Unleash MCP Server

@cuongtl1992

About Unleash MCP Server

A Model Context Protocol (MCP) server implementation that integrates with Unleash Feature Toggle system.

Config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "unleash-mcp": {
      "command": "npx",
      "args": [
        "@modelcontextprotocol/inspector",
        "node",
        "dist/index.js"
      ]
    }
  }
}

Tools

No tools detected

Fetch the live tool list by running this server in a temporary sandbox using the button above.

Overview

What is Unleash MCP Server?

A Model Context Protocol (MCP) server that bridges LLM applications with the Unleash feature flag system. It lets AI applications check feature flag status, expose flag information, create and update flags, and list all projects. Designed for developers who want to integrate Unleash flag management into LLM workflows.

How to use Unleash MCP Server?

Install dependencies with npm i, build with npm run build, then run with npm start. For Claude or Cursor, add an MCP config using npx -y unleash-mcp and set the environment variables UNLEASH_URL, UNLEASH_API_TOKEN, MCP_TRANSPORT, and MCP_HTTP_PORT. The server supports both stdio and HTTP/SSE transports.

Key features of Unleash MCP Server

Check feature flag status from Unleash
Expose feature flag information to LLMs
Create and update feature flags
List all projects via MCP resources
Supports stdio and HTTP/SSE transport modes

Use cases of Unleash MCP Server

An AI assistant queries flag status to decide behavior
Automated creation or updating of feature flags through an LLM
Listing all projects to provide context to an LLM

FAQ from Unleash MCP Server

What are the requirements?

Node.js v18 or higher, TypeScript v5.0 or higher, and access to an Unleash server instance.

How do I configure the server?

Set the environment variables UNLEASH_URL (your Unleash endpoint), UNLEASH_API_TOKEN (API token), MCP_TRANSPORT (e.g., stdio), and MCP_HTTP_PORT (e.g., 3001).

What transports does the server support?

It supports stdio transport and HTTP/SSE transport, with implementations in src/transport/stdio.ts and src/transport/http.ts.

Can I inspect the MCP server during development?

Yes. Use npm run build then npx @modelcontextprotocol/inspector node dist/index.js for stdio, or run npm start then npx @modelcontextprotocol/inspector for SSE.

Which operations are available?

The server provides tools to get a feature flag, get all projects, and create/update flags; resources expose flags and projects; prompts include single and batch flag checking.

Frequently asked questions