{"ok":true,"tool":"pragmatic.get_calculator_schema.v1","result":{"calculator":{"slug":"prepayment-impact","title":"Prepayment Impact","description":"One-time and recurring prepayments—interest saved and years shaved.","category":"payments","url":"https://pragmatic.mortgage/calculators/prepayment-impact","inputSchema":{"type":"object","properties":{"principal":{"anyOf":[{"type":"number"},{"type":"string","pattern":"^-?\\d+(?:\\.\\d+)?$"}]},"nominalRatePercent":{"anyOf":[{"type":"number"},{"type":"string","pattern":"^-?\\d+(?:\\.\\d+)?$"}]},"amortizationMonths":{"type":"integer","minimum":60,"maximum":420},"termMonths":{"type":"integer","minimum":6,"maximum":120,"default":60},"frequency":{"type":"string","enum":["monthly","semi_monthly","biweekly","accelerated_biweekly","weekly","accelerated_weekly"]},"compounding":{"type":"string","enum":["semi_annual","monthly","annual"],"default":"semi_annual"},"startDateISO":{"type":"string","format":"date-time"},"oneTime":{"type":"array","items":{"type":"object","properties":{"amount":{"anyOf":[{"type":"number"},{"type":"string","pattern":"^-?\\d+(?:\\.\\d+)?$"}]},"paymentNumber":{"type":"integer","minimum":1},"label":{"type":"string","enum":["Option A","Option B","Option C","Current payment","Current offer","Alternative offer","Lender retention","Market offer","Prepayment","Lump sum","Recurring increase"]}},"required":["amount","paymentNumber"],"additionalProperties":false},"default":[]},"recurringIncrease":{"type":"object","properties":{"amount":{"anyOf":[{"type":"number"},{"type":"string","pattern":"^-?\\d+(?:\\.\\d+)?$"}]},"startPayment":{"type":"integer","minimum":1}},"required":["amount","startPayment"],"additionalProperties":false}},"required":["principal","nominalRatePercent","amortizationMonths","frequency"],"additionalProperties":false}}}}