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SignalDesk AI Compound Interest Calculator
x402
SignalDesk AI Compound Interest 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 2026-10-09).
Calculates compound interest and total value given principal, annual rate, compounding frequency, and time period
Price / call$0.001
Success—
StatusUnknown
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 'total' (principal plus interest), 'interest' (the interest earned alone), and a 'notice' disclaimer clarifying the result is a pure mathematical calculation from supplied inputs with no tax, investment, or lending advice implied.
Example use cases
Savings account growth projection
“I have $25,000 in a savings account earning 4.2% per year compounded monthly — how much will I have after 5 years and how much of that is interest?”
Loan interest cost estimate
“If I take out a $50,000 loan at 6.5% annual interest compounded quarterly, how much total interest will I owe after 10 years?”
Retirement nest-egg projection
“If I invest $100,000 today at 7% annually compounded yearly, what will it be worth in 30 years when I retire?”
Technical details
Endpoint
POSThttps://x402-agent.kariguetoazul.workers.dev/api/finance/compound-interest?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a straightforward, deterministic compound interest computation from user-supplied inputs without any external data lookups or rate fetching. It is ideal for quick financial projections, educational scenarios, or building financial planning tools where the user already knows the rate and terms. It does not fetch live rates, provide advice, or handle taxes — use it purely as a math engine.
Side effects
- Missing required fields returns an error
- Values outside allowed ranges (e.g. years > 1000, rate > 1000%) are rejected
- Non-numeric inputs cause validation errors
- Zero compounds_per_year is invalid (minimum 1)
- Floating-point precision edge cases for very large principals or very long time periods
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| years | number | Elapsed years. |
| principal | number | Amount in one consistent currency; floating-point calculation, not an accounting ledger. |
| compounds_per_year | integer | Frequency. |
| annual_rate_percent | number | Supplied percentage rate, not a fetched or recommended rate. |
Output
Schema · Response
{
"type": "json",
"example": {
"total": 1104.941335558327,
"notice": "Calculation from supplied inputs only; no tax, investment or lending advice.",
"interest": 104.941335558327
}
}Tags
x402
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