Environments

The exchanges, their hosts and which one to start with are listed on Environments. In the SDK, pick one with region and env (as keyword arguments, as STX_REGION and STX_ENV, or in a credentials profile):

Exchange	region	env
STX US demo	"us"	"demo"
STX Ontario demo	"ontario"	"demo"
STX Ontario	"ontario"	"production"

from stx import STX, Environment, Region

with STX(region="us", env="demo") as client:
    print(client.base_url, client.socket_url)

# same exchange:
same = STX(region=Region.US, env=Environment.DEMO)
same.close()

env also accepts "prod" and "live" for production.

An API key works on one exchange only, so keep one credentials profile per exchange and switch with profile; see Authentication.

To reach any other host, such as a local server, pass host="http://localhost:4000" (or set STX_HOST). The URL’s scheme is kept for both HTTP and the socket, so http:// talks plain HTTP and ws://. verify_tls=False (or STX_VERIFY_TLS=false) turns off certificate checks; use it only for a local server.