As a Financial company, Midtrans provides complete payment solutions tailored to your business. You can accept payments and make payouts easily. They simplify your payments so you can focus on growing your business. Accessing Administration Portal Click Login on the Midtrans website. 

Short Direction: {Amazcart> Dashboard> Payment Gateways> Midtrans> Sandbox/Live> Merchant Server Key> Merchant Client Key> Gateway Logo> Update.}

You can choose two ways to get your payment on the Sandbox or Live. While the server key is used for the remainder of API calls on the server side. The client key generates credit card tokens for Core API implementation. 

1- Midtrans

2- Sandbox/Live

3- Merchant Server Key

4- Merchant Client Key

5- Gateway Logo

6- Update it.