Note

Opens and activates a brokerage account for one of your end users — the first call you make for any new client, before you can fund them or trade on their behalf.

You identify the client with your own brokerClientId: an id from your own system that you assign and control. Reuse the exact same brokerClientId on every later funding, trading and reporting call for that user, so keep it unique per user and stable over time. You never touch BrokerX's internal account numbers

The call is idempotent — if an account already exists for that brokerClientId, it simply returns the current status instead of creating a duplicate, so it is always safe to retry. Accounts are cash accounts today; the response returns the account status (1 = active).