{"uid":"cap_npGCHEEkSL5KyM9uDLHBn","slug":"gocreative-rule-of-72-calculator-bdafe580","name":"GoCreative Rule of 72 Calculator","description":"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.","url":"https://api.gocreativeai.com/v1/calc/rule72/%7Barg%7D","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"pathParams":{"type":"object"},"queryParams":{"type":"object","required":["input"],"properties":{"input":{"type":"string","description":"endpoint argument"}}}},"additionalProperties":false}}},"responseSchema":null,"example":{"request":{"arg":"72"},"response":{"source":"computed (Rule of 72)","years_to_double":1,"annual_return_pct":72,"exact_years_to_double":0.96}},"exampleRequest":{"arg":"72"},"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_vUpqqKnjTd2l6Os2tXpPv","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Applies the Rule of 72 to calculate how many years it takes an investment to double at a given annual return rate","exampleAgentPrompt":"Using the Rule of 72, how many years will it take for my investment to double if it earns 8% annually?","exampleUseCases":null,"resultDescription":"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)'.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-08T19:12:48.219Z","isFirstParty":false}