VolvoEngineering

Are you sure? This shouldn't be possible. Steam caches classid+instanceid pairs indefinitely. The description data should never change.
Not really, my best guess is that D just stands for "data". It very likely is a hash to prevent scraping.
It's been my experience that any [SM], A, D triplet will work forever to fetch item data.

Hello, i am beginner in node js programming and i have created atmost few tradebots, so the idea is that in order to maintain and scale my float bot i have to buy many private proxies that include both login and password, but the problem is that such proxies are quite expensive and harm my ROI, so the question is whether it is possible to send request not from private proxies, but from public one and to get data from endpoints that for example render 10 first listings on the itempage, and if so, then what module or instrument should i use? Thank you in advance

GetTradeHistory does appear to accept an access token to retrieve all trades.