Preview Installment Payment Calendar
GET/api/v2/installment-plans/preview
The payment calendar the invoice screen shows before the invoice exists.
Gated on invoice creation, like /selectable: seeing what you are about to offer is
part of raising an invoice. scheduled_on is the invoice due date, which anchors the
first payment; installments_start_date moves every payment after it, and defaults
to following the first when omitted. plan_id is optional -- without one the amount
resolves the plan, which is what an invoice carrying no plan would do at checkout.
One entry per schedule the plan offers at this amount: a plan may hold several, and the payer is the one who finally picks between them.
Request
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Successful Response
Validation Error