{"machine":"invoice-total","slot":"S112","title":"Invoice line-item totalizer","how_to_call":"POST https://innernetcorp.com/machines/invoice-total 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":{"items":[{"description":"Design","qty":10,"unit_price":50},{"description":"Hosting","qty":1,"unit_price":200,"discount_percent":10}],"tax_percent":18},"input_schema":{"type":"object"},"summary":"Total an invoice from line items (qty × unit price), with per-line and invoice-level discount and tax - returns the full computed invoice.","catalog":"/catalog"}