A
securityA
licenseA
qualityA powerful Model Context Protocol framework that extends Cursor IDE with tools for web content retrieval, PDF processing, and Word document parsing.
Last updated -
8
13
MIT License
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 promptsOptional 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 promptTransforms 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 promptsOptional
cursorparameter for paginationReturns a list of prompts with their arguments
get-prompt: Retrieve and compile a specific promptRequired
nameparameter: Name of the prompt to retrieveOptional
argumentsparameter: JSON object with prompt variables
Development
npm install
# build current file
npm run build
# test in mcp inspector
npx @modelcontextprotocol/inspector node ./build/index.js
Usage
Step 1: Build
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
{
"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.com"
}
}
}
}
Make sure to replace the environment variables with your actual Langfuse API keys. The server will now be available to use in Claude Desktop.
Cursor
Add new server to Cursor:
Name:
Langfuse PromptsType:
commandCommand:
LANGFUSE_PUBLIC_KEY="your-public-key" LANGFUSE_SECRET_KEY="your-secret-key" LANGFUSE_BASEURL="https://cloud.langfuse.com" node absolute-path/build/index.js
Limitations
The MCP Server is a work in progress and has some limitations:
Only prompts with a
productionlabel in Langfuse are returnedAll arguments are assumed to be optional and do not include descriptions as variables do not have specification in Langfuse
List operations require fetching each prompt individually in the background to extract the arguments, this works but is not efficient
Contributions are welcome! Please open an issue or a PR (repo) if you have any suggestions or feedback.
This server cannot be installed
hybrid server
The server is able to function both locally and remotely, depending on the configuration or use case.
Facilitates access and management of Langfuse prompts through the Model Context Protocol, enabling prompt discovery, retrieval, and integration within clients like Claude Desktop and Cursor.
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