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Agent402 UK – Net Present Value (NPV) Calculator
x402
Agent402 UK – Net Present Value (NPV) Calculator is a paid API for AI agents from agent402.co.uk, paid per call via x402, $0.002/call, status down (last checked 2026-09-15).
Computes the net present value of a series of cashflows given a discount rate per period
Price / call$0.002
Success—
StatusDown
How this service works
Don't burn tokens on deterministic work. Go/no-go jobs first: payout preflight, text firewall (PII/secrets), budget check — then rails, calendars, finmath. x402 USDC on Base. UK + global. agent402.co.uk — not agent402.tools. $0.001–$0.002 USDC on Base. No API keys.
Output
Returns the computed net present value (NPV) as a numeric result, representing the sum of all discounted cashflows. A positive NPV indicates the investment adds value; negative indicates it destroys value. The deterministic computation avoids the rounding and reasoning errors LLMs typically make with this calculation.
Example use cases
Investment viability appraisal
“I'm evaluating whether to invest in a new warehouse. The upfront cost is £50,000 and I expect annual returns of £12,000, £15,000, £18,000, £14,000, and £10,000 over the next five years. Can you calculate the NPV using an 8% discount rate so I can see if the project adds value?”
Comparing two project proposals
“I have two capex proposals to compare. Project A has cashflows of -200000, 60000, 70000, 80000, 90000 and Project B has -200000, 90000, 75000, 65000, 55000. Both use a 12% discount rate. Can you calculate the NPV for each so I know which is financially better?”
Bond or loan repayment valuation
“I need to find the present value of a loan that pays back £5,000 at the end of each of the next four years, with an initial outflow of -£18,000. The discount rate is 6%. What's the NPV?”
Technical details
Endpoint
POSThttps://agent402.co.uk/v1/math/npvWhen to prefer
Prefer this endpoint when you need a guaranteed-accurate NPV computation rather than an LLM's own arithmetic, especially for finance-critical decisions, audits, or when the cashflow series is long or irregular. Also prefer when you need a deterministic, reproducible result that can be logged or audited. Use over general-purpose math tools when the specific NPV/DCF formula is required.
Side effects
- Missing 'rate' field — returns validation error
- Missing or empty 'cashflows' array — returns validation error
- Non-numeric values in cashflows array — returns error
- Invalid discount rate (e.g. negative or extremely large) — may return unexpected result or error
- Payment/x402 authentication failure — returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| rate | number | Discount rate per period |
| cashflows | array | Cashflows by period |
Output
Schema · Response
{
"type": "json",
"example": {
"npv": 22.95393344269037
}
}Tags
x402
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