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How to add Langfuse Prompt Management MCP Server to Claude Desktop

Access and manage your Langfuse prompts through the Model Context Protocol. Paste the config into ~/Library/Application Support/Claude/claude_desktop_config.json and restart Claude Desktop.

Last updated June 14, 2026 · 166★ · stdio · apikey · official

Claude Desktop config for Langfuse Prompt Management MCP Server

npm install && npm run build
{
  "mcpServers": {
    "langfuse-prompt-management-mcp-server": {
      "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"
      }
    }
  }
}

Setup steps

  1. 1Open Claude Desktop → Settings → Developer → Edit Config (this opens ~/Library/Application Support/Claude/claude_desktop_config.json).
  2. 2Paste the Langfuse Prompt Management MCP Server config below under the top-level "mcpServers" key.
  3. 3Fill in any placeholder secrets (API keys, paths) in the snippet.
  4. 4Save the file, then fully quit and reopen Claude Desktop.
  5. 5Open a chat and confirm Langfuse Prompt Management MCP Server's tools appear under the 🔌 tools menu.

Before you start

  • Node.js (to run the built server with `node`)
  • A Langfuse account with public and secret API keys
  • Build the server locally with `npm install` and `npm run build`

What Langfuse Prompt Management MCP Server can do in Claude Desktop

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) and optional `arguments` parameter (a JSON object with prompt variables).

Security

Requires your Langfuse public and secret API keys, passed via the LANGFUSE_PUBLIC_KEY and LANGFUSE_SECRET_KEY environment variables. The secret key grants access to your Langfuse project's prompts; keep it out of source control.

Langfuse Prompt Management MCP Server + Claude Desktop FAQ

Where is the Claude Desktop config file?

Claude Desktop reads MCP servers from ~/Library/Application Support/Claude/claude_desktop_config.json. Paste the Langfuse Prompt Management MCP Server config there under the "mcpServers" key and restart the client.

Is Langfuse Prompt Management MCP Server safe to use with Claude Desktop?

Requires your Langfuse public and secret API keys, passed via the LANGFUSE_PUBLIC_KEY and LANGFUSE_SECRET_KEY environment variables. The secret key grants access to your Langfuse project's prompts; keep it out of source control.

Which prompts are returned?

Only prompts with a `production` label in Langfuse are returned.

Are prompt arguments described?

All arguments are assumed to be optional and do not include descriptions, because variables do not have a specification in Langfuse.

How do I use it with Cursor?

Add a new server in Cursor of type `command`, with the command running `node absolute-path/build/index.js` and the LANGFUSE_PUBLIC_KEY, LANGFUSE_SECRET_KEY, and LANGFUSE_BASEURL environment variables set inline.

View repo Full Langfuse Prompt Management MCP Server page