Sandbox Report
You can access sandbox report from here.

Prepaid
Change Transaction Status
For prepaid products, you must manually change the transaction status to success or failed in sandbox report. But in production environment, you don't need to manually change the transaction status because we are the one who will update the status manually through callback URL.

When you click SUCCESS button, the transaction will become success and when you click FAILED button, the transaction will become failed. Everytime you change the transaction status by clicking the button, IAK will send response to your development callback URL according to the status of transaction.
Postpaid
Change Transaction Status
In postpaid, sandbox report can be used to see the transaction details like status, price, admin, selling price, etc. For postpaid products, if the transaction status is pending, you can manually change the transaction status from pending to success or failed in sandbox report. But in production environment, you don't need to manually change the transaction status because we are the one who will update the status.

When you click SUCCESS button, the transaction will become success and when you click FAILED button, the transaction will become failed.
API Key
API key is mainly used to connect with IAK API as an identifier. Without API key, you cannot connect with IAK API.
Transaction Restriction
IAK API enables you to control the behavior of your transaction so you can put some limitation to the transaction. There are 2 limitation that you can set :