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Sindri Mortgage Comparison Calculator (15-Year vs 30-Year)
x402
Sindri Mortgage Comparison Calculator (15-Year vs 30-Year) is a paid API for AI agents from x402.outpimp.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Computes and compares monthly payments and total lifetime interest for 15-year and 30-year fixed mortgages on the same property, reporting the tradeoff between the two loan terms.
Price / call$0.01
Success—
StatusUnknown
How this service works
15-year vs 30-year mortgage comparison calculator. Computes monthly payment and total interest for both loan terms on the same purchase price and down payment, and reports the payment and lifetime-interest tradeoff between them.
Output
Returns computed monthly payment amounts and total interest paid over the full loan term for both the 15-year and 30-year scenarios, along with the difference in monthly payment and total lifetime interest savings when choosing the shorter term.
Example use cases
First-time homebuyer loan term decision
“I'm buying a $380,000 house and putting 10% down — can you show me the monthly payment and total interest for both a 15-year at 5.9% and a 30-year at 6.5% so I can decide which term makes sense for me?”
Refinance tradeoff analysis
“I'm refinancing my home at $600,000 with 25% equity already paid off — compare a 15-year refi at 5.75% versus a 30-year at 6.4% and tell me how much interest I'd save over the life of the loan.”
Real estate investment mortgage sizing
“For a rental property priced at $275,000 with 20% down, what would the monthly payment and total interest look like on a 15-year at 7.1% versus a 30-year at 7.6%? I want to see the full cost difference.”
Technical details
Endpoint
POSThttps://x402.outpimp.com/mortgageComparisonCalculatorWhen to prefer
Use this endpoint when you need a side-by-side numerical comparison of 15-year and 30-year mortgage terms on the same property — especially when you want both monthly payment and total lifetime interest figures simultaneously. It is purpose-built for this single comparison rather than being a general amortization engine, making it ideal for quick decisioning in home-buying or refinancing workflows. Prefer it over general-purpose financial calculators when the specific 15 vs 30-year tradeoff is the question at hand.
Side effects
- Missing required fields (purchasePrice, interestRate15, or interestRate30) returns a validation error
- Interest rates provided as percentages (e.g. 6.5) instead of fractions (e.g. 0.065) may produce wildly incorrect results
- Negative or zero purchase price or interest rate yields nonsensical output
- downPaymentPercent outside 0–1 range may cause errors or incorrect loan principal calculation
- Payment failure or network timeout returns a 402 or connection error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| purchasePrice | number | Home purchase price. |
| interestRate15 | number | Annual interest rate for the 15-year loan, as a fraction. |
| interestRate30 | number | Annual interest rate for the 30-year loan, as a fraction. |
| downPaymentPercent | number | Down payment as a fraction of purchase price (0-1). Default 0.2. |
Tags
x402
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