Build trading bots, market-data dashboards and account tools for Hyperliquid with @siebly/hyperliquid-api, Siebly's open-source JavaScript and TypeScript SDK for Node.js, built on the same architecture that has over 4 million downloads on NPM.
Read prices, order books, candles, balances and positions.
Place and cancel Spot and perpetual orders.
Subscribe to live market data and account updates.
Send API requests over REST or WebSocket.
The SDK handles action signing, asset lookup, WebSocket heartbeats, reconnects and resubscriptions. Let the SDK handle your plumbing while your application focuses the trading logic and account state handling.
Start with the Hyperliquid JavaScript tutorial: install the SDK, make a public market-data call without a wallet, then work through streams and Testnet order examples. The guide also covers API wallets, proxy configuration and WebSocket best practices.
npm install @siebly/hyperliquid-api
The package is free to install. Hyperliquid trading fees and any approved builder fees apply.
