What do you mean exactly by "USDT derivatives"? This will facilitate the process to find solutions suitable to your need.
He's probably taking about USDT perpetual swaps, but he's not specific on which particular derivatives exchange he requires the API data from.This is what i was expecting. I just wanted to improve op explaining his query in simple words.
Beyond installing an API then being asked by a beginner (seems to be) seems to be so risky to do. Op maybe is asking here because he can't hire someone so just to make sure that he already understand well what he is asking for and how to deal this.
Edit: I wonder why B.Arena deleted his reply in which he tried to help me figure out what op is about to say (see quote).
I just hope that it wasn't deleted by mods after being reported, there are no reasons also. By mistake is the best case
