Is Langfuse Mcp safe to use?

Langfuse Mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.

How do I install Langfuse Mcp?

Langfuse Mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can Langfuse Mcp do?

Langfuse Mcp provides 37 tools: fetch_traces, fetch_trace, fetch_observations, fetch_observation, fetch_sessions and 32 more. See the full tools list on the server page for descriptions and parameters.

What AI clients work with Langfuse Mcp?

Langfuse Mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.

Is Langfuse Mcp actively maintained?

Langfuse Mcp is actively maintained — last commit was 7 days ago. It has 90 GitHub stars.

Langfuse Mcp

Name: Langfuse Mcp
Author: avivsinai

skills · by avivsinai

A Model Context Protocol (MCP) server for Langfuse, enabling AI agents to query Langfuse trace data for enhanced debugging and observability

90 1.1M/wk 37 tools GitHub npm PyPI

No known CVEs

MIT license

Actively maintained

Last commit 7d ago

Works with most clients

Transport: stdio, http

37 tools · ~1.5k tok

Grade C · 0.8% of 200K ctx

Edit this pageView history

AI / ML Analytics

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "langfuse": {
      "env": {
        "LANGFUSE_HOST": "https://cloud.langfuse.com",
        "LANGFUSE_PUBLIC_KEY": "pk-...",
        "LANGFUSE_SECRET_KEY": "sk-...",
        "LANGFUSE_MCP_DEFAULT_OUTPUT_MODE": "full_json_file"
      },
      "args": [
        "langfuse-mcp"
      ],
      "command": "uvx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/langfuse-mcp)](https://mcppedia.org/s/langfuse-mcp)

Read me

What Langfuse Mcp does

A Model Context Protocol (MCP) server for Langfuse, enabling AI agents to query Langfuse trace data for enhanced debugging and observability

Test This Server

This server supports HTTP transport. Be the first to test it — help the community know if it works.

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

85/100across 5 weighted dimensions

How we score →

0255075100

−15

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked skills against OSV.dev.

Inventory

Tools (37)

Click any tool to inspect its schema.

~1.5k tokens total

Help improve this page

This server is missing a description.If you've used it, help the community.

Add information

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is Langfuse Mcp safe to use?: Langfuse Mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.
How do I install Langfuse Mcp?: Langfuse Mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can Langfuse Mcp do?: Langfuse Mcp provides 37 tools: fetch_traces, fetch_trace, fetch_observations, fetch_observation, fetch_sessions and 32 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with Langfuse Mcp?: Langfuse Mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.
Is Langfuse Mcp actively maintained?: Langfuse Mcp is actively maintained — last commit was 7 days ago. It has 90 GitHub stars.

Similar servers

Others in ai-ml / analytics

View all →

Memory MCP Server98

Persistent memory using a knowledge graph

86.4k 5

Sequential Thinking MCP Server98

Dynamic problem-solving through sequential thought chains

86.4k 1

Antigravity Workspace Template96

Workspace template + MCP server for Claude Code, Codex CLI, Cursor & Windsurf. Multi-agent knowledge engine (ag-refresh / ag-ask) that turns any codebase into a queryable AI assistant.

1.2k 2

Observability Mcp95

MCP Server for GCP environment for interacting with various Observability APIs.

799 10

MCP Security Weekly

Get CVE alerts and security updates for Langfuse Mcp and similar servers.

Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?

Edit this pageView history

AI / ML Analytics

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "langfuse": {
      "env": {
        "LANGFUSE_HOST": "https://cloud.langfuse.com",
        "LANGFUSE_PUBLIC_KEY": "pk-...",
        "LANGFUSE_SECRET_KEY": "sk-...",
        "LANGFUSE_MCP_DEFAULT_OUTPUT_MODE": "full_json_file"
      },
      "args": [
        "langfuse-mcp"
      ],
      "command": "uvx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/langfuse-mcp)](https://mcppedia.org/s/langfuse-mcp)

Read me

What Langfuse Mcp does

A Model Context Protocol (MCP) server for Langfuse, enabling AI agents to query Langfuse trace data for enhanced debugging and observability

Test This Server

This server supports HTTP transport. Be the first to test it — help the community know if it works.

README

Langfuse MCP Server

Agent-facing Model Context Protocol server and skill for Langfuse observability.

Use langfuse-mcp from Claude Code, Codex, Cursor, or any MCP client to query traces, inspect generations, debug exceptions, analyze sessions, manage prompts, browse datasets, and understand what your AI agents did in production.

What You Can Do

Debug failing agent runs from Langfuse traces and observations.
Find exceptions, slow generations, high-latency spans, and affected users.
Inspect sessions and user journeys without leaving your agent workflow.
Manage prompt versions, labels, datasets, annotation queues, and scores.
Install the included langfuse agent skill for ready-made debugging playbooks.

Why langfuse-mcp?

Langfuse is where your traces live. langfuse-mcp makes that telemetry directly usable by agents that need to answer questions like "what failed?", "why was this slow?", "which prompt version ran?", or "what happened in this user's session?"

Comparison with official Langfuse MCP (as of Jan 2026):

	langfuse-mcp	Official
Traces & Observations	Yes	No
Sessions & Users	Yes	No
Exception Tracking	Yes	No
Prompt Management	Yes	Yes
Dataset Management	Yes	No
Annotation Queues	Yes	No
Scores (v2)	Yes	No
Selective Tool Loading	Yes	No

This project provides a full observability toolkit — traces, observations, sessions, exceptions, prompts, datasets, annotation queues, and scores — while the official MCP focuses on prompt management.

Quick Start

Requires uv (for uvx) and Python 3.10 or newer. CI verifies Python 3.10 through 3.14.

Get credentials from Langfuse Cloud → Settings → API Keys. If self-hosted, use your instance URL for LANGFUSE_HOST.

# Claude Code (project-scoped, shared via .mcp.json)
claude mcp add \
  -e LANGFUSE_PUBLIC_KEY=pk-... \
  -e LANGFUSE_SECRET_KEY=sk-... \
  -e LANGFUSE_HOST=https://cloud.langfuse.com \
  --scope project \
  langfuse -- uvx langfuse-mcp

# Codex CLI (user-scoped, stored in ~/.codex/config.toml)
codex mcp add langfuse \
  --env LANGFUSE_PUBLIC_KEY=pk-... \
  --env LANGFUSE_SECRET_KEY=sk-... \
  --env LANGFUSE_HOST=https://cloud.langfuse.com \
  -- uvx langfuse-mcp

To pin a CI-verified interpreter explicitly, add --python 3.14 before langfuse-mcp.

Restart your CLI, then verify with /mcp (Claude Code) or codex mcp list (Codex).

Agent Skill

This repo ships a first-party langfuse skill for Claude Code and Codex. The skill gives agents concrete playbooks for trace debugging, exception triage, latency analysis, prompt management, and dataset work.

Install it when you want the agent to know when to reach for Langfuse and which MCP tools to call first.

Via skills (recommended):

npx skills add avivsinai/langfuse-mcp -g -y

Via skild:

npx skild install @avivsinai/langfuse -t claude -y

Manual install:

cp -r sk

... [View full README on GitHub](https://github.com/avivsinai/langfuse-mcp#readme)

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

85/100across 5 weighted dimensions

How we score →

0255075100

−15

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked skills against OSV.dev.

Inventory

Tools (37)

Click any tool to inspect its schema.

~1.5k tokens total

Help improve this page

This server is missing a description.If you've used it, help the community.

Add information

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is Langfuse Mcp safe to use?: Langfuse Mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.
How do I install Langfuse Mcp?: Langfuse Mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can Langfuse Mcp do?: Langfuse Mcp provides 37 tools: fetch_traces, fetch_trace, fetch_observations, fetch_observation, fetch_sessions and 32 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with Langfuse Mcp?: Langfuse Mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.
Is Langfuse Mcp actively maintained?: Langfuse Mcp is actively maintained — last commit was 7 days ago. It has 90 GitHub stars.

Similar servers

Others in ai-ml / analytics

View all →

Memory MCP Server98

Persistent memory using a knowledge graph

86.4k 5

Sequential Thinking MCP Server98

Dynamic problem-solving through sequential thought chains

86.4k 1

Antigravity Workspace Template96

Workspace template + MCP server for Claude Code, Codex CLI, Cursor & Windsurf. Multi-agent knowledge engine (ag-refresh / ag-ask) that turns any codebase into a queryable AI assistant.

1.2k 2

Observability Mcp95

MCP Server for GCP environment for interacting with various Observability APIs.

799 10

MCP Security Weekly

Get CVE alerts and security updates for Langfuse Mcp and similar servers.

Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?