----------------------------- **While I generate an answer, here are some sources that might be helpful**: * [Developing Locally]() * [Server Events]() * [Server URLs]() * [Tools Calling]() -----------------------------

### Answer The JSON payloads sent to your server URL for various events, such as call status updates or end-of-call reports, do not explicitly include a 'call duration' value. However, you can calculate the call duration using the timestamps provided in the call events. For instance, when a call ends, the end-of-call report will include

startedAt

and

endedAt

timestamps. By subtracting the

startedAt

timestamp from the

endedAt

timestamp, you can determine the call's duration [(1)]() . Remember, the timestamps are provided in ISO 8601 date-time format, facilitating straightforward calculation in most programming environments. For more details on the structure of the payloads for different event types and how to work with them, refer to the Server Events documentation [(2)]() .

Glad I could be helpful. Feel free to create a new thread with any new questions you may have.

I found 'secondsFromStart' on the last message from end of call report that can also be used to approximate duration of call