# Numora Payback Period Calculator

> Numora Payback Period 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 payback period for an investment given a series of cash flows

## Facts

- Endpoint: POST https://numorapoi.orbonomy.xyz/api/financial/payback
- 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-payback-period-calculator-dd37accd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_95pyyE1CFCLxvsRp8JZMM

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-payback-period-calculator-dd37accd -d '<json body>'
```

Example prompt: Calculate the payback period for an initial investment of $50,000 with annual cash flows of [$10,000, $15,000, $20,000, $18,000, $12,000].

## When to prefer this

Use this endpoint when you need a pure server-side payback period calculation with no external dependencies, especially in automated agent workflows using x402 micropayments on Base. Prefer this over spreadsheet tools or general-purpose math libraries when you need a reliable, stateless API call for capital budgeting analysis.

## Known failure modes

- Missing required 'investment' field returns validation error
- Missing or empty 'cashflows' array returns validation error
- Non-numeric values in cashflows array may cause computation error
- Investment never recovered from cash flows may return infinite or error result
- Payment failure via x402 micropayment returns 402 status

## 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:true, a result object containing the computed payback period (in periods/years), 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-payback-period-calculator-dd37accd/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)