# Numora Annuity Calculator

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

Computes the present or future value of an annuity given a periodic payment amount, interest rate, and number of periods

## Facts

- Endpoint: POST https://numormor.netlify.app/api/financial/annuity
- 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-annuity-calculator-901b7bad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6DJfTiu_h6_Dh5uNUyD6F

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-annuity-calculator-901b7bad -d '<json body>'
```

Example prompt: Calculate the present value of an ordinary annuity with monthly payments of $500 at an annual interest rate of 6% over 30 years (360 periods).

## When to prefer this

Use this endpoint when you need a pure, dependency-free server-side annuity computation without building your own time-value-of-money formula. Ideal for AI agents performing financial planning, loan analysis, retirement projections, or comparing lump-sum vs payment-stream equivalences. Prefer it over generic calculators when you want a structured JSON response with a human-readable explanation of the computation.

## Known failure modes

- Missing required fields (rate, payment, or periods) returns an error
- Non-positive periods or zero-rate edge cases may produce unexpected results
- Invalid annuity type string may default or error
- Payment amount of 0 returns trivial zero result
- Network or server unavailability on Netlify hosting

## 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 flag, a result object containing the computed annuity value (present or future depending on type), and a human-readable computation string describing what was calculated.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "rate",
  "payment",
  "periods"
 ],
 "properties": {
  "rate": {
   "type": "number"
  },
  "type": {
   "enum": [
    "ordinary",
    "due"
   ],
   "type": "string"
  },
  "payment": {
   "type": "number"
  },
  "periods": {
   "type": "integer"
  }
 }
}
```

## 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-annuity-calculator-901b7bad/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from numormor.netlify.app](https://www.zero.xyz/host/numormor.netlify.app/llms.txt)