# Numora Internal Rate of Return (IRR) Calculator

> Numora Internal Rate of Return (IRR) 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 Internal Rate of Return (IRR) for a series of cash flows using pure math computation

## Facts

- Endpoint: POST https://numorapoi.orbonomy.xyz/api/financial/irr
- 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-internal-rate-of-return-irr-calculator-dc3ca101
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mz9rL2TQENsZKGrvoKjSn

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-internal-rate-of-return-irr-calculator-dc3ca101 -d '<json body>'
```

Example prompt: Calculate the IRR for an investment with these cash flows: -100000 initial outlay, then 30000, 40000, 50000, and 20000 over the following four years.

## When to prefer this

Choose this endpoint when you need a fast, dependency-free computation of IRR from a cash flow array without setting up a financial library or runtime. Ideal for AI agents performing capital budgeting, investment comparison, or project evaluation that need a pure-math backend with micropayment pricing and no API key management overhead.

## Known failure modes

- No real IRR exists (all-positive or all-negative cash flows yield no root) — returns error or NaN
- Non-convergence if the iterative solver fails to find a root within tolerance — may return error
- Empty or single-element cashflows array — likely returns validation error
- Malformed input array (non-numeric values) — returns 400 or error response
- Payment required (HTTP 402) if x402 micropayment header is missing or invalid

## 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' (boolean), 'result' (object containing the computed IRR value as a decimal or percentage), and 'computation' (a human-readable description of what was computed, e.g. 'Internal rate of return for 5 cash flows').

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "cashflows"
 ],
 "properties": {
  "cashflows": {
   "type": "array"
  }
 }
}
```

## 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-internal-rate-of-return-irr-calculator-dc3ca101/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)