Read your merchant account and the payin settings that apply to it.
The merchant is your account when it accepts payins. Its ID, the merchantId on every checkout, starts with C- and is the same as your payorId. Read it to check which currencies and payment method types you can accept before you create checkouts or plans, and whether settlement reporting is enabled. Payment Labs sets these values; you cannot change them through the API.
See Payins Overview.