curl -X POST "https://api.bland.ai/v1/calls/call_123456/listen" \
  -H "Authorization: YOUR_API_KEY"

const response = await fetch('https://api.bland.ai/v1/calls/call_123456/listen', {
  method: 'POST',
  headers: {
    'Authorization': 'YOUR_API_KEY'
  }
});

const data = await response.json();
console.log(data.data.url); // WebSocket URL

import requests

url = "https://api.bland.ai/v1/calls/call_123456/listen"
headers = {"Authorization": "YOUR_API_KEY"}

response = requests.post(url, headers=headers)
data = response.json()
print(data["data"]["url"])  # WebSocket URL

{
  "status": "success",
  "data": {
    "url": "wss://api.bland.ai/ws/listen/call_123456"
  },
  "errors": null
}

{
  "status": "error",
  "data": null,
  "errors": [
    {
      "error": "INVALID_ORG_PREFERENCES",
      "message": "Org preferences do not allow live listening"
    }
  ]
}

{
  "status": "error", 
  "data": null,
  "errors": [
    {
      "error": "CALL_NOT_FOUND",
      "message": "Call not found"
    }
  ]
}

{
  "status": "error",
  "data": null, 
  "errors": [
    {
      "error": "INVALID_CALL_STATUS",
      "message": "Call is not in progress"
    }
  ]
}

{
  "status": "error",
  "data": null,
  "errors": [
    {
      "error": "CALL_NOT_FOUND", 
      "message": "Call was either not found or not started"
    }
  ]
}