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Numora Annuity Calculator
x402
Numora Annuity Calculator is a paid API for AI agents from numomo.vercel.app, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-13).
Computes the present or future value of an annuity given a periodic payment amount, interest rate, and number of periods
Price / call$0.1
Success—
StatusUnknown
How this service works
100 pure math computation endpoints for AI agents. Statistics, financial math, linear algebra, equation solving, calculus, number theory, sequence generation, and unit conversions. Zero external dependencies. x402 micropayments on Base.
Output
Returns a JSON object with a success flag, a result object containing the computed annuity value (present or future value depending on the request), and a human-readable computation string describing what was calculated.
Example use cases
Retirement savings projection
“I'm contributing $800 per month into an account that earns 4% annually — what will the total annuity be worth after 30 years (360 periods) if this is an ordinary annuity?”
Loan or mortgage valuation
“Can you figure out the present value of an ordinary annuity where I receive $2,000 per month at a 6% annual rate for 20 years? I want to know what that stream of payments is worth today.”
Annuity-due vs ordinary annuity comparison
“What's the present value of an annuity-due with $500 monthly payments at a 3.5% rate over 10 years (120 periods)? I want to compare it to a standard annuity.”
Technical details
Endpoint
POSThttps://numomo.vercel.app/api/financial/annuityWhen to prefer
Choose this endpoint when you need a fast, serverless, zero-dependency annuity calculation with micropayment pricing via x402 on Base. Ideal for AI agents that need to compute time-value-of-money annuity figures (present or future value) without spinning up a financial library or calling a heavyweight financial data API. Best suited for agents doing on-the-fly financial math rather than fetching live market data.
Side effects
- Missing required fields (rate, payment, or periods) returns a validation error
- Non-numeric rate or payment values cause a 400 bad request
- Negative or zero periods may return an error or undefined result
- Invalid annuity type string may default to ordinary annuity or return an error
- Extremely large period counts or rates may cause numeric overflow
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| raterequired | number | |
| type | string | |
| paymentrequired | number | |
| periodsrequired | integer |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| resultrequired | object | Computation result varies by endpoint |
| successrequired | boolean | Always true on success |
| computationrequired | string | Human-readable description of what was computed |
Tags
x402
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