Three endpoints went live: place an order, look one up by your own order number, and pull the current week's catalogue (bundles rotate weekly and the list carries your contracted prices, so don't hard-code it). Orders draw on your prepaid balance and are always priced by our side against your price list. Resubmitting the same reference never creates a second order — a retry after a timeout returns the original orders instead of charging again. Up to 20 items per submission; if any line fails a check or the balance falls short, nothing is created, so you never end up half-charged. Requests are signed, a clock more than five minutes off or a reused nonce is rejected, and each key is good for 120 calls a minute. You can have the customer tracking link generated with the order.