interactive-leetcode-mcp

Interactive LeetCode MCP

Current project is under active development and may not work perfectly

Features

• 🔐 AI-guided authentication - Claude walks you through one-time credential setup
• 🎓 Learning-guided mode - AI provides hints before solutions to maximize learning
• 📝 Solution submission - Submit code and get instant results
• 💬 Conversational workflow - Practice naturally with Claude Code
• 🌍 Multi-language support - Java, Python, C++, JavaScript, TypeScript, and more
• 📊 Detailed feedback - Runtime stats, memory usage, failed test cases
• 📚 Problem data - Descriptions, constraints, examples, editorial solutions
• 👤 User tracking - Profile data, submission history, contest rankings

Prerequisites

• Node.js v20.x or above
• LeetCode account
• Any modern web browser (Chrome, Firefox, Safari, Edge, etc.)

Installation

Via NPM (Recommended)

npm install -g @sperekrestova/interactive-leetcode-mcp
interactive-leetcode-mcp --version
interactive-leetcode-mcp --help

You can also run the package without installing it globally:

npx -y @sperekrestova/interactive-leetcode-mcp@latest --version

From Source

git clone https://github.com/SPerekrestova/interactive-leetcode-mcp.git
cd interactive-leetcode-mcp
npm install && npm run build
npm link

Fresh Environment Smoke Test

Use this to verify the published npm package from a clean directory without any LeetCode credentials:

mkdir leetcode-mcp-smoke
cd leetcode-mcp-smoke
npm init -y
npm install @sperekrestova/interactive-leetcode-mcp
npx --no-install interactive-leetcode-mcp --version
npx --no-install interactive-leetcode-mcp --help

Those commands confirm that Node can install the package and expose the CLI binary. For actual MCP server validation, use an integration test that connects over stdio and completes the MCP handshake.

Configuration

Claude Code & Claude Desktop

You can execute this command in CLI

claude mcp add --transport stdio leetcode -- npx -y @sperekrestova/interactive-leetcode-mcp@latest

Or add to your MCP configuration file (~/.config/claude-code/mcp.json) or (~/Library/Application Support/Claude/claude_desktop_config.json):

{
  "mcpServers": {
    "leetcode": {
      "command": "npx",
      "args": ["-y", "@sperekrestova/interactive-leetcode-mcp@latest"]
    }
  }
}

Local build

{
  "mcpServers": {
    "leetcode": {
      "command": "node",
      "args": ["/path/to/this/project/interactive-leetcode-mcp/build/index.js"]
    }
  }
}

Quick Start

1. Authorize with LeetCode

You: "Authorize with LeetCode"
Claude: [Opens LeetCode in your browser and guides you through the process]
Claude: "Please log in to your account. Once logged in, I'll walk you through
        getting two cookie values we need. First, press F12 to open DevTools..."
You: [Follows Claude's step-by-step guidance]
You: "Here are my cookies: csrftoken is abc123... and LEETCODE_SESSION is xyz789..."
Claude: "✓ Perfect! Your credentials are validated and saved. Welcome back, johndoe!"

2. Practice a Problem

You: "I want to practice two-sum"
Claude: [Fetches problem and creates working file]

3. Get Help When Stuck

You: "Give me a hint"
Claude: [Provides contextual guidance based on your code]

4. Submit Your Solution

You: "Submit my solution"
Claude: "🎉 Accepted! Runtime: 2ms (beats 95.3%)"

Available Tools

Getting Started

get_started

• Returns the server usage guide, learning flow, authentication flow, and submission language map
• Call this at the start of a LeetCode practice session

Authorization

start_leetcode_auth

• Initiates authentication flow
• Opens browser to LeetCode login (when possible)
• Returns structured instructions for AI agent to guide you
• No parameters required

save_leetcode_credentials