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Sindri Compound Interest Calculator
x402
Sindri Compound Interest Calculator is a paid API for AI agents from x402.outpimp.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Projects the ending value of an investment given a starting principal, monthly contributions, and an annual interest rate compounded monthly over a chosen number of years.
Price / call$0.01
Success—
StatusUnknown
How this service works
Compound interest calculator. Projects the ending value of an investment given a starting principal, monthly contributions, and an annual interest rate, compounded monthly over a chosen number of years.
Output
Returns the projected ending value of the investment after the specified number of years, computed using monthly compounding on both the initial principal and the recurring monthly contributions.
Example use cases
Retirement savings projection
“I'm 35 and want to retire at 65. If I put $15,000 in today and add $600 a month at a 6% annual return, how much will I have in 30 years?”
College fund growth estimate
“I'm starting a college fund with $2,000 and plan to add $150 a month. Assuming a 5% annual interest rate, what will it be worth in 18 years?”
Early FIRE milestone planning
“If I invest $50,000 now and contribute $1,000 a month at 8% annual interest compounded monthly, what will my portfolio be worth after 15 years?”
Technical details
Endpoint
POSThttps://x402.outpimp.com/compoundInterestCalculatorWhen to prefer
Choose this endpoint when you need a fast, affordable ($0.01 USDC) server-side compound interest projection with monthly compounding and recurring contribution support. Ideal for financial planning agents that need accurate future-value calculations without implementing the math locally. Prefer this over a Coast FIRE or Emergency Fund calculator when the user wants a straightforward investment growth projection rather than a specific FIRE milestone or expense runway.
Side effects
- Missing required parameters (years, initialInvestment, annualInterestRate, or monthlyContribution) may return an error or incomplete result
- Out-of-range values (e.g. years > 100 or negative amounts) may cause unexpected results
- Payment failure via x402 protocol (insufficient USDC balance) will prevent the call from completing
- Providing annualInterestRate as a percentage (e.g. 7 instead of 0.07) will yield incorrect projections
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| years | number | Number of years to project (1-100). |
| initialInvestment | number | Starting principal. |
| annualInterestRate | number | Annual interest rate, as a fraction (e.g. 0.07). |
| monthlyContribution | number | Recurring monthly contribution. |
Tags
x402
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