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SignalDesk AI Payback Period Calculator
x402
SignalDesk AI Payback Period Calculator is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).
Calculates the payback period (number of periods to recover an investment) given an initial investment amount and a series of periodic inflows
Price / call$0.001
Success—
StatusUnknown
How this service works
Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.
Output
Returns a JSON object with: the number of periods (decimal) to recover the investment ('periods'), a boolean indicating whether full recovery was achieved within the provided inflows ('recovered'), and a disclaimer notice that the result is a floating-point calculation from supplied inputs only and does not constitute tax, investment, or lending advice.
Example use cases
Startup equipment ROI check
“We bought $120,000 of manufacturing equipment and our monthly revenue from it is projected to be $18,000, $22,000, $25,000, $30,000, $30,000, and $35,000. How many months before we pay it back?”
Real estate rental payback analysis
“I'm evaluating a rental property that cost $200,000 and will generate net rent of $2,500, $2,500, $2,800, $3,000, $3,000, $3,200, and $3,200 per month — what's the payback period?”
Marketing campaign cost recovery
“We spent $15,000 on a marketing campaign and it's bringing in $3,000, $4,500, $5,000, $6,000, and $4,000 in incremental revenue each month — calculate how many months until we've recovered the spend.”
Technical details
Endpoint
POSThttps://x402-agent.kariguetoazul.workers.dev/api/finance/payback-period?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, serverless computation of payback period from a discrete list of periodic cash inflows against a single upfront investment. Ideal for lightweight agent workflows that need a quick capital-recovery estimate without a full financial modeling suite. Prefer this over building your own loop logic when inflows are already known as an array and you want a single authoritative floating-point result with bounded execution cost ($0.001 USDC per call).
Side effects
- Missing 'investment' field returns validation error
- Empty or missing 'inflows' array returns validation error
- Inflows array exceeding 1000 items rejected
- Investment or inflow values exceeding 1,000,000,000,000 rejected
- Negative inflow values rejected
- Payment not made via x402 returns 402 Payment Required
- If inflows never cover the investment, 'recovered' is false and 'periods' may reflect partial progress
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inflows | array | Non-negative inflows. |
| investment | number | Amount in one consistent currency; floating-point calculation, not an accounting ledger. |
Output
Schema · Response
{
"type": "json",
"example": {
"notice": "Calculation from supplied inputs only; no tax, investment or lending advice.",
"periods": 2.5,
"recovered": true
}
}Tags
x402
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