leetcode-problem-fetcher

A specialized skill for fetching and parsing LeetCode problems with complete metadata, suitable for competitive programming practice, interview preparation, and algorithm learning workflows.

Purpose

Extract comprehensive problem data from LeetCode including:

•Problem statements and descriptions
•Input/output constraints and formats
•Test cases and hidden constraints
•Problem difficulty, tags, and acceptance rate
•Related problems and pattern tags
•Hints and solution approaches

Capabilities

Core Features

•
Problem Retrieval
- •Fetch problems by title slug (URL-friendly name)
- •Retrieve daily challenge problems
- •Search problems by category, tags, difficulty, or keywords
- •Access premium problem alternatives when available
•
Metadata Extraction
- •Difficulty level (Easy, Medium, Hard)
- •Acceptance rate and submission statistics
- •Problem tags and categories
- •Related problems and similar questions
- •Company tags (when available)
•
Content Parsing
- •Problem description in markdown format
- •Input/output examples with explanations
- •Constraints and edge cases
- •Follow-up questions and optimizations
- •Code templates for multiple languages
•
User Data Access
- •User profile and statistics
- •Contest ranking and history
- •Submission history and solutions
- •Progress tracking across problem sets

Integration Options

MCP Server (Recommended)

bash

# Install LeetCode MCP Server by jinzcdev
claude mcp add-json "leetcode" '{"type":"stdio","command":"npx","args":["-y","@jinzcdev/leetcode-mcp-server","--site","global"]}'

Available MCP Tools:

•get_daily_challenge - Fetch daily LeetCode challenge
•get_problem - Retrieve problem by titleSlug
•search_problems - Filter by category, tags, difficulty, keywords
•get_user_profile - Access user data
•get_user_contest_ranking - Track contest performance

Direct API Integration

javascript

// GraphQL endpoint for LeetCode
const LEETCODE_GRAPHQL = 'https://leetcode.com/graphql';

// Query for problem details
const problemQuery = `
  query getProblem($titleSlug: String!) {
    question(titleSlug: $titleSlug) {
      questionId
      title
      titleSlug
      content
      difficulty
      topicTags { name slug }
      hints
      sampleTestCase
      codeSnippets { lang code }
      stats
    }
  }
`;

Browser Extension

Competitive Companion - Parses problems from LeetCode and 115+ other online judges:

•Chrome: competitive-companion
•Firefox: competitive-companion

Usage

Fetch a Problem

bash

# Using MCP Server
leetcode get_problem --titleSlug "two-sum"

# Output includes:
# - Problem title and description
# - Difficulty and acceptance rate
# - Topic tags
# - Examples and constraints
# - Code templates

Search Problems

bash

# Search by difficulty and tags
leetcode search_problems --difficulty MEDIUM --tags "dynamic-programming,array"

# Search by keyword
leetcode search_problems --keyword "substring"

Get Daily Challenge

bash

# Fetch today's daily challenge
leetcode get_daily_challenge

Output Schema

json

{
  "problem": {
    "id": "string",
    "title": "string",
    "titleSlug": "string",
    "difficulty": "Easy|Medium|Hard",
    "acceptanceRate": "number",
    "description": "string (markdown)",
    "constraints": ["string"],
    "examples": [
      {
        "input": "string",
        "output": "string",
        "explanation": "string"
      }
    ],
    "hints": ["string"],
    "topicTags": ["string"],
    "similarQuestions": ["string"],
    "codeTemplates": {
      "python3": "string",
      "cpp": "string",
      "java": "string"
    }
  },
  "metadata": {
    "fetchedAt": "ISO8601 timestamp",
    "source": "leetcode.com|leetcode.cn"
  }
}

Integration with Processes

This skill enhances the following processes:

•leetcode-problem-solving - Core problem-solving workflow
•pattern-recognition - Identifying algorithmic patterns
•faang-interview-prep - FAANG interview preparation

References

Error Handling

Error	Cause	Resolution
`PROBLEM_NOT_FOUND`	Invalid titleSlug	Verify problem URL or slug
`RATE_LIMITED`	Too many requests	Implement exponential backoff
`AUTH_REQUIRED`	Premium problem	Use alternative or authenticate
`NETWORK_ERROR`	Connection failed	Check network, retry with backoff

Best Practices

•Caching: Cache problem data to reduce API calls
•Rate Limiting: Respect LeetCode's rate limits (use delays between requests)
•Error Handling: Gracefully handle premium/locked problems
•Offline Mode: Store fetched problems for offline practice
•Data Freshness: Re-fetch periodically for updated statistics