# Numora Annuity Calculator

> Numora Annuity Calculator is a paid API for AI agents from numomo.vercel.app, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-13).

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

## Facts

- Endpoint: POST https://numomo.vercel.app/api/financial/annuity
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/numora-annuity-calculator-74923608
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tO64okZsECIfd7hgPyvgk

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-74923608 -d '<json body>'
```

Example prompt: Calculate the present value of an ordinary annuity with a $1,200 monthly payment at an annual rate of 5% over 15 years (180 periods).

## When to prefer this

Choose this endpoint when you need a fast, serverless, zero-dependency annuity calculation with micropayment pricing via x402 on Base. Ideal for AI agents that need to compute time-value-of-money annuity figures (present or future value) without spinning up a financial library or calling a heavyweight financial data API. Best suited for agents doing on-the-fly financial math rather than fetching live market data.

## Known failure modes

- Missing required fields (rate, payment, or periods) returns a validation error
- Non-numeric rate or payment values cause a 400 bad request
- Negative or zero periods may return an error or undefined result
- Invalid annuity type string may default to ordinary annuity or return an error
- Extremely large period counts or rates may cause numeric overflow

## 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 success flag, a result object containing the computed annuity value (present or future value depending on the request), 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": {
   "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-74923608/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)