Email your request to the support team to obtain sandbox credentials to use Obtain a token.
2.
Complete onboarding. Sandbox uses the same steps as production. See 1. Onboarding below. Westpay's demo Access portal is https://demo-access.westpay.se.
3.
Create a payment with paymentChannelId16 and the linked Westpay terminal id. See 2. Payment request below.
Now you are good to create a card payment and start integrating.