# Sindri Loan Payment Calculator

> Sindri Loan Payment Calculator is a paid API for AI agents from x402.outpimp.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Computes the fixed monthly payment for an amortizing loan and returns a full month-by-month amortization schedule with principal, interest, and remaining balance for each period.

## Facts

- Endpoint: POST https://x402.outpimp.com/loanPaymentCalculator
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sindri-loan-payment-calculator-42a92a9f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nUjNmfMaSAqtnI2-MHmCr

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sindri-loan-payment-calculator-42a92a9f -d '<json body>'
```

Example prompt: Can you calculate my monthly payment and give me the full amortization schedule for a $250,000 mortgage at 6.5% annual interest over 30 years?

## When to prefer this

Choose this endpoint when you need mathematically precise, period-by-period amortization schedules that an LLM cannot reliably compute by hand — especially for long loan terms (e.g. 240–360 periods). Prefer it over manual LLM arithmetic whenever the user needs the exact monthly payment figure or a full breakdown of how principal and interest are allocated each month. It is purpose-built for standard fixed-rate amortizing loans.

## Known failure modes

- Missing required fields (principal or annualRate) return a validation error
- annualRate provided as a percentage integer (e.g. 6) instead of a fraction (0.06) will produce wildly incorrect results
- termYears outside the 1–50 range may return an error or unexpected behavior
- Zero or negative principal/rate values may cause computation errors
- Network or payment authorization failure returns a 402 or connectivity error

## How this service works

Loan payment calculator. Computes the fixed monthly payment for a standard amortizing loan and returns the full month-by-month principal/interest/balance schedule — exact amortization math an LLM cannot reliably compute by hand for hundreds of periods.

## Output

Returns the fixed monthly payment amount and a complete amortization schedule listing each period's principal portion, interest portion, and remaining loan balance — covering every month from period 1 through the final payoff.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "principal": {
   "type": "number",
   "description": "Loan principal amount."
  },
  "termYears": {
   "type": "number",
   "default": 20,
   "description": "Loan term in years (1-50). Default 20."
  },
  "annualRate": {
   "type": "number",
   "description": "Annual interest rate, as a fraction (e.g. 0.06 for 6%)."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sindri-loan-payment-calculator-42a92a9f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.outpimp.com](https://www.zero.xyz/host/x402.outpimp.com/llms.txt)