# Numora Simple Interest Calculator

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

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

## Facts

- Endpoint: POST https://numormo.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-18be139a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dF636WT1ELAjEnOn2zMDI

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-18be139a -d '<json body>'
```

Example prompt: Calculate the simple interest on a principal of $5000 at an annual rate of 6% over 3 periods.

## When to prefer this

Choose this endpoint when you need a deterministic, server-side simple interest computation with no external data dependencies. Prefer it over compound interest endpoints when the use case explicitly involves non-compounding interest (flat-rate loans, basic savings). It is ideal for AI agents needing verifiable, reproducible arithmetic without implementing the formula themselves.

## Known failure modes

- Missing required fields (principal, rate, or periods) returns a validation error
- Non-numeric values for any of the three fields cause a 400-level error
- Payment failure via x402 micropayment (insufficient USDC balance) blocks the request
- Network timeout if Vercel cold-start latency is high

## 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 'result' object containing the computed simple interest value, and a 'computation' string describing in plain English what was calculated.

## 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-18be139a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from numormo.vercel.app](https://www.zero.xyz/host/numormo.vercel.app/llms.txt)