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TradeZero Developer Portal

Start building with TradeZero

REST and WebSocket APIs for stocks, options, and short locates. Paper and live accounts share the same base URL — authenticate, place orders, and stream portfolio updates programmatically.

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Launchpad

Jump straight to the resource you need.

Quick Start

Step-by-step recipes from your first API call through order placement, multi-leg options spreads, locates, and WebSocket streams — in Python and TypeScript.

Get your API key

Generate credentials in the TradeZero Portal and authenticate your first request.

Short Locates

Quote, accept, and sell back short-locate inventory over the REST API (live accounts only).

Options Trading

Place single- and multi-leg options orders, browse OCC chains, and manage option positions over the same REST and WebSocket API.