url": "https://smith.langchain.com/settings",
          "instructions": "1. Sign in at smith.langchain.com\n2. Open Settings\n3. Go to API Keys\n4. Create a new API key\n5. Copy the key (it begins with lsv2_)",
          "button_label": "Get API Key"
        }
      }
    ]
  }
}
Details
TransportLocal (stdio)
Hostinglocal
AuthAPI Key
Capabilities
Tools

Categories

Ai MlMonitoring

Tags

langsmithlangchainobservabilitytracingllmmonitoringpromptsdatasets

Links

RepositoryHomepageDocumentation

Supported AI Clients

The LangSmith (uvx) MCP server works with all MCP-compatible AI clients through McpMux:

CursorClaude DesktopClaude CodeVS CodeChatGPTWindsurfJetBrainsZedClineGemini CLIAmazon Q

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Install LangSmith (uvx) with McpMux

One-click install from the McpMux desktop app. Auto-configures for Cursor, Claude, VS Code, ChatGPT, Windsurf, JetBrains, and any MCP-compatible client.

Install