Langfuse MCP Server

by avivsinaiio.github.avivsinai/langfuse-mcpv0.12.1

Query Langfuse traces, debug exceptions, analyze sessions and manage prompts for LLM applications.

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Active14d ago

Install Langfuse MCP server

claude mcp add langfuse-avivsinai -e LANGFUSE_PUBLIC_KEY='<langfuse-public-key>' -e LANGFUSE_SECRET_KEY='<langfuse-secret-key>' -- uvx langfuse-mcp

{
  "mcpServers": {
    "langfuse-avivsinai": {
      "command": "uvx",
      "args": [
        "langfuse-mcp"
      ],
      "env": {
        "LANGFUSE_PUBLIC_KEY": "<langfuse-public-key>",
        "LANGFUSE_SECRET_KEY": "<langfuse-secret-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "langfuse-avivsinai": {
      "command": "uvx",
      "args": [
        "langfuse-mcp"
      ],
      "env": {
        "LANGFUSE_PUBLIC_KEY": "<langfuse-public-key>",
        "LANGFUSE_SECRET_KEY": "<langfuse-secret-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "langfuse-avivsinai": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "langfuse-mcp"
      ],
      "env": {
        "LANGFUSE_PUBLIC_KEY": "<langfuse-public-key>",
        "LANGFUSE_SECRET_KEY": "<langfuse-secret-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "langfuse-avivsinai": {
      "command": "uvx",
      "args": [
        "langfuse-mcp"
      ],
      "env": {
        "LANGFUSE_PUBLIC_KEY": "<langfuse-public-key>",
        "LANGFUSE_SECRET_KEY": "<langfuse-secret-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
LANGFUSE_PUBLIC_KEY	yes	yes	Langfuse public API key
LANGFUSE_SECRET_KEY	yes	yes	Langfuse secret API key
LANGFUSE_HOST	—	—	Langfuse API base URL (Cloud or self-hosted)
LANGFUSE_MCP_READ_ONLY	—	—	Set true to disable write tools

Freshness

Active — last maintenance signal 14d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-09-25 · 14d ago · GitHub
Latest release
2026-09-25 · 14d ago · GitHub · v0.12.1
Package published
no data · npm/PyPI
Registry entry updated
2026-09-25 · 14d ago · official registry · v0.12.1

FAQ

›How do I install the Langfuse MCP server in Claude Code?

Run: claude mcp add langfuse-avivsinai -e LANGFUSE_PUBLIC_KEY='<langfuse-public-key>' -e LANGFUSE_SECRET_KEY='<langfuse-secret-key>' -- uvx langfuse-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Langfuse require an API key?

Yes. It expects LANGFUSE_PUBLIC_KEY, LANGFUSE_SECRET_KEY, of which 2 are secrets.

›Can I use Langfuse as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Langfuse in the official MCP registry?

Yes, as io.github.avivsinai/langfuse-mcp.