KREX - A Lightweight Python Package for Low-Latency and Cross-Exchange Trading

A high-performance and lightweight Python library for interacting with cryptocurrency exchanges. KREX offers full synchronous and asynchronous support across major exchanges, designed for speed, modularity, and ease of use.

📦 Installation

pip install krex

🚀 Quick Start

Synchronous Usage

import krex
import os

# Initialize client for any supported exchange
client = krex.binance(
    api_key="your_api_key",
    api_secret="your_api_secret"
)

# Get account balance
balance = client.get_account_balance()
print(balance)

# Get market data
klines = client.get_klines(symbol="BTCUSDT", interval="1h")
print(klines)

Asynchronous Usage

import asyncio
import krex.async_support as krex
import os

async def main():
    # Initialize async client
    client = await krex.binance(
        api_key="your_api_key",
        api_secret="your_api_secret"
    )

    try:
        # Get account balance
        balance = await client.get_account_balance()
        print(balance)

        # Get market data
        klines = await client.get_klines(symbol="BTCUSDT", interval="1h")
        print(klines)

    finally:
        await client.close()

if __name__ == "__main__":
    asyncio.run(main())

📚 Supported Exchanges

Exchange	Sync Support	Async Support
Binance	✅	✅
Bybit	✅	✅
OKX	✅	✅
BitMart	✅	✅
Gate.io	✅	✅
Hyperliquid	✅	✅
BitMEX	✅	✅
BingX	Developing	Developing
AscendEX	Developing	Developing
KuCoin	Developing	Developing

🔍 Key Features

• 📘 Product Table Manager for unifying trading instruments in different exchanges
• 🔁 Sync & Async API clients with identical interfaces
• ⚡ Optimized for low-latency, high-frequency trading

What is Product Table Manager(ptm)?

Ptm is a utility that standardizes and unifies trading instrument metadata across different exchanges, making cross-exchange strategy development easier.

It is a table that contains the following columns:

Column	Description
exchange	The exchange name
product_symbol	The symbol we use to identify the product, it will be the same in different exchanges. For example, BTC-USDT-SWAP is the same product in Binance and Bybit, which named BTCUSDT in Binance and BTC-USDT-SWAP in OKX.
exchange_symbol	The symbol that the exchange will actually used
product_type	The type we will use, e.g. spot, inverse, swap, futures
exchange_type	The type the exchange will actually used, e.g. linear, INVERSE, perp... different exchanges have different types, pretty annoying...
base_symbol	The base symbol, e.g. BTC
quote_symbol	The quote symbol, e.g. USDT
price_precision	The price precision, e.g. 0.000001
size_precision	The size precision, e.g. 0.000001
min_size	The minimum size, e.g. 0.000001
min_notional	The minimum notional, e.g. 0.000001
multiplier	The multiplier of the product, such symbol like 1000BONKUSDT in Bybit will need to be multiplied by 1000 to get the actual size, if you are trading across spot and swap, you will need this
size_per_contract	The size per contract. Sometimes 1 contract is not the same as 1 unit in exchanges like OKX.

How to use Product Table Manager?

In most cases, we have handled the case, but if you have any specific use cases, you can use the ptm to get the information you want.

import krex

binance = krex.binance()

btcusdt_product_symbol = binance.ptm.get_product_symbol(
    exchange="binance",
    exchange_symbol="BTCUSDT",
    product_type="swap",
)

print(btcusdt_product_symbol)

🤝 Contributing

We welcome contributions! Please see our Contributing Guide for details.

Development Setup

# Clone the repository
git clone https://github.com/kairosresearchio/krex.git
cd krex

# We use `uv` to manage the project, you can install it with `pip install uv`
# Create a virtual environment
uv venv

# Install the dependencies
uv sync

Contributors

📄 License

This project is licensed under the MIT License.

🆘 Support

• Issues: Report bugs and request features on GitHub Issues

📜 Disclaimer

Cryptocurrency trading involves significant risk. This library is provided as-is without any warranty. Users are responsible for their own trading decisions and risk management.