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Vextorium Savings Plan Calculator
x402
Vextorium Savings Plan Calculator is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-19).
Calculates the full trajectory of a savings or investment plan with monthly contributions, compound interest, inflation adjustment, yearly evolution, and goal-based monthly contribution target.
Price / call$0.003
Success—
StatusUnknown
How this service works
232 pay-per-call data APIs for AI agents: official statistics and economy (ECB, Fed, Eurostat, World Bank, SEC, BOE, INE), crypto prices and sentiment, Spanish public data, compliance (sanctions, VAT, IBAN, LEI), science, weather, web and developer tools and local AI text tools. Pay in USDC via x402.
Output
Returns a JSON object with: final_value (total portfolio value at end of period), total_contributed (sum of all monthly contributions), interest (total interest/returns earned), final_value_in_todays_money (inflation-adjusted final value), evolution (array of year-by-year snapshots showing year, value, and total contributed to date), for_target (object with the target amount and the required_monthly_contribution to reach it), and a note about assumptions.
Example use cases
Retirement nest egg projection
“I have $10,000 saved already and plan to put away $600 a month for 25 years at a 7% annual return. Assuming 3% inflation, what will my portfolio be worth at the end, how much of that is interest, and what's it worth in today's money? Also show me how it grows year by year.”
College fund monthly target
“I want to save $80,000 for my kid's college fund over 18 years, with an expected 5% annual return. I can start with $2,000 now — how much do I need to contribute each month to hit that goal, and what would the account look like at the end?”
Short-term savings goal simulation
“If I put $250 a month into a savings account for 5 years with a 4% annual return and no initial capital, how much will I end up with, how much of that is interest, and what's the real value after 2% inflation?”
Technical details
Endpoint
POSThttps://api.vextorium.com/v1/savings-plan?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a full financial projection of a recurring savings or investment plan, including compound interest, inflation-adjusted real value, year-by-year growth, and goal-based contribution planning — all in a single call. Prefer it over generic calculator tools when you need the complete picture: total contributed vs. interest earned, real vs. nominal value, and backward-looking goal calculation (required monthly amount to reach a target).
Side effects
- Missing required fields (monthly_contribution, years, annual_return_pct) returns validation error
- Negative or zero values for years or return percentage may produce nonsensical results
- Extremely high inflation_pct values relative to return may yield near-zero real values
- No target provided means for_target block will be absent or null
- Network timeout if upstream calculation service is unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| years | number | |
| target | number | |
| inflation_pct | number | |
| initial_capital | number | |
| annual_return_pct | number | |
| monthly_contribution | number |
Output
Schema · Response
{
"type": "json",
"example": {
"note": "Constant return assumed; real markets vary. No taxes or fees.",
"interest": 44894.86,
"evolution": [
{
"year": 1,
"value": 3525.31,
"contributed": 3400
},
{
"year": 2,
"value": 6202.13,
"contributed": 5800
}
],
"for_target": {
"target": 100000,
"required_monthly_contribution": 213.46
},
"final_value": 93894.86,
"total_contributed": 49000,
"final_value_in_todays_money": 63188.55
}
}Tags
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