The ccxt for prediction markets. A unified API for accessing prediction market data across multiple exchanges.
NOTE: pmxt is an open-source infrastructure tool. It has no native token, coin, or investment vehicle.
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Different prediction market platforms have different APIs, data formats, and conventions. pmxt provides a single, consistent interface to work with all of them.
Polymarket
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Kalshi
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Baozi
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Myriad
Ensure that Node.js is installed and the node command is available on your PATH.
pip install pmxtnpm install pmxtjsPrediction markets are structured in a hierarchy to group related information.
- Event: The broad topic (e.g., "Who will Trump nominate as Fed Chair?")
- Market: A specific tradeable question (e.g., "Will Trump nominate Kevin Warsh as the next Fed Chair?")
- Outcome: The actual share you buy (e.g., "Yes" or "No")
import pmxt
api = pmxt.Exchange()
# 1. Search for the broad Event
events = api.fetch_events(query='Who will Trump nominate as Fed Chair?')
fed_event = events[0]
# 2. Find the specific Market within that event
warsh = fed_event.markets.match('Kevin Warsh')
print(f"Price: {warsh.yes.price}")import pmxt from 'pmxtjs';
const api = new pmxt.Exchange();
// 1. Search for the broad Event
const events = await api.fetchEvents({ query: 'Who will Trump nominate as Fed Chair?' });
const fedEvent = events[0];
// 2. Find the specific Market within that event
const warsh = fedEvent.markets.match('Kevin Warsh');
console.log(`Price: ${warsh.yes?.price}`);pmxt supports unified trading across exchanges.
To trade, you must provide your private credentials during initialization.
exchange = pmxt.Polymarket(
private_key=os.getenv('POLYMARKET_PRIVATE_KEY'),
proxy_address=os.getenv('POLYMARKET_PROXY_ADDRESS'), # Optional: For proxy trading
signature_type='gnosis-safe' # Default
)exchange = pmxt.Kalshi(
api_key=os.getenv('KALSHI_API_KEY'),
private_key=os.getenv('KALSHI_PRIVATE_KEY') # RSA Private Key
)exchange = pmxt.Limitless(
api_key=os.getenv('LIMITLESS_API_KEY'),
private_key=os.getenv('LIMITLESS_PRIVATE_KEY') # For order signing (EIP-712)
)import pmxt
import os
# Initialize with credentials (e.g., Polymarket)
exchange = pmxt.Polymarket(
private_key=os.getenv('POLYMARKET_PRIVATE_KEY'),
proxy_address=os.getenv('POLYMARKET_PROXY_ADDRESS')
)
# 1. Check Balance
balance = exchange.fetch_balance()
print(f"Available balance: {balance[0].available}")
# 2. Fetch markets
markets = exchange.fetch_markets(query='Trump')
# 3. Place an Order (using outcome shorthand)
order = exchange.create_order(
outcome=markets[0].yes,
side='buy',
type='limit',
price=0.33,
amount=100
)
print(f"Order Status: {order.status}")See the API Reference for detailed documentation and more examples.
Check out the directory for more use cases:
