Create your own spreadsheet/database for your client. Send end-of-call-report to your server. Extract this info: message.phoneNumber.number = Vapi phone number (to track clients) message.call.id = call ID Set a wait step of around 15 seconds GET request to api.vapi.ai/call/{call ID} Extract this info from GET request: endedAt startedAt (you can include transcript, summary and more if you want) endedAt - startedAt = accurate call length Accurate call length X your usage pricing = Call cost to customer Then send all the info to a database or spreadsheet