How to Use League of Legends Esports API: Complete Developer Guide 2025

curl -H "x-api-key: cito_live_your_key" \  https://api.citoapi.com/api/v1/lol/leagues

mkdir lol-esports-trackercd lol-esports-trackernpm init -ynpm install axios dotenv

CITO_API_KEY=your_api_key_here

// api.jsconst axios = require('axios');require('dotenv').config(); const lolAPI = axios.create({  baseURL: 'https://api.citoapi.com/api/v1/lol',  headers: {    'x-api-key': process.env.CITO_API_KEY  }}); module.exports = lolAPI;

const api = require('./api'); async function getStandings(leagueId) {  const { data } = await api.get(`/leagues/${leagueId}/standings`);  return data;} // Get LCS standingsasync function main() {  const standings = await getStandings('lcs');   console.log('LCS Standings:\n');  standings.data.forEach((team, i) => {    console.log(`${(i + 1).toString().padStart(2)}. ${team.name.padEnd(20)} ${team.wins}W - ${team.losses}L`);  });} main();

LCS Standings:  1. Cloud9              14W - 4L 2. Team Liquid          13W - 5L 3. FlyQuest             12W - 6L ...

async function getPlayerStats(playerId) {  const { data } = await api.get(`/players/${playerId}/stats`);  return data;} async function showPlayerCard(playerId) {  const stats = await getPlayerStats(playerId);  const player = stats.data;   console.log(`${player.name} (${player.team})`);  console.log(`Role: ${player.role}`);  console.log(`KDA: ${player.kda}`);  console.log(`CS/min: ${player.csPerMin}`);  console.log(`DPM: ${player.damagePerMin}`);  console.log(`Vision: ${player.visionScore}`);  console.log(`Win Rate: ${player.winRate}%`);} showPlayerCard('faker');

async function getLiveMatches() {  const { data } = await api.get('/live');  return data;} async function showLive() {  const live = await getLiveMatches();   if (live.data.length === 0) {    console.log('No live matches right now.');    return;  }   live.data.forEach(match => {    console.log(`[${match.league}] ${match.team1.name} vs ${match.team2.name}`);    console.log(`  Score: ${match.team1.score} - ${match.team2.score}`);    console.log(`  Game ${match.currentGame} | ${match.status}`);  });} // Poll every 30 seconds during broadcastsetInterval(showLive, 30000);

class LoLTracker {  constructor(api) {    this.api = api;  }   async getTeamProfile(slug) {    const [team, roster, stats] = await Promise.all([      this.api.get(`/teams/${slug}`),      this.api.get(`/teams/${slug}/roster`),      this.api.get(`/teams/${slug}/stats`)    ]);     return {      info: team.data,      roster: roster.data,      stats: stats.data    };  }   async compareTeams(slug1, slug2) {    const [t1, t2, h2h] = await Promise.all([      this.getTeamProfile(slug1),      this.getTeamProfile(slug2),      this.api.get(`/teams/${slug1}/h2h/${slug2}`)    ]);     return { team1: t1, team2: t2, headToHead: h2h.data };  }   async getLeagueOverview(leagueId) {    const [standings, schedule, teams] = await Promise.all([      this.api.get(`/leagues/${leagueId}/standings`),      this.api.get(`/leagues/${leagueId}/schedule`),      this.api.get(`/leagues/${leagueId}/teams`)    ]);     return {      standings: standings.data,      upcomingMatches: schedule.data,      teams: teams.data    };  }   async getTournamentBracket(tournamentId) {    const { data } = await this.api.get(`/tournaments/${tournamentId}/bracket`);    return data;  }} // Usageconst tracker = new LoLTracker(api);const lcs = await tracker.getLeagueOverview('lcs');console.log(JSON.stringify(lcs, null, 2));

// Get Worlds bracketconst bracket = await api.get('/tournaments/worlds-2025/bracket');console.log('Worlds 2025 Bracket:', bracket.data); // Get tournament stats and MVPconst stats = await api.get('/tournaments/worlds-2025/stats');const mvp = await api.get('/tournaments/worlds-2025/mvp');console.log('Tournament MVP:', mvp.data); // Historical Worlds dataconst history = await api.get('/history/worlds');history.data.forEach(year => {  console.log(`${year.year}: ${year.winner} defeated ${year.runnerUp}`);});

// Current meta tier listconst meta = await api.get('/champions/meta');meta.data.forEach(champ => {  console.log(`${champ.name}: ${champ.pickRate}% pick, ${champ.banRate}% ban, ${champ.winRate}% WR`);}); // How did the latest patch change the meta?const patchImpact = await api.get('/champions/patches/14.10');console.log('Biggest winners:', patchImpact.data.winners);console.log('Biggest losers:', patchImpact.data.losers);