Environments

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

Exchange	Region, Environment	region, env
STX US demo	STXRegion.US, STXEnvironment.Demo	us, demo
STX Ontario demo	STXRegion.Ontario, STXEnvironment.Demo	ontario, demo
STX Ontario	STXRegion.Ontario, STXEnvironment.Production	ontario, production

using var client = new STXClient(new STXClientOptions
{
    Region = STXRegion.US,
    Environment = STXEnvironment.Demo,
    KeyId = keyId,
    PrivateKey = privateKey,
});

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

To reach any other host, such as a local server, set Host = "http://localhost:4000" (or STX_HOST). The URL’s scheme is kept for both HTTP and the socket. VerifyTls = false accepts a self-signed certificate; use it only locally.