Populating Databases Automatically?

Hey, if somebody could give me some pointers on how to achieve this, I would be delighted.

Ideally, I need a way for trusted https requests to add data to a Wix database. In particular I would like to send requests from another website and my Wix site is supposed to store the associated json content. Like with a webhook?

Thanks for your help, any vague directions are appreciated.
Jona