Langfuse MCP

A community-built Model Context Protocol server for Langfuse that allows AI agents to query trace data, debug sessions, and analyze exceptions. It provides first-class tools for local debugging, including finding exceptions by file or time, fetching trace details, and controlling token output via compact summaries or file dumps.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by avivsinai

You need:Install is uvx langfuse-mcp plus Langfuse API keys

Vendor documentation

What you can do with it

Find exceptions in the last day
Fetch trace details by trace ID
Debug traces and sessions locally
Analyze error-level observations

Source and maintenance

Community listingRegistry 0.14.0

mcp-registry: io.github.avivsinai/langfuse-mcp@0.14.0 Source repository Project website

Maintenance checked: Nov 1, 2026, 5:02 AM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

langfuse-mcp 0.14.0

pypiuvx

langfuse-mcp package definition

{
  "version": "0.14.0",
  "transport": "stdio",
  "identifier": "langfuse-mcp",
  "runtimeHint": "uvx",
  "registryType": "pypi",
  "registryBaseUrl": "https://pypi.org",
  "environmentVariables": [
    {
      "name": "LANGFUSE_PUBLIC_KEY",
      "format": "string",
      "isRequired": true,
      "description": "Langfuse public API key"
    },
    {
      "name": "LANGFUSE_SECRET_KEY",
      "format": "string",
      "isRequired": true,
      "description": "Langfuse secret API key"
    },
    {
      "name": "LANGFUSE_HOST",
      "format": "string",
      "default": "https://cloud.langfuse.com",
      "description": "Langfuse API base URL (Cloud or self-hosted)"
    },
    {
      "name": "LANGFUSE_MCP_READ_ONLY",
      "format": "boolean",
      "default": "false",
      "description": "Set true to disable write tools"
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "langfuse-mcp": {
      "command": "uvx",
      "args": [
        "langfuse-mcp==0.14.0"
      ],
      "env": {
        "LANGFUSE_PUBLIC_KEY": "<YOUR_LANGFUSE_PUBLIC_KEY>",
        "LANGFUSE_SECRET_KEY": "<YOUR_LANGFUSE_SECRET_KEY>",
        "LANGFUSE_HOST": "<YOUR_LANGFUSE_HOST>",
        "LANGFUSE_MCP_READ_ONLY": "<YOUR_LANGFUSE_MCP_READ_ONLY>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "langfuse-mcp": {
      "command": "uvx",
      "args": [
        "langfuse-mcp==0.14.0"
      ],
      "env": {
        "LANGFUSE_PUBLIC_KEY": "<YOUR_LANGFUSE_PUBLIC_KEY>",
        "LANGFUSE_SECRET_KEY": "<YOUR_LANGFUSE_SECRET_KEY>",
        "LANGFUSE_HOST": "<YOUR_LANGFUSE_HOST>",
        "LANGFUSE_MCP_READ_ONLY": "<YOUR_LANGFUSE_MCP_READ_ONLY>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "langfuse-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "langfuse-mcp==0.14.0"
      ],
      "env": {
        "LANGFUSE_PUBLIC_KEY": "<YOUR_LANGFUSE_PUBLIC_KEY>",
        "LANGFUSE_SECRET_KEY": "<YOUR_LANGFUSE_SECRET_KEY>",
        "LANGFUSE_HOST": "<YOUR_LANGFUSE_HOST>",
        "LANGFUSE_MCP_READ_ONLY": "<YOUR_LANGFUSE_MCP_READ_ONLY>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "langfuse-mcp": {
      "command": "uvx",
      "args": [
        "langfuse-mcp==0.14.0"
      ],
      "env": {
        "LANGFUSE_PUBLIC_KEY": "<YOUR_LANGFUSE_PUBLIC_KEY>",
        "LANGFUSE_SECRET_KEY": "<YOUR_LANGFUSE_SECRET_KEY>",
        "LANGFUSE_HOST": "<YOUR_LANGFUSE_HOST>",
        "LANGFUSE_MCP_READ_ONLY": "<YOUR_LANGFUSE_MCP_READ_ONLY>"
      }
    }
  }
}

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