THis is not a thing.
You need to do this yourself because apartments go quickly. You need to have all your paperwork ready with a handful of cash.
Yes it's cutthroat. But NYC real estate has always been this way.
The minute someone tells you about an apartment it's likely gone.

AnD things are much more cutthroat because landlords all use this software to collude with each other to keep rent prices artifically high, the DOJ is already investigating this. It's called RealPage.
https://www.propublica.org/article/yieldstar-realpage-rent-doj-investigation-antitrust