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Langfuse Prompt Management MCP Server

Model Context Protocol (MCP) Server for Langfuse Prompt Management. This server allows you to access and manage your Langfuse prompts through the Model Context Protocol.

Demo

Quick demo of Langfuse Prompts MCP in Claude Desktop (unmute for voice-over explanations):

https://github.com/user-attachments/assets/61da79af-07c2-4f69-b28c-ca7c6e606405

Features

MCP Prompt

This server implements the MCP Prompts specification for prompt discovery and retrieval.

prompts/list: List all available prompts
Optional cursor-based pagination
Returns prompt names and their required arguments, limitation: all arguments are assumed to be optional and do not include descriptions as variables do not have specification in Langfuse
Includes next cursor for pagination if there's more than 1 page of prompts
prompts/get: Get a specific prompt
Transforms Langfuse prompts (text and chat) into MCP prompt objects
Compiles prompt with provided variables

Tools

To increase compatibility with other MCP clients that do not support the prompt capability, the server also exports tools that replicate the functionality of the MCP Prompts.

get-prompts: List available prompts
Optional cursor parameter for pagination
Returns a list of prompts with their arguments
get-prompt: Retrieve and compile a specific prompt
Required name parameter: Name of the prompt to retrieve
Optional arguments parameter: JSON object with prompt variables

Development

```bash npm install

build current file

npm run build

test in mcp inspector

npx @modelcontextprotocol/inspector node ./build/index.js ```

Usage

Step 1: Build

bash npm install npm run build

Step 2: Add the server to your MCP servers:

Claude Desktop

Configure Claude for Desktop by editing claude_desktop_config.json

json { "mcpServers": { "langfuse": { "command": "node", "args": ["<absolute-path>/build/index.js"], "env": { "LANGFUSE_PUBLIC_KEY": "your-public-key", "LANGFUSE_SECRET_KEY": "your-secret-key", "LANGFUSE_BASEURL": "https://cloud.langfuse.co

Categories

Current Category: prompting

mcp-server-langfuse