What should I know to create a bot?

Question

create bot

Answer 1

Trade bot? I don't know exactly but definitely back-end stuff, like a script that automatically accepts and confirms the trade offer (input and output) with certain parameters that must be checked, like: does the trader on the website really have the item in his inventory... (information could be stored on a database with php or sql)... just some ideas.

Answer 2

There are libraries/frameworks for this ranging from SteamKit2 which is a reverse-engineered library to help access much of the Steam API and the data involved to ports of it in other languages such as node-steam for NodeJS.