API post vs get

Question

If an API uses GET method, can I also use it with POST? Or do they need totally different implementation on server side?

Answer 1

depend on implementation usually yes.
GET only be used to fetch the data, no data altering, no wrting, just read
POST is used to send and write a new data, so usually its protected an need authorization

not every api like this though

Answer 2

Same route can be for GET and POST requests, create difference controllers to handle difference methods.

Answer 3

It depends on API. API like JSON placeholder gives you POST methods. But what your post will not stored in their database. I think. Most of the API does not give you permission to POST.