Authentication & Access
Authentication & Access
Authorize the market-data WebSocket with your access token.
Market data uses the same account and credentials as the Trade API — there’s no separate signup. If you don’t have access yet, start with Getting Started; for the full token flow, see the Trade API Authentication & Access guide.
The Market Data Access Token
When you request an access token, the response includes two tokens:
accessToken— for REST requests and the trading WebSocket.mdAccessToken— for the market-data WebSocket.
Use mdAccessToken to authorize the market-data connection.
Market Data Servers
Market data is served from a dedicated host, separate from the trading API:
Authorizing the Connection
A WebSocket connection is authorized once per session. After opening the socket, send an authorize request with your mdAccessToken:
A successful response looks like a[{"s":200,"i":1}]. For the connection and frame-decoding details, see Real-Time Data via WebSocket; for the underlying protocol, see the Trade API WebSocket guide.