timeout attribute

Specify an amount of time in milliseconds to wait for the callback request response.

Default: 5000

Example

{
  "request": {
    "method": "GET"
  },
  "response": {
    "status": "OK"
  },
  "callback": {
    "method": "POST",
    "timeout": 2000,
    "body": {
        "message": "This request will timeout if the server does not reply in 2 seconds"
    },
    "url": "https://postman-echo.com/post"
  }
}