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GoCreative Rule of 72 Calculator
x402
GoCreative Rule of 72 Calculator is a paid API for AI agents from api.gocreativeai.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-08).
Applies the Rule of 72 to calculate how many years it takes an investment to double at a given annual return rate
Price / call$0.005
Success—
StatusUnknown
How this service works
Keyless, pay-per-call compliance & regulated-data API for AI agents — OFAC wallet + sanctions/PEP + KYB screening, SEC filings, FRED economics, FDA recalls, federal awards, plus continuous monitoring. USDC on Base/Solana via x402, native MCP. No API key, no signup.
Output
Returns the annual return percentage used, the approximate integer years to double (Rule of 72 heuristic), the exact computed years to double, and a source label indicating 'computed (Rule of 72)'.
Example use cases
Example prompt
“Using the Rule of 72, how many years will it take for my investment to double if it earns 8% annually?”
Technical details
Endpoint
GEThttps://api.gocreativeai.com/v1/calc/rule72/%7Barg%7DWhen to prefer
Use this endpoint when you need a quick, classic Rule of 72 doubling-time estimate from a given annual interest or return rate, without needing complex compounding schedules or additional financial modeling.
Side effects
- Missing required 'input' query parameter returns an error
- Non-numeric or zero/negative value for annual return may produce undefined or erroneous results
- Payment of 0.005 USDC on Base required; failure to pay returns HTTP 402
Input
{
"arg": "72"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"source": "computed (Rule of 72)",
"years_to_double": 1,
"annual_return_pct": 72,
"exact_years_to_double": 0.96
}Tags
x402
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