Please advise where to start to understand the OneBox API

if you already understand what GET, POST, DELETE are, it will be useful to watch this couple of videos: https://www.youtube.com/watch?v=A_jGdrGRLd0 https://www.youtube.com/watch?v=n0VCq-yfxYA

I'm also interested in this question, to be honest. Vyacheslav, thank you for sharing these useful sources. I'll need this. Yes, I love to read, learn something new and interesting. Recently I started playing video games, but before that I definitely read the reviews on this source https://onlinegamersreviews.com/bayonetta-game-director-hideki-kamiya-leaves-platinumgames/ The information on this site is really impressive. I mean that here you can find out a lot of details regarding a particular game. Moreover, video game experts write openly and transparently about both the advantages and disadvantages. The last thing I read was about a game director and it's so interesting.