Where to find the proper Lingq api documentation?

[rafarafa]

There is none.

Url and docs for 3.0 API?

AFAIK the two APIs (v2 & v3) exist side-by-side. Depending on what you want to do, you will have to call both APIs. I have asked LingQ multiple times to provide documentation, but it has been deemed low priority and v3 was introduced 1.5 years ago; in short, don’t think this is going to happen. To be fair most parts of the v2 API are undocumented as well. Things seem to work mostly for me, but I only use it for primitive tasks like up/downloading, getting statistics and updating my lessons. No…

Your best bet is to click on F12, inspect the Network tab, and look at what requests are sent.

You could also check this GitHub - daxida/lingq: Lingq scripts for automated editing