LeetCode MCP Server

The LeetCode MCP Server is a Model Context Protocol (MCP) server that provides seamless integration with LeetCode APIs, enabling advanced automation and intelligent interaction with LeetCode's programming problems, contests, solutions, and user data.

Features

• 🌐 Multi-site Support: Support​ both leetcode.com (Global) and leetcode.cn (China) platforms
• 📊 Problem Data Retrieval: Obtain detailed problem descriptions, constraints, examples, official editorials, and ​user-submitted solutions
• 👤 User Data Access: Retrieve user profiles, submission history, and contest performance
• 🔒 ​Private Data Access: Create and query user notes, track problem-solving progress, and analyze submission details (AC/WA analysis)
• 🔍 Advanced Search Capabilities: Filter problems by tags, difficulty levels, categories, and keywords
• 📅 Daily Challenge Access: Easily access daily challenge problems

Prerequisites

1. Node.js (v20.x or above)
2. (Optional) LeetCode session cookie for authenticated API access

Installation

Installing via Smithery

To install leetcode-mcp-server for Claude Desktop automatically via Smithery:

npx -y @smithery/cli install @jinzcdev/leetcode-mcp-server --client claude

Manual Installation

# Install from npm
npm install @jinzcdev/leetcode-mcp-server -g

# Or run with Global site configuration
npx -y @jinzcdev/leetcode-mcp-server --site global

# Run with authentication (for accessing private data)
npx -y @jinzcdev/leetcode-mcp-server --site global --session <YOUR_LEETCODE_SESSION_COOKIE>

Alternatively, you can clone the repository and run it locally:

# Clone the repository
git clone https://github.com/jinzcdev/leetcode-mcp-server.git

# Navigate to the project directory
cd leetcode-mcp-server

# Build the project
npm install && npm run build

# Run the server
node build/index.js --site global

Usage

Visual Studio Code Integration

Add the following JSON configuration to your User Settings (JSON) file. Access this by pressing Ctrl/Cmd + Shift + P and searching for Preferences: Open User Settings (JSON).

Option 1: Using Environment Variables

{
  "mcp": {
    "servers": {
      "leetcode": {
        "type": "stdio",
        "command": "npx",
        "args": ["-y", "@jinzcdev/leetcode-mcp-server"],
        "env": {
          "LEETCODE_SITE": "global",
          "LEETCODE_SESSION": "<YOUR_LEETCODE_SESSION_COOKIE>"
        }
      }
    }
  }
}

Option 2: Using Command Line Arguments

{
  "mcp": {
    "servers": {
      "leetcode": {
        "type": "stdio",
        "command": "npx",
        "args": [
          "-y",
          "@jinzcdev/leetcode-mcp-server",
          "--site",
          "global",
          "--session",
          "<YOUR_LEETCODE_SESSION_COOKIE>"
        ]
      }
    }
  }
}

For LeetCode China site, modify the --site parameter to cn.

[!TIP]

The server supports the following optional environment variables:

• LEETCODE_SITE: LeetCode API endpoint ('global' or 'cn', default: 'global')
• LEETCODE_SESSION: LeetCode session cookie for authenticated API access (default: empty)

Priority Note: Command-line arguments take precedence over environment variables when both are specified. For example:

• If LEETCODE_SITE=cn is set but you run leetcode-mcp-server --site global, the server will use global.
• If LEETCODE_SESSION exists but you provide --session "new_cookie", the command-line session value will be used.

Available Tools

Problems

Tool	Global	CN	Auth Required	Description
get_daily_challenge	✅	✅	❌	Retrieves today's LeetCode Daily Challenge problem
get_problem	✅	✅	❌	Retrieves details for a specific LeetCode problem
search_problems	✅	✅	❌	Searches for LeetCode problems with multiple filter criteria

Users

Tool	Global	CN	Auth Required	Description
get_user_profile	✅	✅	❌	Retrieves profile information for a LeetCode user
get_user_contest_ranking	✅	✅	❌	Obtains contest ranking statistics for a user
get_recent_ac_submissions	✅	✅	❌	Retrieves a user's recent accepted submissions
get_recent_submissions	✅	❌	❌	Retrieves a user's recent submissions history
get_user_status	✅	✅	✅	Retrieves current user's current status
get_problem_submission_report	✅	✅	✅	Provides detailed submission analysis for a specific problem
get_problem_progress	✅	✅	✅	Retrieves current user's problem-solving progress
get_all_submissions	✅	✅	✅	Retrieves current user's submission history

Submissions

Tool	Global	CN	Auth Required	Description
run_code	✅	✅	✅	Runs code for a problem and polls /check/ until finished
submit_solution	✅	✅	✅	Submits code for a problem and polls /check/ until finished

Notes

Tool	Global	CN	Auth Required	Description
search_notes	❌	✅	✅	Searches for user notes with filtering options
get_note	❌	✅	✅	Retrieves notes for a specific problem by question ID
create_note	❌	✅	✅	Creates a new note for a specific problem
update_note	❌	✅	✅	Updates an existing note with new content

Solutions

Tool	Global	CN	Auth Required	Description
list_problem_solutions	✅	✅	❌	Retrieves a list of community solutions for a specific problem
get_problem_solution	✅	✅	❌	Retrieves the complete content of a specific solution

Tool Parameters

Problems

• get_daily_challenge - Retrieves today's LeetCode Daily Challenge problem with complete details

  • No parameters required

• get_problem - Retrieves details about a specific LeetCode problem

  • titleSlug: The URL slug/identifier of the problem (string, required)

• search_problems - Searches for LeetCode problems based on multiple filter criteria

  • category: Problem category filter (string, optional, default: "all-code-essentials")
  • tags: List of topic tags to filter problems by (string[], optional)
  • difficulty: Problem difficulty level filter (enum: "EASY", "MEDIUM", "HARD", optional)
  • searchKeywords: Keywords to search in problem titles and descriptions (string, optional)
  • limit: Maximum number of problems to return (number, optional, default: 10)
  • offset: Number of problems to skip (number, optional)

Users

• get_user_profile - Retrieves profile information about a LeetCode user

  • username: LeetCode username (string, required)

• get_user_contest_ranking - Retrieves a user's contest ranking information

  • username: LeetCode username (string, required)
  • attended: Whether to include only the contests the user has participated in (boolean, optional, default: true)

• get_recent_submissions - Retrieves a user's recent submissions on LeetCode Global

  • username: LeetCode username (string, required)
  • limit: Maximum number of submissions to return (number, optional, default: 10)

• get_recent_ac_submissions - Retrieves a user's recent accepted submissions

  • username: LeetCode username (string, required)
  • limit: Maximum number of submissions to return (number, optional, default: 10)

• get_user_status - Retrieves the current user's status

  • No parameters required

• get_problem_submission_report - Retrieves detailed information about a specific submission

  • id: The numerical submission ID (number, required)

• get_problem_progress - Retrieves the current user's problem-solving progress

  • offset: Number of questions to skip (number, optional, default: 0)
  • limit: Maximum number of questions to return (number, optional, default: 100)
  • questionStatus: Filter by question status (enum: "ATTEMPTED", "SOLVED", optional)
  • difficulty: Filter by difficulty levels (string[], optional)

• get_all_submissions - Retrieves paginated list of user's submissions

  • limit: Maximum number of submissions to return (number, default: 20)
  • offset: Number of submissions to skip (number, default: 0)
  • questionSlug: Optional problem identifier (string, optional)
  • lang: Programming language filter (string, optional, CN only)
  • status: Submission status filter (enum: "AC", "WA", optional, CN only)
  • lastKey: Pagination token for retrieving next page (string, optional, CN only)

Submissions

• run_code - Runs code for a specific problem and waits until finished (requires authentication)

  • titleSlug: The URL slug/identifier of the problem (string, required)
  • lang: Programming language (string enum, required)
  • typedCode: Source code to run (string, required)
  • dataInput: Custom input to run (string, optional)
  • timeoutMs: Polling timeout in milliseconds (number, optional, default: 120000)
  • pollIntervalMs: Polling interval in milliseconds (number, optional, default: 1500)

• submit_solution - Submits code for a specific problem and waits until finished (requires authentication)

  • titleSlug: The URL slug/identifier of the problem (string, required)
  • lang: Programming language (string enum, required)
  • typedCode: Source code to submit (string, required)
  • timeoutMs: Polling timeout in milliseconds (number, optional, default: 120000)
  • pollIntervalMs: Polling interval in milliseconds (number, optional, default: 1500)

Notes

• search_notes - Searches for user notes on LeetCode China

  • keyword: Search term to filter notes (string, optional)
  • limit: Maximum number of notes to return (number, optional, default: 10)
  • skip: Number of notes to skip (number, optional, default: 0)
  • orderBy: Sort order for returned notes (enum: "ASCENDING", "DESCENDING", optional, default: "DESCENDING")

• get_note - Retrieves user notes for a specific LeetCode problem

  • questionId: The question ID of the LeetCode problem (string, required)
  • limit: Maximum number of notes to return (number, optional, default: 10)
  • skip: Number of notes to skip (number, optional, default: 0)

• create_note - Creates a new note for a specific LeetCode problem

  • questionId: The question ID of the LeetCode problem (string, required)
  • content: The content of the note, supports markdown format (string, required)
  • summary: An optional short summary or title for the note (string, optional)

• update_note - Updates an existing note with new content or summary

  • noteId: The ID of the note to update (string, required)
  • content: The new content for the note, supports markdown format (string, required)
  • summary: An optional new short summary or title for the note (string, optional)

Solutions

• list_problem_solutions - Retrieves a list of community solutions for a specific problem

  • questionSlug: The URL slug/identifier of the problem (string, required)
  • limit: Maximum number of solutions to return (number, optional, default: 10)
  • skip: Number of solutions to skip (number, optional)
  • userInput: Search term to filter solutions (string, optional)
  • tagSlugs: Array of tag identifiers to filter solutions (string[], optional, default: [])
  • orderBy: Sorting criteria for the returned solutions
    • Global: enum: "HOT", "MOST_RECENT", "MOST_VOTES", optional, default: "HOT"
    • CN: enum: "DEFAULT", "MOST_UPVOTE", "HOT", "NEWEST_TO_OLDEST", "OLDEST_TO_NEWEST", optional, default: "DEFAULT"

• get_problem_solution - Retrieves the complete content of a specific solution

  • topicId: Unique topic ID of the solution (string, required, Global only)
  • slug: Unique slug/identifier of the solution (string, required, CN only)

Available Resources

Resource Name	Global	CN	Auth Required	Description
problem-categories	✅	✅	❌	A list of all problem classification categories
problem-tags	✅	✅	❌	A detailed collection of algorithmic and data structure tags
problem-langs	✅	✅	❌	A complete list of all supported programming languages
problem-detail	✅	✅	❌	Provides details about a specific problem
problem-solution	✅	✅	❌	Provides the complete content of a specific solution

Resource URIs

• problem-categories - A list of all problem classification categories

  • URI: categories://problems/all

• problem-tags - A detailed collection of algorithmic and data structure tags

  • URI: tags://problems/all

• problem-langs - A complete list of all programming languages supported by LeetCode

  • URI: langs://problems/all

• problem-detail - Provides details about a specific LeetCode problem

  • URI: problem://{titleSlug}
  • Parameters:
    • titleSlug: Problem identifier as it appears in the LeetCode URL

• problem-solution - Provides the complete content of a specific solution

  • Global URI: solution://{topicId}
    • Parameters:
      • topicId: Unique topic ID of the solution
  • CN URI: solution://{slug}
    • Parameters:
      • slug: Unique slug/identifier of the solution

Authentication

User-specific data access requires LeetCode session authentication:

1. Log in to LeetCode (Global or China site)
2. Extract LEETCODE_SESSION cookie from browser developer tools
3. Configure server with --session flag or LEETCODE_SESSION environment variable

Response Format

All tools return JSON-formatted responses with the following structure:

{
  "content": [
    {
      "type": "text",
      "text": "JSON_DATA_STRING"
    }
  ]
}

The JSON_DATA_STRING contains either the requested data or an error message for failed requests.

License

This project is licensed under the MIT License.