mcp-server-langfuse

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.

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

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

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

npm install

# build current file
npm run build

# test in mcp inspector
npx @modelcontextprotocol/inspector node ./build/index.js

npm install
npm run build

Configure Cl