How does Imagify work (webp generation)

Hello,

I am pretty happy with how Imagify works for WordPress. In fact, I’d like to replicate its behaviour on another site that uses a custom script. Now I wonder, how does Imagify work exactly?

Like, I know I have to use the API, and I found the documentation, but the docs only say that images are going to be optimized. So I wonder what else happens.

Is Imagify creating webp with Imagick/GD and send it to the API or how would I have to imagine its internal magic?

I mean if it’s a secret, you could also tell me if the API supports webp as an image format. Or if that’s even necessary to have webp optimize. Wink wink, nudge nudge. ??

Thank you ??
-Alduin