Trade API

Hello,

I tried to build a little script to get trade information, but I always get a 403.

Have there been significant changes to the API as also the scripts I find online won't work anymore and are more than 5 years old?

Is there any helpful guide out there as the official reference (https://www.pathofexile.com/developer/docs/reference) is not really helpful and doesn't mention the trade API at all (at least I didn't find anything).

Greetings
Paraan