AtCoder API

An unofficial JavaScript/TypeScript client for fetching contest and user data from AtCoder.

Features

• Fetch upcoming and recent contests
• Get detailed user profiles and statistics
• Retrieve user contest participation history
• Built-in rate limiting to avoid server overload
• Caching for better performance
• Full TypeScript support

Installation

npm install @qatadaazzeh/atcoder-api

Usage

Fetching Contests

import { fetchUpcomingContests, fetchRecentContests } from '@qatadaazzeh/atcoder-api';

// Get upcoming contests
const upcoming = await fetchUpcomingContests();
console.log(`Found ${upcoming.length} upcoming contests`);

// Get recent contests
const recent = await fetchRecentContests();
console.log(`Found ${recent.length} recent contests`);

Getting User Information

import { fetchUserInfo } from '@qatadaazzeh/atcoder-api';

// Get user profile
const user = await fetchUserInfo('tourist');
console.log(`${user.userName} has a rating of ${user.userRating}`);

// Access contest history
console.log(`Participated in ${user.userContests.length} contests`);

Getting User's Contest History

import { fetchUserContestList } from '@qatadaazzeh/atcoder-api';

// Get contest participation history for a user
const contestHistory = await fetchUserContestList('tourist');

// Find contests where the user's performance was above 3000
const highPerformance = contestHistory.filter(c => c.userPerformance > 3000);
console.log(`${highPerformance.length} contests with performance > 3000`);

API Reference

Contest Functions

• fetchContestList(type?: 'upcoming' | 'recent'): Fetch a list of contests
• fetchUpcomingContests(): Fetch upcoming contests
• fetchRecentContests(): Fetch recent contests

User Functions

• fetchUserInfo(userId: string): Get detailed user information
• fetchUserContestList(userId: string): Get user's contest participation history

Types

The library exports the following TypeScript types:

• Contest: Contest information
• User: User profile information
• UserContest: User's contest participation details

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

MIT