{"machine":"payback-period","slot":"S110","title":"Payback period","how_to_call":"POST https://innernetcorp.com/machines/payback-period with Content-Type: application/json","price_usd":"$0.003","currencies":["USDC","EURC"],"payment":"x402: send the POST without payment to receive a 402 with signed requirements; pay any option and retry.","input_example":{"investment":10000,"cash_flows":[3000,4000,4000,4000]},"input_schema":{"type":"object"},"summary":"How long until an investment pays itself back from a series of cash inflows, with fractional-year precision.","catalog":"/catalog"}