Auto-accepting trade offers by following rules:
* Steam trading cards only (common or foil, not emoticons nor backgrounds)
* The same number of cards on per-game basis (1:1 / 3:3 / 7:7 etc)
* No trade hold (Mobile Authenticator on)
* advances (A A -> A B , good)
* doesn't change (A B -> A C , neutral)
i.e. do not break completing sets ( A C -> A A , bad).

Beggars (1:0) and abusers (1$:1c, trades for marketable pricier cards just for profit without intention to complete their set) will be blocked and reported.

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Feel free to add me for easier finding needed cards via game badge pages. Nowadays third-party services like STM can't refresh user inventories as often as before due to new Steam inventory limits since Autumn 2022.

SteamTradeMatcher link [www.steamtradematcher.com]

Direct trade link

Also, list of useful tools:
https://asf.justarchi.net/STM
https://github.com/Rudokhvist/ASF-STM
https://github.com/Mr-VIT/SteamWebTools
https://github.com/SteamDatabase/BrowserExtension
https://github.com/IsThereAnyDeal/AugmentedSteam