# Numora Annuity Calculator

> Numora Annuity Calculator is a paid API for AI agents from numorapoi.orbonomy.xyz, paid per call via x402, $0.05/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://numorapoi.orbonomy.xyz/api/financial/annuity
- Price: $0.05/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-892016c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7tNYCyi6iEK592UPcBWt2

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-892016c5 -d '<json body>'
```

Example prompt: What's the present value of an ordinary annuity with monthly payments of $800 at an annual interest rate of 6% over 60 periods?

## When to prefer this

Choose this endpoint when you need a pure serverless, dependency-free annuity computation without connecting to a financial data provider. Ideal for AI agents doing financial planning calculations, retirement modeling, or loan analysis where only mathematical formulas are needed and no live market data is required.

## Known failure modes

- Missing required fields (rate, payment, or periods) returns a validation error
- Non-positive periods integer causes computation failure
- Extreme rate values (e.g. negative or very large) may produce mathematically undefined or infinite results
- Invalid annuity type string may default to ordinary or return an error
- Payment processing failure via x402 returns 402 status before computation begins

## 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 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-892016c5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from numorapoi.orbonomy.xyz](https://www.zero.xyz/host/numorapoi.orbonomy.xyz/llms.txt)