<p>Creates a listener for the specified Application Load Balancer, Network Load Balancer, or Gateway Load Balancer.</p> <p>For more information, see the following:</p> <ul> <li> <p> <a href="https://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-listeners.html">Listeners for your Application Load Balancers</a> </p> </li> <li> <p> <a href="https://docs.aws.amazon.com/elasticloadbalancing/latest/network/load-balancer-listeners.html">Listeners for your Network Load Balancers</a> </p> </li> <li> <p> <a href="https://docs.aws.amazon.com/elasticloadbalancing/latest/gateway/gateway-listeners.html">Listeners for your Gateway Load Balancers</a> </p> </li> </ul> <p>This operation is idempotent, which means that it completes at most one time. If you attempt to create multiple listeners with the same settings, each call succeeds.</p>

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}