# SignalDesk AI – Net Present Value (NPV) Calculator

> SignalDesk AI – Net Present Value (NPV) 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).

Computes the net present value of a series of cash flows given a periodic discount rate

## Facts

- Endpoint: POST https://x402-agent.kariguetoazul.workers.dev/api/finance/npv?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signaldesk-ai-net-present-value-npv-calculator-0e4d451b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YvooZG6YgYObVBpBaY7wc

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 signaldesk-ai-net-present-value-npv-calculator-0e4d451b -d '<json body>'
```

Example prompt: Calculate the NPV of a project with cash flows of [-50000, 15000, 20000, 25000, 18000] using a 10% periodic discount rate.

## When to prefer this

Choose this endpoint when you need a quick, serverless, per-call NPV calculation without setting up local financial libraries. At $0.001 USDC per call it is cost-effective for one-off or agent-driven evaluations of up to 500 cash flow periods. Prefer this over general-purpose LLM arithmetic for verifiability, or over full financial platforms when you only need NPV without IRR, sensitivity tables, or scenario modeling.

## Known failure modes

- Missing required fields (cash_flows or rate_percent) returns a validation error
- cash_flows array with more than 500 items is rejected
- rate_percent below -99 or above 1000 is out of bounds and rejected
- Individual cash flow values exceeding ±1,000,000,000,000,000 are rejected
- Malformed JSON body returns a parse error
- Payment not provided or insufficient USDC balance results in 402 Payment Required

## 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 computed NPV as a floating-point number (positive = value-accretive at the given rate, negative = value-destructive) and a disclaimer notice clarifying the result is a pure mathematical calculation with no tax, investment, or lending advice implied.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "cash_flows": {
   "type": "array",
   "items": {
    "type": "number",
    "maximum": 1000000000000000,
    "minimum": -1000000000000000
   },
   "maxItems": 500,
   "minItems": 1,
   "description": "Signed period cash flows."
  },
  "rate_percent": {
   "type": "number",
   "maximum": 1000,
   "minimum": -99,
   "description": "Discount per period."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "npv": 4.132231404958667,
  "notice": "Calculation from supplied inputs only; no tax, investment or lending advice."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signaldesk-ai-net-present-value-npv-calculator-0e4d451b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent.kariguetoazul.workers.dev](https://www.zero.xyz/host/x402-agent.kariguetoazul.workers.dev/llms.txt)