Send form p5.js data from domain page to ESP8266 webserver

i have a p5.js speech recognition program hosted on a domain page. I want to send the regnised words to a esp8266 webser through an android browser running on a diffferent isp service,\

. the ip for the domain page is different and the the esp8266 web server is on a local ip and the private isp is on a different ip. how to configure so tha dat reaches the esp8266 web server