MAINNET DATABETA

// paper_trading++TEST YOUR ALGO
ON REAL DATA

Paper trade on live mainnet data from Hyperliquid. Real order books, real spreads, real slippage simulation. Validate your strategy before risking real capital.

Real Prices
Real Order Books
Real Slippage
strategy_execution.py
importpaperexchangeaspx
# Just change the base URL - that's it!
BASE_URL ="https://api.paperx.co"
# Use your PaperExchange API key
headers = {"X-API-Key":"pe_your_key"}
# Same API format as Hyperliquid
response = requests.post(
BASE_URL +"/exchange",
headers=headers,
json={order_data}
)
> Order filled with realistic slippage
API Compatible
100%

01. WHY PAPEREXCHANGE?

Hyperliquid testnet uses fake data. Your backtest results won't match production. We mirror the real mainnet so your strategy behaves exactly as it would live.

Standard Paper Trading

  • Testnet prices don't match mainnet
  • Synthetic order books with fake liquidity
  • No realistic slippage or spread simulation
  • Strategies that "work" fail with real money
RECOMMENDED

paperx.co

  • Live mainnet prices & order books
  • Realistic slippage based on actual depth
  • Accurate fees (0.015% maker / 0.045% taker)
  • 100% Hyperliquid API compatible
market_maker.js
// Initialize the PaperExchange WebSocket
constws =newWebSocket('wss://api.paperx.co/v1/stream');

// Subscribe to Hyperliquid L2 updates
ws.onopen = () => {
ws.send(JSON.stringify({
op:'subscribe',
channel:'l2Book',
market:'HYPE-USD'
}));
};

// Handle real-time updates
ws.onmessage = (event) => {
constbook = JSON.parse(event.data);
console.log('Spread:', book.asks[0] - book.bids[0]);
};

02. DROP-IN REPLACEMENT

Just change your base URL from api.hyperliquid.xyz to api.paperx.co. That's it. Same API format, same responses.

Same API Format

Use your existing Hyperliquid code. Just swap the endpoint.

WebSocket Streams

Real-time L2 order book updates, trades, and account data.

All Order Types

Market, Limit, Stop Loss, Take Profit - all supported.

03. HOW IT WORKS

Get started in minutes. No complex setup required.

1

Create Account

Sign up with just an email. No KYC, no personal info required. Get a 3-day free trial to test everything.

2

Generate API Key

Create an API key from your dashboard. Use it to authenticate all your trading requests.

3

Start Trading

Point your existing code to our API. Same format as Hyperliquid - your strategy works instantly.

04. PRO TRADING FEATURES

Everything you need to build, test, and validate your trading strategies.

Real-Time WebSocket

Live price updates, order book changes, and trade notifications. Same format as Hyperliquid WebSocket API.

Strategy Backtesting

Test your strategies on historical data with 100% accuracy. Real OHLCV data, realistic execution, comprehensive metrics.

Advanced Orders

Take Profit, Stop Loss, TWAP, and trigger orders. All order types execute automatically in the background.

8-Hour Funding

Real Hyperliquid funding rates applied every 8 hours. Accurate simulation of perpetual contract costs.

Liquidation Simulation

Accurate liquidation price calculation using Hyperliquid's formula. Know your risk before going live.

Historical Data

Sync and store OHLCV data for any coin and timeframe. 1m to 1W candles with gap detection.

05. SUPPORTED EXCHANGES

H

Hyperliquid

DEXLIVE
B

Binance

CEXCOMING SOON
B

Bybit

CEXCOMING SOON
d

dYdX

DEXPLANNED

Ready to validate your strategy?

Stop deploying untested code to mainnet. Paper trade on real data first. 3-day free trial. Crypto payments only.