Node.js & TypeScript OKX API & WebSocket SDK: Complete Developer Guide

Overview

The OKX API SDK provides a powerful toolkit for developers to integrate with OKX's trading platform programmatically. This comprehensive guide covers installation, usage, and best practices for both REST and WebSocket interfaces.

Key Features

Full API Integration: Supports all OKX APIs including v5 endpoints
TypeScript Support: Built with TypeScript and includes type declarations
Robust WebSocket Implementation:
- Automatic reconnection
- Heartbeat monitoring
- Resubscription workflows
Browser Compatibility: Works in frontend applications via webpack
Extensive Testing: Over 100 end-to-end tests validate functionality

👉 Get started with OKX API integration

Installation

To install the package:

npm install okx-api

REST Client Usage

Initialization

import { RestClient } from 'okx-api';

const client = new RestClient({
  apiKey: 'your_api_key',
  apiSecret: 'your_api_secret',
  apiPass: 'your_api_passphrase'
});

Example: Placing Orders

async function tradeExample() {
  try {
    // Get account balance
    const balances = await client.getBalance();
    
    // Place buy order
    const buyOrder = await client.submitOrder({
      instId: 'BTC-USDT',
      ordType: 'market',
      side: 'buy',
      sz: '0.1',
      tdMode: 'cash'
    });
    
    // Place sell order
    const sellOrder = await client.submitOrder({
      instId: 'BTC-USDT',
      ordType: 'market',
      side: 'sell',
      sz: '0.1',
      tdMode: 'cash'
    });
  } catch (error) {
    console.error('Trade error:', error);
  }
}

WebSocket Client

Public Channels

Subscribe to market data:

import { WebsocketClient } from 'okx-api';

const wsClient = new WebsocketClient();

wsClient.subscribe({
  channel: 'tickers',
  instId: 'BTC-USDT'
});

wsClient.on('update', (data) => {
  console.log('Market update:', data);
});

Private Channels

Account updates require authentication:

const privateWsClient = new WebsocketClient({
  apiKey: 'your_api_key',
  apiSecret: 'your_api_secret',
  apiPass: 'your_api_passphrase'
});

privateWsClient.subscribe({
  channel: 'account',
  ccy: 'BTC'
});

👉 Advanced WebSocket configuration options

Browser Usage

Webpack Configuration

For frontend applications:

Install required polyfills:

npm install crypto-browserify stream-browserify

Add to tsconfig.json:

{
  "compilerOptions": {
 "paths": {
   "crypto": ["node_modules/crypto-browserify"],
   "stream": ["node_modules/stream-browserify"]
 }
  }
}

Add global declaration:
```
(window as any).global = window;
```

Documentation & Resources

Resource	Description
OKX API Docs	Official API documentation
TypeDoc Reference	Generated SDK documentation
GitHub Repo	Source code and issues

FAQ

How do I handle API rate limits?

The SDK automatically handles rate limits by queuing requests. For optimal performance, implement your own request pacing based on your account's rate limit tier.

Can I use this SDK for algorithmic trading?

Yes, the SDK provides all necessary functionality for algorithmic trading strategies, including real-time market data and order execution capabilities.

What's the difference between REST and WebSocket APIs?

The REST API is request-response based, while WebSockets provide real-time streaming data. Use WebSockets for time-sensitive data and REST for occasional requests.

How do I troubleshoot connection issues?

Check your API credentials first. For WebSocket issues, enable debug logging:

const client = new WebsocketClient({
  apiKey: 'your_key',
  debug: true
});

Related Projects

Bybit API Node.js SDK
Binance Node.js SDK
Gate.io API Node.js SDK
KuCoin API Node.js SDK

Contribution Guidelines

We welcome contributions through GitHub pull requests. Please ensure all changes are accompanied by appropriate tests.

For supporting the project's development, consider:

Starring the GitHub repository
Sponsoring the maintainer
Reporting issues with detailed reproduction steps

Conclusion

The OKX API SDK provides a robust foundation for building trading applications and integrations. With its comprehensive feature set and TypeScript support, developers can quickly build reliable systems that interact with OKX's trading platform.

Remember to follow OKX's API guidelines and implement proper error handling in your production applications.