What is the key difference between Leetcode MCP Server and Preflight?

Leetcode MCP Server belongs to the Coding Agents category with local stdio execution, while Preflight belongs to the Coding Agents category with local stdio execution.

How do I install Leetcode MCP Server or Preflight in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Leetcode MCP Server and Preflight free or paid?

Leetcode MCP Server operates under a Free / Open Source model (other). Preflight operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Leetcode MCP Server lists 9 tools with 5 views and 149 GitHub stars. Preflight lists 24 tools with 4 views and 12 GitHub stars.

Can I use both Leetcode MCP Server and Preflight together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Leetcode MCP Server vs Preflight

In-depth architectural comparison of the Leetcode MCP Server and Preflight MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Leetcode MCP Server

Coding Agents · Local stdio

Quality: 68/100 (Great) | Auth: other

Preflight

Coding Agents · Local stdio

Quality: 56/100 (Good) | Auth: No auth required

Verdict Summary: Choose Leetcode MCP Server if you need specialized Coding Agents tools running via a local process. Choose Preflight if your workspace requires Coding Agents integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Leetcode MCP Server when:

You need dedicated capabilities in the Coding Agents domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: other (Free / Open Source).
Primary tools included: get_daily_challenge, get_problem, search_problems.

Explore Leetcode MCP Server Details

Choose Preflight when:

You need dedicated capabilities in the Coding Agents domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: preflight_check, scope_work, clarify_intent.

Explore Preflight Details

Feature & Specification Comparison

Specification	Leetcode MCP Server jinzcdev Coding Agents	Preflight preflight-dev Coding Agents
Summary	MCP server enabling automated access to LeetCode's programming problems, solutions, submissions and public data with optional authentication for user-specific features (e.g., notes), supporting both leetcode.com (global) and leetcode.cn (China) sites.	24-tool MCP server for Claude Code that catches vague prompts before they waste tokens. Includes 12-category prompt scorecards, session history search with LanceDB vectors, cross-service contract awareness, correction pattern learning, and cost estimation.
Category & Scope

Tools & Capabilities Breakdown

Leetcode MCP Server Tools (9)

get_daily_challenge

Retrieves today's Daily Challenge problem with full description (read-only, no auth). Returns problem details for the current date as JSON. Use get_problem when you know a specific titleSlug; use search_problems to discover problems by filters.

get_problem

Retrieves a single LeetCode problem by titleSlug (read-only, no auth). Returns description, examples, constraints, and metadata as JSON. Use search_problems to find problems by keyword/tag/difficulty; use get_daily_challenge for today's featured problem.

search_problems

Searches LeetCode problems by category, tags, difficulty, and keywords (read-only, no auth). Supports pagination via limit/offset. Returns matching problem list as JSON. Use get_problem when you already know the titleSlug; use this to browse or discover problems.

get_user_profile

Retrieves any user's public profile by username (read-only, no auth). Returns ranking, avatar, bio, submission stats, and platform-specific progress. Use this to look up other users or public stats. Use get_user_status (requires auth) instead to verify the current session user's login state—not for looking up arbitrary users.

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Leetcode MCP Server Configuration

mcpServers (Claude Desktop / Cursor)

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

Preflight Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "preflight-dev-preflight": {
      "command": "npx",
      "args": [
        "-y",
        "preflight-dev-serve"
      ]
    }
  }
}

Frequently Asked Questions

Leetcode MCP Server is categorized under Coding Agents and uses a local stdio subprocess. In contrast, Preflight belongs to Coding Agents using local stdio subprocess. Select Leetcode MCP Server when you need capabilities focused on coding agents and Preflight when you require tools for coding agents.

More alternatives to Leetcode MCP Server More alternatives to Preflight Coding Agents category hub