You can add multiple URLs by adding commas to separate them if needed.
URL1,URL2
example :
http://arduino.esp8266.com/stable/package_esp8266com_index.json,URL2
3. Click Tools -> Board -> Boards Manager
4. Enter keyword "esp8266" in the search box to make it easier for you. If you have found esp8266 by ESP8266 Community, in the Antares documentation using version 3.1.2 and then click Install.
