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Foundry Loan & Mortgage Calculator
x402
Foundry Loan & Mortgage Calculator is a paid API for AI agents from minty-sprout.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-11-01).
Calculates monthly payment, total amount paid, and total interest for a loan or mortgage given principal, annual rate, and term in years.
Price / call$0.001
Success—
StatusUnknown
How this service works
Loan and mortgage calculator: monthly payment, total paid and total interest. Input: 'amount, rate %, years'.
Output
Returns a JSON object with: monthly_payment, total_paid, total_interest, principal, annual_rate_percent, years, and payments (number of monthly payments). All monetary values are in the same currency as the input amount.
Example use cases
First-time homebuyer mortgage estimate
“I'm looking at a $450,000 house and planning to put $90,000 down, so I'd need a $360,000 mortgage at 7.1% for 30 years — what's my monthly payment and total interest?”
Compare 15 vs 30 year loan terms
“Can you calculate the monthly payment and total interest on a $250,000 loan at 6.5% for both 15 years and 30 years so I can compare them?”
Personal loan total cost check
“I'm taking out a $20,000 personal loan at 11.5% annual interest over 5 years — what will my monthly payments be and how much total interest will I pay?”
Technical details
Endpoint
POSThttps://minty-sprout.onrender.com/v1/loan-calculator?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, accurate loan or mortgage amortization calculation given a principal amount, annual interest rate, and loan term in years. It returns all key figures (monthly payment, total paid, total interest) in a single call without requiring complex setup. Best suited for personal finance assistants, real estate tools, or any agent that needs to answer 'how much will this loan cost me?' type questions.
Side effects
- Missing or malformed input string (amount, rate, years not parseable) — likely returns an error or unexpected output
- Negative or zero values for rate or years — may produce invalid results
- Extremely large loan amounts or unusual rate values may produce edge-case outputs
- Service unavailability on Render's free tier may cause cold-start delays or timeouts
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | string | 'amount, annual rate %, years' |
Output
Schema · Response
{
"type": "json",
"example": {
"years": 30,
"payments": 360,
"principal": 250000,
"total_paid": 568861.22,
"total_interest": 318861.22,
"monthly_payment": 1580.17,
"annual_rate_percent": 6.5
}
}Tags
x402
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