How to properly accept a GET request in WordPress?

Question

WordPress

There is a site on wp and a service that sends GET requests. Actually how and where to take them correctly? Requests need to be written to the database. I see only two options:

1. Create a file at the root of the file and process everything there. There are no questions here.
   
2. Create plugin. How to implement a GET request? Or rather, what URL should be specified in the service settings, if it is a plugin?
   

Answer 1

ваш-сайт/?super-secret=some-token
then write a function on the init event - in the global $_GET you will catch
and according to the condition, do what you need