If you have multiple websites from where you initiate payments to our system, there are two posibilities for managing your websites.
First one, is to manage your websites via the API and this is described next!
Second one, is to manage your websites via Merchant Dashboard. You can define more sites with distinct API Keys from the Merchant Dashboard, Configuration tab, Add a New Site. This allows you to manage multiple websites under the same merchant account.
MerchantTransactionID must be unique for each website!