Open Source .NET API Wrapper for OKX V5 REST and Websocket Integration

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Developers seeking seamless integration with the OKX exchange now have a powerful, open-source solution at their fingertips: a fully featured .NET API wrapper designed for the OKX V5 REST and Websocket APIs. This robust library simplifies interaction with one of the world’s leading cryptocurrency trading platforms, enabling developers to build scalable, high-performance applications for spot, futures, margin, and options trading.

Built on top of the widely respected CryptoExchange.Net framework, this wrapper delivers clean, readable, and type-safe access to all endpoints provided by the official OKX API documentation. Whether you're building automated trading bots, portfolio trackers, or institutional-grade analytics tools, this library streamlines development with intuitive object models and comprehensive feature coverage.

👉 Discover how to integrate advanced trading capabilities into your .NET application today.

Why Use This .NET Wrapper?

The OKX .NET API client abstracts complex HTTP and WebSocket communications into simple method calls and event-driven handlers. It supports both synchronous and asynchronous operations, making it ideal for real-time trading systems and background services alike.

Key benefits include:

This project is actively maintained and encourages community contributions. If you encounter issues or need new features, the developer welcomes feedback through GitHub issues.

Migration Advisory: Transition to OKX.Api

A critical update for existing users: migration to the newer OKX.Api package is strongly recommended. The original OKEx.Net library may encounter compatibility issues derived from its dependency on older versions of CryptoExchange.Net. The updated OKX.Api offers improved stability, enhanced performance, and ongoing feature updates.

You can access the new repository and NuGet package here:

Continuing with the legacy OKEx.Net may result in unexpected errors or deprecated functionality.

Installation via NuGet

Getting started is straightforward using the NuGet Package Manager. Install the library directly into your .NET project with a single command:

Install-Package OKEx.Net

In Visual Studio, you can either:

  1. Use the Package Manager UI: Right-click your solution > Manage NuGet Packages > Browse > Search "OKEx.Net" > Install.
  2. Use the Package Manager Console: Run Install-Package OKEx.Net after selecting your target project.

Once installed, add the namespace to your code:

using Okex.Net;

Core Clients: REST and WebSocket

The library provides two primary clients:

Both classes implement IDisposable, so they should be used within using statements or properly disposed to avoid resource leaks.

Example: Initializing Clients

using var restClient = new OkexClient();
using var socketClient = new OkexSocketClient();

For authenticated endpoints, set your credentials:

restClient.SetApiCredentials("your-api-key", "your-secret", "your-passphrase");

REST API Usage Examples

Public Market Data

Retrieve real-time market information without authentication:

var instruments = restClient.GetInstruments(OkexInstrumentType.Spot);
var ticker = restClient.GetTicker("BTC-USDT");
var orderBook = restClient.GetOrderBook("BTC-USDT", 40);
var candles = restClient.GetCandlesticks("BTC-USDT", OkexPeriod.OneHour);

Account & Trading Operations (Authenticated)

Access private data and execute trades:

var balance = restClient.GetAccountBalance();
var positions = restClient.GetAccountPositions();
var orderResult = restClient.PlaceOrder(
    "BTC-USDT",
    OkexTradeMode.Cash,
    OkexOrderSide.Buy,
    OkexPositionSide.Long,
    OkexOrderType.MarketOrder,
    0.1m
);

Funding & Withdrawals

Manage deposits, withdrawals, and transfers:

var fundingBalance = restClient.GetFundingBalance();
var withdrawal = restClient.Withdraw(
    "USDT",
    100.0m,
    OkexWithdrawalDestination.DigitalCurrencyAddress,
    "your-wallet-address",
    "your-password",
    1.0m,
    "USDT-TRC20"
);

👉 Start building intelligent trading systems with full API access.

WebSocket Real-Time Feeds

For low-latency applications, subscribe to live data streams:

var socket = new OkexSocketClient();
socket.SubscribeToTickers("BTC-USDT", data =>
{
    Console.WriteLine($"Price: {data.Last}");
});
socket.SubscribeToOrderBook("BTC-USDT", OkexOrderBookType.OrderBook, data =>
{
    Console.WriteLine($"Bid: {data.Bids.First().Price}, Ask: {data.Asks.First().Price}");
});

Private feeds (requires authentication) include:

Core Keywords for SEO Optimization

This guide integrates key terms that align with developer search intent:

These keywords are naturally embedded throughout to enhance visibility without compromising readability.

Frequently Asked Questions

Q: Is this library officially supported by OKX?
A: No, this is a community-developed open-source wrapper. While it interfaces with the official OKX V5 API, it is not maintained by OKX.

Q: Can I use this for high-frequency trading?
A: Yes, the WebSocket client is optimized for real-time data delivery and can support HFT strategies when combined with efficient logic.

Q: What version of .NET does it support?
A: The library targets .NET Standard 2.0+, making it compatible with .NET Core 2.0+, .NET 5+, and .NET Framework 4.6.1+.

Q: How do I handle rate limits?
A: The underlying CryptoExchange.Net library automatically manages rate limiting based on OKX API rules.

Q: Where can I find detailed documentation?
A: Refer to the OKX API docs for endpoint specifications and the GitHub repository for code examples.

Q: Is there a testnet environment available?
A: Yes, you can configure the client to use OKX’s demo trading environment for testing purposes.

Final Thoughts

The OKX .NET API wrapper is an essential tool for C# developers entering the crypto space. Its clean architecture, extensive endpoint coverage, and real-time capabilities make it ideal for building professional trading applications.

While migration to OKX.Api is advised for long-term stability, this library remains a solid foundation for understanding API integration patterns with major exchanges.

👉 Unlock next-generation trading automation with seamless OKX connectivity.