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.
LeetCode MCP Server
@jinzcdev
Basic information
About LeetCode MCP Server
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.
LeetCode MCP Server config
Add this server to your MCP-compatible client using the configuration below.
{
"mcpServers": {
"leetcode-mcp-server": {
"command": "npx",
"args": [
"-y",
"@smithery/cli",
"install",
"@jinzcdev/leetcode-mcp-server",
"--client",
"claude"
]
}
}
}LeetCode MCP Server tools
Tool list not available yet
This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.
Fetch the live tool list by running this server in a temporary sandbox using the button above.
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
Frequently asked questions
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).
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