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GeekVault Loan Calculator
x402
GeekVault Loan Calculator is a paid API for AI agents from api.geekvault.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-30).
Calculates monthly payment, total paid, and total interest for a loan given principal, term, and annual interest rate
Price / call$0.002
Success—
StatusUnknown
How this service works
Network, docs, image, web, and dev utility tools paid per call via x402. No signup, no API keys, no subscriptions — just USDC on Base.
Output
Returns a JSON object with the original principal, annual rate, term in months, calculated monthly payment, total amount paid over the life of the loan, and total interest paid — all as floating-point numbers.
Example use cases
Personal loan affordability check
“I'm thinking of taking out a $15,000 personal loan over 36 months at 8.9% annual interest — what would my monthly payment be and how much total interest would I end up paying?”
Home mortgage cost estimate
“Can you figure out the monthly payment and total interest for a $350,000 mortgage at 7.2% annual rate over 360 months?”
Business equipment financing
“We're financing $80,000 of equipment at 5.5% annual interest over 48 months — what will our monthly payment be and what's the total we'll pay back?”
Technical details
Endpoint
GEThttps://api.geekvault.dev/dev-tools/v1/loan-calculate?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, serverless loan amortization calculation without building your own math — especially in agentic workflows where the user provides principal, rate, and term and expects monthly payment and total interest instantly. No signup or API key required; pay per call with USDC on Base via x402.
Side effects
- Missing required fields (principal, term_months, or annual_rate_percent) result in a 4xx error
- Non-numeric or negative values for principal or rate may cause validation errors
- term_months must be a positive integer; zero or negative values will likely fail
- Payment failure via x402 (insufficient USDC balance) will block the call before computation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| principalrequired | number | |
| term_monthsrequired | integer | |
| annual_rate_percentrequired | number |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| principalrequired | number | |
| total_paidrequired | number | |
| term_monthsrequired | integer | |
| total_interestrequired | number | |
| monthly_paymentrequired | number | |
| annual_rate_percentrequired | number |
Tags
x402
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