URLtest Outbound

{
  "type": "urltest",
  "tag": "auto",

  "outbounds": [
    "proxy-a",
    "proxy-b",
    "proxy-c"
  ],
  "url": "http://www.gstatic.com/generate_204",
  "interval": "1m",
  "tolerance": 50
}Code language: JSON / JSON with Comments (json)

In Sing-Box, an URLTest outbound is a type of outbound configuration that allows you to specify a list of outbound proxies and an URL to use for testing the connectivity and performance of those outbound proxies. The URLTest outbound will periodically send a request to the specified URL using each of the specified outbound proxies, and it will measure the response time and success rate of those requests.