---
title: "Siebly (@siebly) | Hashnode"
description: "Siebly (@siebly) writes on Hashnode. Read their latest articles and follow their work."
url: "https://hashnode.com/@siebly"
---

@siebly

# Siebly

@siebly · Joined November 2026

### [Bitget books50 goes incremental on 1 December: keeping a local order book in Node.js](https://siebly.hashnode.dev/bitget-books50-goes-incremental-on-1-december-keeping-a-local-order-book-in-node-js?utm_source=hashnode&utm_medium=feed)

What changes on the 50-level depth channel, and a small TypeScript-friendly handler that works before and after the switch

4 min read · [siebly.hashnode.dev](https://siebly.hashnode.dev/bitget-books50-goes-incremental-on-1-december-keeping-a-local-order-book-in-node-js?utm_source=hashnode&utm_medium=feed)

[1d ago](https://hashnode.com/posts/bitget-books50-goes-incremental-on-1-december-keeping-a-local-order-book-in-node-js/6af301d64ef8af572d2c6ed2)

### [KuCoin API JavaScript tutorial for Node.js: REST and WebSocket](https://siebly.hashnode.dev/kucoin-api-javascript-tutorial-for-node-js-rest-and-websocket?utm_source=hashnode&utm_medium=feed)

Public and private REST calls, Classic WebSocket streams and a safe test order with kucoin-api

5 min read · [siebly.hashnode.dev](https://siebly.hashnode.dev/kucoin-api-javascript-tutorial-for-node-js-rest-and-websocket?utm_source=hashnode&utm_medium=feed)

[2d ago](https://hashnode.com/posts/kucoin-api-javascript-tutorial-for-node-js-rest-and-websocket/6af2013b7003f418a735040d)

### [Hyperliquid JavaScript SDK quickstart for Node.js and TypeScript](https://siebly.hashnode.dev/hyperliquid-javascript-sdk-quickstart-for-node-js-and-typescript?utm_source=hashnode&utm_medium=feed)

Install @siebly/hyperliquid-api, read public market data, set up a signed client on testnet and subscribe to Hyperliquid WebSocket streams.

6 min read · [siebly.hashnode.dev](https://siebly.hashnode.dev/hyperliquid-javascript-sdk-quickstart-for-node-js-and-typescript?utm_source=hashnode&utm_medium=feed)

[2d ago](https://hashnode.com/posts/hyperliquid-javascript-sdk-quickstart-for-node-js-and-typescript/6af1b86f593f6d61fdf25ae3)

### [OKX WebSocket port 8443 is retired: fixing Node.js connections](https://siebly.hashnode.dev/okx-websocket-port-8443-is-retired-fixing-node-js-connections?utm_source=hashnode&utm_medium=feed)

OKX stopped accepting WebSocket connections on port 8443 on 31 October 2026 (Colo follows on 16 November). If your Node.js app still connects to wss://ws.okx.com:8443/..., the connection now fails. RE

2 min read · [siebly.hashnode.dev](https://siebly.hashnode.dev/okx-websocket-port-8443-is-retired-fixing-node-js-connections?utm_source=hashnode&utm_medium=feed)

[1](https://hashnode.com/posts/okx-websocket-port-8443-is-retired-fixing-node-js-connections/6af1b2b112366c0ff9ab6428) [2d ago](https://hashnode.com/posts/okx-websocket-port-8443-is-retired-fixing-node-js-connections/6af1b2b112366c0ff9ab6428)