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Discounted Present Value – Sequential Input-Change Attribution (Waterfall)
x402
Discounted Present Value – Sequential Input-Change Attribution (Waterfall) 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).
Performs a sequential input-change attribution (waterfall) analysis on discounted present value, showing how each input change contributes incrementally to the total change in PV.
Price / call$0.01
Success—
StatusUnknown
How this service works
Discounted present value - Sequential input-change attribution: Change each input from baseline to final in declared field order, reporting each incremental effect; order dependent. 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 sequential input-change attribution report.
Output
A JSON object containing a step-by-step sequential attribution report that shows the incremental change in discounted present value as each input (future value, annual effective rate, years) is changed from baseline to final in declared field order. Also includes the PV formula used, currency/units, and limitations of the order-dependent sequential approach.
Example use cases
Sensitivity decomposition for bond repricing
“I have a bond scenario where future value went from $500,000 to $520,000, the annual effective rate changed from 4% to 4.8%, and the term moved from 5 to 4.5 years. Run a sequential waterfall attribution on discounted present value so I can see which of those three changes drove the most PV impact.”
Explaining PV shift to a client
“My client's projections changed: future value from $50,000 to $55,000, discount rate from 6% to 7%, holding period stays at 3 years. Do a step-by-step sequential input-change attribution on the present value so I can explain exactly how much of the PV difference came from the higher cash flow versus the higher rate.”
Capital budgeting scenario comparison
“Compare two capital budgeting scenarios using a discounted present value waterfall: before is $200,000 future value at 8% over 10 years, after is $180,000 at 9% over 8 years. Show me each input's incremental effect on PV in declared field order.”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/assistant-finance-present-value-waterfall?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to understand how each individual input change — in a fixed declared sequence — contributes to the total change in discounted present value between a baseline and final scenario. It is specifically suited for waterfall/bridge chart analysis, variance attribution, and explaining PV movements to stakeholders step by step. Prefer it over a simple PV calculator when the goal is attribution and decomposition, not just a single PV result.
Side effects
- Missing required fields (future_value, annual_effective_rate_percent, or years) in before or after objects returns a validation error
- Rate values outside the allowed range (-99 to 100) or years outside (0 to 100) return a bounds error
- Future value exceeding ±1,000,000,000,000 returns a bounds error
- Malformed JSON body returns a parse error
- Payment not included or insufficient USDC (requires 0.01 USDC via x402) results in a 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| after | object | |
| before | object |
Tags
x402
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