langfuse

local MCP server

Installation

Terminal

claude mcp add langfuse -e LANGFUSE_SECRET_KEY=... -e LANGFUSE_PUBLIC_KEY=... -e LANGFUSE_BASE_URL=... -- npx -y langfuse-observability-mcp-server

Run in your project folder. Add --scope user to use it everywhere.

Claude Desktop, Cursor & other clients

Add to claude_desktop_config.json or .cursor/mcp.json.

{
  "mcpServers": {
    "langfuse": {
      "command": "npx",
      "args": [
        "-y",
        "langfuse-observability-mcp-server"
      ],
      "env": {
        "LANGFUSE_SECRET_KEY": "...",
        "LANGFUSE_PUBLIC_KEY": "...",
        "LANGFUSE_BASE_URL": "..."
      }
    }
  }
}

Fill in the environment variables with your own credentials.

Summary

MCP server for Langfuse LLM observability — trace and observation analysis.

Questions

langfuse is a local MCP server distributed as the npm package langfuse-observability-mcp-server.

Run: claude mcp add langfuse -e LANGFUSE_SECRET_KEY=... -e LANGFUSE_PUBLIC_KEY=... -e LANGFUSE_BASE_URL=... -- npx -y langfuse-observability-mcp-server

Run: codex mcp add langfuse --env LANGFUSE_SECRET_KEY=... --env LANGFUSE_PUBLIC_KEY=... --env LANGFUSE_BASE_URL=... -- npx -y langfuse-observability-mcp-server

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