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Arcus is a next-generation decentralized exchange built by dYdX Labs, designed from the ground up for trading tokenized equities and perpetuals. This site documents the Arcus REST and WebSocket APIs. Start with the introduction below, or jump straight to the endpoints reference.

REST API introduction

Base URLs, request/response shapes, and where to go next.

Authentication

Generate an Ed25519 key, register it, and sign requests.

WebSocket overview

Connect once and subscribe to channels for market data and order updates.

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