API docs
One SSE stream. Your feed starts with a snapshot of every match and market, then sends every change as it happens: odds, results, settlements, cancellations and rollbacks.
Your API key and the reference come with your trial. After you start it, your backoffice shows your key, the API reference and a quickstart you can paste into a terminal.
Your margins are set in the same backoffice: the overround of each market and your price ladder.