Hi Team, ListenURL and ControlURL have stopped coming in get call output. I am sure everyone who uses this would be facing this issue. Thanks, Karun

If

listenUrl

and

controlUrl

are missing from your call response, double-check that you are sending a POST request to the

/call

endpoint as shown below, since these URLs should be returned in the

monitor

object:

bash
curl 'https://api.vapi.ai/call' \
  -H 'authorization: Bearer YOUR_API_KEY' \
  -H 'content-type: application/json' \
  --data-raw '{
    "assistantId": "YOUR_ASSISTANT_ID",
    "customer": { "number": "+12345678913" },
    "phoneNumberId": "YOUR_PHONE_NUMBER_ID"
  }'

If the URLs are still missing, this may indicate a backend or configuration issue—please review your request and contact support if the problem persists. Source: [Vapi Call Features Documentation](https://docs.vapi.ai/calls/call-features)

Hi Karun, To start using the live call control features, you'll need to send a POST request to the

/call

endpoint to obtain the

listenUrl

and

controlUrl

. Here's a brief overview of the process: 1. **Initiate a Call**: Send a POST request to

https://api.vapi.ai/call

with the required details like

assistantId

,

customer

number, and

phoneNumberId

.

bash
   curl 'https://api.vapi.ai/call' \
   -H 'authorization: Bearer YOUR_API_KEY' \
   -H 'content-type: application/json' \
   --data-raw '{ "assistantId": "YOUR_ASSISTANT_ID", "customer": { "number": "CUSTOMER_NUMBER" }, "phoneNumberId": "PHONE_NUMBER_ID" }'

2. **Retrieve URLs**: The response will include the

listenUrl

and

controlUrl

within the

monitor

object. 3. **Perform Call Control Operations**: Once you have the

controlUrl

, you can post JSON data to control the call, inject messages, or end it. For example, to make the assistant say a message:

bash
   curl -X POST 'CONTROL_URL/control' \
   -H 'content-type: application/json' \
   --data-raw '{ "type": "say", "content": "Your message here." }'

For more detailed instructions, check the [Live Call Control documentation](https://docs.vapi.ai/calls/call-features). If you need to stream audio, you can connect to the

listenUrl

using a WebSocket as covered in [WebSocket Transport](https://docs.vapi.ai/calls/websocket-transport).