OpenFeature MCP Local Server (stdio)

Warning

This project is in active development and intended for testing only. APIs, prompts, and behavior may change without notice. Do not use in production.

A local Model Context Protocol (MCP) server that provides OpenFeature SDK installation guidance over stdio.

Features

• No Authentication Required: Simplified implementation without OAuth or user management
• OpenFeature SDK Installation Guides: Fetch installation prompts for various OpenFeature SDKs
• MCP stdio Transport: Intended for local usage by MCP-compatible clients

Configure your AI client (local)

Cursor

Add to ~/.cursor/mcp_settings.json:

{
  "mcpServers": {
    "OpenFeature": {
      "command": "npx",
      "args": ["-y", "@openfeature/mcp"]
    }
  }
}

VS Code (Continue)

Add to .continue/config.json:

{
  "mcpServers": {
    "OpenFeature": {
      "command": "npx",
      "args": ["-y", "@openfeature/mcp"]
    }
  }
}

Claude Code (CLI)

Add the server via CLI:

claude mcp add --transport stdio openfeature npx -y @openfeature/mcp

Then manage the connection in the CLI with /mcp.

Windsurf

In the "Manage MCP servers" raw config, add:

{
  "mcpServers": {
    "OpenFeature": {
      "command": "npx",
      "args": ["-y", "@openfeature/mcp"]
    }
  }
}

Claude Desktop

Edit your Claude Desktop config and add:

{
  "mcpServers": {
    "openfeature": {
      "command": "npx",
      "args": ["-y", "@openfeature/mcp"]
    }
  }
}

Restart Claude Desktop after saving.

NPM Global install (optional)

If you prefer a global install instead of NPX:

npm install -g @openfeature/mcp

Now in your MCP config use openfeature-mcp as the command:

{
  "mcpServers": {
    "openfeature": {
      "command": "openfeature-mcp"
    }
  }
}

All logs are written to stderr. The MCP protocol messages use stdout.

Available Tools

install_openfeature_sdk

Fetches and returns OpenFeature SDK install prompt Markdown for a given guide from the bundled prompts.

Parameters:

• guide (string enum): One of the supported guides listed below

Supported Guides (bundled):

• android
• dotnet
• go
• ios
• java
• javascript
• nestjs
• nodejs
• php
• python
• react
• ruby

Development

Prerequisites

• Node.js 18+

Setup

1. Install dependencies:

   npm install

2. Add or edit install guides in the prompts/ folder (Markdown). These are bundled at build time.

3. Build prompts bundle:

   npm run build-prompts

4. Build TypeScript:

   npm run build

5. Run locally (binary entrypoint):

   node dist/cli.js