# Numora Simple Interest Calculator

> Numora Simple Interest Calculator is a paid API for AI agents from numomo.vercel.app, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).

Computes simple interest and related financial values given a principal amount, interest rate, and number of periods

## Facts

- Endpoint: POST https://numomo.vercel.app/api/financial/simple-interest
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/numora-simple-interest-calculator-c162b336
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_k7EUopJA3kJwdLkATBDHR

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 numora-simple-interest-calculator-c162b336 -d '<json body>'
```

Example prompt: What's the simple interest on a $10,000 principal at an annual rate of 6% over 5 years?

## When to prefer this

Use this endpoint when you need a quick, dependency-free computation of simple interest (non-compounding) for a known principal, rate, and number of periods. Prefer it over compound interest or amortization endpoints when the financial product explicitly uses flat/simple interest, such as short-term loans, trade credit, or basic savings instruments. It is ideal for AI agents needing deterministic, serverless math without calling a general-purpose LLM or spreadsheet tool.

## Known failure modes

- Missing required fields (rate, periods, or principal) returns a 400-level error
- Non-numeric values for rate, periods, or principal cause a validation failure
- Negative principal or rate values may produce unexpected or erroneous results
- Payment failure via x402 micropayment protocol results in a 402 Payment Required error
- Service unavailability on Vercel hosting may cause intermittent 503 errors

## How this service works

100 pure math computation endpoints for AI agents. Statistics, financial math, linear algebra, equation solving, calculus, number theory, sequence generation, and unit conversions. Zero external dependencies. x402 micropayments on Base.

## Output

Returns a JSON object with a boolean 'success' field, a 'computation' string describing what was calculated in human-readable form, and a 'result' object containing the computed simple interest values (typically the interest amount and possibly total amount due).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "rate",
  "periods",
  "principal"
 ],
 "properties": {
  "rate": {
   "type": "number"
  },
  "periods": {
   "type": "number"
  },
  "principal": {
   "type": "number"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "success",
  "result",
  "computation"
 ],
 "properties": {
  "result": {
   "type": "object",
   "description": "Computation result varies by endpoint"
  },
  "success": {
   "type": "boolean",
   "description": "Always true on success"
  },
  "computation": {
   "type": "string",
   "description": "Human-readable description of what was computed"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/numora-simple-interest-calculator-c162b336/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from numomo.vercel.app](https://www.zero.xyz/host/numomo.vercel.app/llms.txt)