
Bitget books50 goes incremental on 1 December: keeping a local order book in Node.js
What changes on the 50-level depth channel, and a small TypeScript-friendly handler that works before and after the switch
Open-source JavaScript and TypeScript SDKs for crypto exchange APIs. https://siebly.io

What changes on the 50-level depth channel, and a small TypeScript-friendly handler that works before and after the switch
Public and private REST calls, Classic WebSocket streams and a safe test order with kucoin-api
Install @siebly/hyperliquid-api, read public market data, set up a signed client on testnet and subscribe to Hyperliquid WebSocket streams.
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