----------------------------- **While I generate an answer, here are some sources that might be helpful**: * [Create Assistant]() * [Create Phone Call]() * [Update Assistant]() * [List Assistants]() -----------------------------

### Answer To know when a call has ended using Vapi, you can utilize the feature in the API that sends server messages at different stages of the call. When the call ends, your server will receive an

end-of-call-report

message among other possible server messages detailed in the API documentation [(1)]() . Here is how you can set up your assistant to send these server messages to your server URL, including the end of call report:

json
{
  "serverUrl": "https://yourserver.example.com/path",
  "serverMessages": ["end-of-call-report", "status-update", "hang", "tool-calls"]
}

This configuration ensures that at the end of a call, your server receives detailed information about the call, including the reason it ended, which is specified in the

end-of-call-report

. Make sure your server endpoint is prepared to handle these incoming POST requests to process the call data accordingly.

Got it. Tagging @User for additional help.