The ccxt for prediction markets. A unified API for accessing prediction market data across multiple exchanges.

Different prediction market platforms have different APIs, data formats, and conventions. pmxt provides a single, consistent interface to work with all of them.

Get the current price for any market in seconds:

import pmxt from 'pmxtjs';

async function main() {
  const poly = new pmxt.Polymarket();
  const [market] = await poly.searchMarkets('Trump');

  console.log(`${market.title} - ${market.outcomes[0].label}: ${market.outcomes[0].price * 100}%`);
}

main();

npm install pmxtjs

pmxt is currently CommonJS-only. If you're using "type": "module" in your package.json, use the default import:

import pmxt from 'pmxtjs';
const poly = new pmxt.Polymarket();

Named exports like import { Polymarket } from 'pmxtjs' will not work in ESM projects. See the API Reference for more details.

• Polymarket
• Kalshi

pmxt supports trading functionality (placing and cancelling orders).

To trade, you must provide your private credentials.

• Polymarket: Requires your Polygon Private Key. View Setup Guide
• Kalshi: Requires API Key & Private Key.

import pmxt from 'pmxtjs';

const exchange = new pmxt.Polymarket({
    privateKey: process.env.POLYMARKET_PRIVATE_KEY
});

// Check Balance
const balance = await exchange.fetchBalance();
console.log('Balance:', balance);

// Place an Order
const order = await exchange.createOrder({
    marketId: 'market-123',
    outcomeId: 'token-id-456',
    side: 'buy',
    type: 'limit',
    price: 0.50,
    amount: 100
});
console.log('Order:', order);

See the API Reference for detailed documentation and more examples.

Check out the examples directory for more use cases:

• Market search
• Order book data
• Historical prices
• Event price tracking
• Recent trades