How to implement APIKEY validation for my api in laravel?

I am implementing an api in laravel. the api will be used by android and ios app. for accessing the api user will provide his/her credentials and server will generate access token using OAuth2 .

Now, what I want is my api should not be accessible from anywhere except from android/ios app.I googled and came to know that I can make use of API KEY.

But I am not sure is it correct way or not. Please help.

via Chebli Mohamed