Our API is based on REST principles which means that our URLs are resource oriented ("Orders", "Traders") and that we use HTTP verbs such as POST, PUT and GET to distinguish between different types of actions. We use JSON in the body for all requests and responses and we use standard HTTP response codes to indicate success or failure.
You should use the right baseURL and your API key in the "Authorization" field of the HTTP header . For more details on both, see here