# Numora Financial Payback Period Calculator

> Numora Financial Payback Period 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 payback period for an investment given a series of cash flows and an initial investment amount

## Facts

- Endpoint: POST https://numormor.netlify.app/api/financial/payback
- 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-financial-payback-period-calculator-4c2a3d16
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qv2Wnyra921JhNyLE_c3u

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-financial-payback-period-calculator-4c2a3d16 -d '<json body>'
```

Example prompt: Calculate the payback period for an initial investment of $50000 with monthly cash flows of [8000, 10000, 12000, 15000, 20000] — I need to know how many periods it takes to fully recover the investment.

## When to prefer this

Use this endpoint when you need a deterministic, serverless pure-math payback period calculation with no external data dependencies. Ideal for AI agents performing capital budgeting, project evaluation, or investment recovery analysis when you already have the cash flow series and investment amount. Prefer over general-purpose calculators when you want a structured JSON response and micropayment-gated reliability via x402 on Base.

## Known failure modes

- Missing required 'cashflows' array or 'investment' number returns validation error
- Empty cashflows array may cause computation failure
- Investment never recovered by provided cash flows may return Infinity or error
- Non-numeric values in cashflows array cause computation failure
- Negative investment value may produce unexpected results
- Payment failure or insufficient USDC balance blocks the request

## 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 success status (boolean), a result object containing the computed payback period value (number of periods to recover the investment), and a human-readable computation string describing what was calculated.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "cashflows",
  "investment"
 ],
 "properties": {
  "cashflows": {
   "type": "array"
  },
  "investment": {
   "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-financial-payback-period-calculator-4c2a3d16/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)