Overview

Welcome to BigONE Developer API V3 Documents

Base Endpoint

SPOT

API: https://big.one/api/v3/

WS: wss://big.one/ws/v2

CONTRACT

API: https://big.one/api/contract/v2/

WS: wss://big.one/ws/contract/v2/

We recommend you to place your server at HongKong or Tokyo for a stable connection and fast access.

If you need to use API to trade ETFs, please contact BigONE customer service to apply for ETF API access permissions.