LeetCode MCP Server
@jinzcdev
An MCP server enabling automated access to LeetCode's problems, solutions, and public data with optional authentication for user-specific features, supporting leetcode.com & leetcode.cn sites.
Overview
What is LeetCode MCP Server?
The LeetCode MCP Server is a Model Context Protocol server that integrates with LeetCode APIs, providing automated access to problems, contests, solutions, and user data. It supports both LeetCode Global (leetcode.com) and LeetCode China (leetcode.cn) platforms.
How to use LeetCode MCP Server?
Install the server globally via npm install @jinzcdev/leetcode-mcp-server -g or run directly with npx -y @jinzcdev/leetcode-mcp-server. Optionally provide a LeetCode session cookie (--session <COOKIE>) for authenticated features. Configure the server as an MCP client (e.g., VS Code) by setting the command, arguments, or environment variables LEETCODE_SITE and LEETCODE_SESSION.
Key features of LeetCode MCP Server
- Multi-site support for LeetCode Global and LeetCode China
- Retrieve problem descriptions, constraints, examples, and editorials
- Access user profiles, submission history, and contest rankings
- Authenticated access to private data: notes, progress, and submissions
- Advanced problem search by tags, difficulty, category, and keywords
- Run and submit code with polling until completion
Use cases of LeetCode MCP Server
- Automate daily challenge retrieval and problem analysis
- Search and filter problems for targeted practice sessions
- Analyze submission results (AC/WA) and track solving progress
- Manage personal notes on problems (LeetCode China only)
- Integrate LeetCode data into AI‑powered coding assistants
FAQ from LeetCode MCP Server
What are the prerequisites for running LeetCode MCP Server?
Node.js v20.x or above is required. A LeetCode session cookie is optional and only needed for authenticated API access.
Do I need a LeetCode session cookie?
No, most tools work without authentication. However, tools for private data (e.g., notes, submission history, code running/submission) require a valid session cookie.
Which LeetCode platforms are supported?
Both LeetCode Global (leetcode.com) and LeetCode China (leetcode.cn) are supported. Specify the site with the --site argument or LEETCODE_SITE environment variable.
How do I configure the server in VS Code?
Add a JSON configuration to your User Settings under mcp.servers.leetcode, setting the command to npx, args to ["-y", "@jinzcdev/leetcode-mcp-server"], and optionally specifying LEETCODE_SITE and LEETCODE_SESSION in the env or as additional args.
What takes priority if I specify both environment variables and command-line arguments?
Command-line arguments take precedence over environment variables when both are provided for the same setting (site or session).
