Using references here:
micropython networking:
https://forum.micropython.org/viewtopic.php?t=1940
https://github.com/micropython/micropython/tree/master/examples/network
ajax example: https://forum.micropython.org/viewtopic.php?t=1033
https://github.com/RinusW/WiPy/tree/master/AiCWebserver
micropython post https://github.com/balloob/micropython-http-client
post on micropython https://community.home-assistant.io/t/http-post-with-micropython-and-an-esp8266/3484