When interacting with the POST loans API you may customize the scheduled payments more than just the default. To do so start by selecting from the paymentFrequency there are 4 options: weekly, bi-weekly, monthly, & semi-monthly. In order to interact with these payment schedules the following are required:

All:

firstPaymentDate is required to set the basis for all date calculations

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weekly & bi-weekly:

weekdayOfFirstPayment sets the day of the week such as Wednesday that will process each week or every other week starting from the firstPaymentDate

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monthly:

scheduleType has 2 options Day-Based & Weekday-Based which further selects which attributes where needed

Day-Based:

firstPaymentDay is an int for the day of the month. Selecting 31 will always default to the last of the month for 30-day months and February.

Weekday-Based:

weekOfFirstPayment is an int for the week number of the month ranging from 1 to 5. 5 is the last week of every month even on months with 4 weeks.

weekdayOfFirstPayment Will be the day of the week for the second payment for example Tuesday

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semi-monthly:

scheduleType has 2 options Day-Based & Weekday-Based which further selects which attributes where needed

Day-Based:

firstPaymentDay is an int for the day of the month. Selecting 31 will always default to the last of the month for 30-day months and February.
secondPaymentDay is an int for the day of the month. Selecting 31 will always default to the last of the month for 30-day months and February.

Weekday-Based:

weekOfFirstPayment iis an int for the week number of the month ranging from 1 to 5. 5 is the last week of every month even on months with 4 weeks.
weekdayOfFirstPayment Will be the day of the week for the second payment for example Tuesday
weekOfSecondPayment is an int for the week number of the month ranging from 1 to 5. 5 is the last week of every month even on months with 4 weeks.
weekdayOfSecondPayment Will be the day of the week for the second payment for example Thursday