Langfuse MCP server for accessing and analyzing telemetry data via natural language
Until 2026-09-24 this record combined several servers published from one repository. The others now have records of their own: langfuse-mcp. Checks from before that date include them.
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# Langfuse MCP Server [](https://badge.fury.io/py/langfuse-mcp) [](https://www.python.org/downloads/) [](https://opensource.org/licenses/MIT) [Model Context Protocol](https://modelcontextprotocol.io) server for [Langfuse](https://langfuse.com) observability. Query traces, debug errors, analyze sessions, manage prompts. ## Why langfuse-mcp? Comparison with [official Langfuse MCP](https://github.com/langfuse/mcp-server-langfuse) (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 | | **Selective Tool Loading** | Yes | No | This project provides a **full observability toolkit** — traces, observations, sessions, exceptions, and prompts — while the official MCP focuses on prompt management. ## Quick Start Requires [uv](https://docs.astral.sh/uv/getting-started/installation/) (for `uvx`). Get credentials from [Langfuse Cloud](https://cloud.langfuse.com) → Settings → API Keys. If self-hosted, use your instance URL for `LANGFUSE_HOST`. ```bash # 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 --python 3.11 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 --python 3.11 langfuse-mcp ``` Restart your CLI, then verify with `/mcp` (Claude Code) or `codex mcp list` (Codex). ## Tools (25 total) | Category | Tools | |-…
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