# Discounted Present Value Before-and-After Comparison Calculator

> Discounted Present Value Before-and-After Comparison Calculator is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Compares two sets of discounted present value inputs (before and after) and returns absolute and relative changes in present value.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-finance-present-value-compare?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/discounted-present-value-before-and-after-comparison-calculator-f58ad348
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IBb-vF7VfhEc1zvcD4kJT

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 discounted-present-value-before-and-after-comparison-calculator-f58ad348 -d '<json body>'
```

Example prompt: Compare the discounted present value for two scenarios: before is a future value of $12,000 discounted at 5% over 2 years, and after is a future value of $13,200 discounted at 5.5% over 2.2 years — give me the absolute and relative change.

## When to prefer this

Choose this endpoint when you need a structured, formula-backed comparison of discounted present value across exactly two scenarios (before and after), with explicit absolute and relative change reporting. It is ideal for financial planning, sensitivity analysis, or scenario modeling where a deterministic calculation with documented formula and limitations is preferred over a live market feed or advisory service.

## Known failure modes

- Missing required fields (future_value, annual_effective_rate_percent, or years) returns a validation error
- annual_effective_rate_percent outside range -99 to 100 is rejected
- years outside range 0 to 100 is rejected
- future_value outside ±1,000,000,000,000 is rejected
- Relative change may be undefined or flagged when the before present value is zero
- No live data — results depend entirely on user-supplied inputs

## How this service works

Discounted present value - Before and after comparison: Compare two supplied records, reporting absolute and eligible relative changes. Metric: Discounted present value. Supplied figures only; returns JSON with formula, units and limitations. One of 50 calculators with 20 analysis modes. No live feed, financial advice or trade execution. 0.01 USDC includes one bounded before and after comparison report.

## Output

A JSON object containing the discounted present value for the before and after scenarios, the absolute change between them, the eligible relative change (percentage), the formula used, the units assumed, and a note on limitations of the calculation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "after": {
   "type": "object",
   "default": {
    "years": 2.2,
    "future_value": 13200.000000000002,
    "annual_effective_rate_percent": 5.5
   },
   "required": [
    "future_value",
    "annual_effective_rate_percent",
    "years"
   ],
   "properties": {
    "years": {
     "type": "number",
     "default": 2,
     "maximum": 100,
     "minimum": 0,
     "description": "Amount in a consistent supplied currency and reporting period"
    },
    "future_value": {
     "type": "number",
     "default": 12000,
     "maximum": 1000000000000,
     "minimum": -1000000000000,
     "description": "Amount in a consistent supplied currency and reporting period"
    },
    "annual_effective_rate_percent": {
     "type": "number",
     "default": 5,
     "maximum": 100,
     "minimum": -99,
     "description": "Percent units: enter 5 for 5%, not 0.05"
    }
   },
   "additionalProperties": false
  },
  "before": {
   "type": "object",
   "default": {
    "years": 2,
    "future_value": 12000,
    "annual_effective_rate_percent": 5
   },
   "required": [
    "future_value",
    "annual_effective_rate_percent",
    "years"
   ],
   "properties": {
    "years": {
     "type": "number",
     "default": 2,
     "maximum": 100,
     "minimum": 0,
     "description": "Amount in a consistent supplied currency and reporting period"
    },
    "future_value": {
     "type": "number",
     "default": 12000,
     "maximum": 1000000000000,
     "minimum": -1000000000000,
     "description": "Amount in a consistent supplied currency and reporting period"
    },
    "annual_effective_rate_percent": {
     "type": "number",
     "default": 5,
     "maximum": 100,
     "minimum": -99,
     "description": "Percent units: enter 5 for 5%, not 0.05"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/discounted-present-value-before-and-after-comparison-calculator-f58ad348/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)