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polymarket.mjs
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277
polymarket.mjs
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#!/usr/bin/env node
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/**
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* Polymarket CLI - Query prediction market odds
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*
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* Usage:
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* polymarket search <query> - Search for markets by keyword
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* polymarket events [options] - List events with filters
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* polymarket market <slug> - Get market details and current odds
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* polymarket sports - List sports leagues/series
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* polymarket tags - List available categories
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* polymarket price <token_id> - Get current price for a token
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*/
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const GAMMA_API = 'https://gamma-api.polymarket.com';
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const CLOB_API = 'https://clob.polymarket.com';
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async function fetchJSON(url) {
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const res = await fetch(url);
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if (!res.ok) throw new Error(`HTTP ${res.status}: ${res.statusText}`);
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return res.json();
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}
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function parsePrice(pricesStr) {
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try {
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const prices = JSON.parse(pricesStr);
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return prices.map(p => (parseFloat(p) * 100).toFixed(1) + '%');
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} catch {
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return [];
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}
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}
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function parseOutcomes(outcomesStr) {
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try {
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return JSON.parse(outcomesStr);
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} catch {
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return [];
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}
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}
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function formatMarket(market, verbose = false) {
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const outcomes = parseOutcomes(market.outcomes);
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const prices = parsePrice(market.outcomePrices);
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const odds = outcomes.map((o, i) => `${o}: ${prices[i] || '?'}`).join(' | ');
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let out = `📊 ${market.question}\n`;
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out += ` ${odds}\n`;
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out += ` Volume: $${(market.volumeNum || 0).toLocaleString()}`;
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if (market.liquidity) out += ` | Liquidity: $${parseFloat(market.liquidity).toLocaleString()}`;
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if (verbose) {
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out += `\n Slug: ${market.slug}`;
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if (market.endDate) out += `\n Ends: ${market.endDate.split('T')[0]}`;
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}
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return out;
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}
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function formatEvent(event, verbose = false) {
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let out = `\n🎯 ${event.title}\n`;
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if (event.description && verbose) {
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out += ` ${event.description.slice(0, 200)}${event.description.length > 200 ? '...' : ''}\n`;
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}
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out += ` Volume: $${(event.volume || 0).toLocaleString()}`;
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if (event.liquidity) out += ` | Liquidity: $${parseFloat(event.liquidity).toLocaleString()}`;
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out += '\n';
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if (event.markets && event.markets.length > 0) {
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for (const m of event.markets.slice(0, 5)) {
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if (m.active && !m.closed) {
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out += formatMarket(m, verbose) + '\n';
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}
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}
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if (event.markets.length > 5) {
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out += ` ... and ${event.markets.length - 5} more markets\n`;
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}
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}
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return out;
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}
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async function search(query, limit = 10) {
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// Use the public-search endpoint for efficient keyword search
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const url = `${GAMMA_API}/public-search?q=${encodeURIComponent(query)}&limit=50`;
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const data = await fetchJSON(url);
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if (!data.events || data.events.length === 0) {
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console.log(`No markets found for "${query}"`);
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return;
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}
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// Filter to only active, non-closed events
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const matches = data.events.filter(e => e.active && !e.closed).slice(0, limit);
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if (matches.length === 0) {
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console.log(`No active markets found for "${query}"`);
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return;
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}
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console.log(`Found ${matches.length} active events matching "${query}":\n`);
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for (const event of matches) {
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console.log(formatEvent(event, true));
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}
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}
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async function listEvents(options = {}) {
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const params = new URLSearchParams();
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params.set('active', 'true');
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params.set('closed', 'false');
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params.set('limit', options.limit || '20');
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if (options.tag) params.set('tag_slug', options.tag);
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if (options.series) params.set('series_id', options.series);
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if (options.order) params.set('order', options.order);
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const url = `${GAMMA_API}/events?${params}`;
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const events = await fetchJSON(url);
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console.log(`Active events (${events.length}):\n`);
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for (const event of events) {
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console.log(formatEvent(event));
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}
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}
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async function getMarket(slugOrId) {
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const url = `${GAMMA_API}/markets?slug=${encodeURIComponent(slugOrId)}`;
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const markets = await fetchJSON(url);
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if (!markets || markets.length === 0) {
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// Try by ID
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const byIdUrl = `${GAMMA_API}/markets/${slugOrId}`;
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try {
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const market = await fetchJSON(byIdUrl);
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console.log(formatMarket(market, true));
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return;
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} catch {
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console.log(`Market not found: ${slugOrId}`);
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return;
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}
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}
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for (const market of markets) {
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console.log(formatMarket(market, true));
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console.log();
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}
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}
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async function listSports() {
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const url = `${GAMMA_API}/sports`;
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try {
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const sports = await fetchJSON(url);
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console.log('Sports leagues:\n');
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for (const sport of sports.slice(0, 30)) {
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console.log(` ${sport.label || sport.title} (series_id: ${sport.id})`);
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}
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} catch (e) {
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console.log('Sports endpoint not available or empty');
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}
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}
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async function listTags(limit = 50) {
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const url = `${GAMMA_API}/tags?limit=${limit}`;
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const tags = await fetchJSON(url);
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console.log('Available categories:\n');
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for (const tag of tags) {
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console.log(` ${tag.label} (slug: ${tag.slug})`);
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}
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}
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async function getPrice(tokenId, side = 'buy') {
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const url = `${CLOB_API}/price?token_id=${tokenId}&side=${side}`;
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try {
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const data = await fetchJSON(url);
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console.log(`Price (${side}): ${(parseFloat(data.price) * 100).toFixed(1)}%`);
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} catch (e) {
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console.log(`Error fetching price: ${e.message}`);
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}
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}
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async function getOrderbook(tokenId) {
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const url = `${CLOB_API}/book?token_id=${tokenId}`;
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try {
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const data = await fetchJSON(url);
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console.log('Orderbook:');
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console.log(' Bids:', data.bids?.slice(0, 5).map(b => `${(parseFloat(b.price)*100).toFixed(1)}% x $${b.size}`).join(', ') || 'none');
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console.log(' Asks:', data.asks?.slice(0, 5).map(a => `${(parseFloat(a.price)*100).toFixed(1)}% x $${a.size}`).join(', ') || 'none');
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} catch (e) {
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console.log(`Error fetching orderbook: ${e.message}`);
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}
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}
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// Main
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const [,, cmd, ...args] = process.argv;
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(async () => {
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try {
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switch (cmd) {
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case 'search':
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case 's':
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if (!args[0]) {
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console.log('Usage: polymarket search <query>');
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process.exit(1);
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}
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await search(args.join(' '), parseInt(args.find(a => a.startsWith('--limit='))?.split('=')[1]) || 10);
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break;
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case 'events':
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case 'e':
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const evtOpts = {};
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for (const arg of args) {
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if (arg.startsWith('--tag=')) evtOpts.tag = arg.split('=')[1];
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if (arg.startsWith('--series=')) evtOpts.series = arg.split('=')[1];
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if (arg.startsWith('--limit=')) evtOpts.limit = arg.split('=')[1];
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if (arg.startsWith('--order=')) evtOpts.order = arg.split('=')[1];
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}
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await listEvents(evtOpts);
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break;
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case 'market':
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case 'm':
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if (!args[0]) {
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console.log('Usage: polymarket market <slug>');
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process.exit(1);
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}
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await getMarket(args[0]);
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break;
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case 'sports':
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await listSports();
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break;
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case 'tags':
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case 't':
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await listTags(parseInt(args[0]) || 50);
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break;
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case 'price':
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case 'p':
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if (!args[0]) {
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console.log('Usage: polymarket price <token_id> [buy|sell]');
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process.exit(1);
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}
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await getPrice(args[0], args[1] || 'buy');
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break;
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case 'book':
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case 'b':
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if (!args[0]) {
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console.log('Usage: polymarket book <token_id>');
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process.exit(1);
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}
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await getOrderbook(args[0]);
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break;
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default:
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console.log(`Polymarket CLI - Query prediction market odds
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Commands:
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search <query> Search markets by keyword
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events [options] List active events
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--tag=<slug> Filter by category (crypto, politics, sports, etc.)
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--limit=<n> Max results (default: 20)
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market <slug> Get market details and current odds
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sports List sports leagues
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tags List available categories
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price <token_id> Get current price for a token
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book <token_id> Get orderbook for a token
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Examples:
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polymarket search "super bowl"
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polymarket search "bitcoin 100k"
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polymarket events --tag=crypto --limit=10
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polymarket market will-bitcoin-reach-100k
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`);
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}
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} catch (e) {
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console.error('Error:', e.message);
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process.exit(1);
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}
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})();
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