{"machine":"roi-calc","slot":"S57","title":"ROI calculator","how_to_call":"POST https://innernetcorp.com/machines/roi-calc with Content-Type: application/json","price_usd":"$0.001","currencies":["USDC","EURC"],"payment":"x402: send the POST without payment to receive a 402 with signed requirements; pay any option and retry.","input_example":{"initial":10000,"final":15000,"years":3},"input_schema":{"type":"object"},"summary":"Compute return on investment: total ROI percent, absolute gain and annualized return (CAGR) if years given.","catalog":"/catalog"}