Requirements
What do tier-1 exchanges check before listing a token?
The same things, in a different order.
A legal entity and KYB on the founders. A completed smart contract audit from a recognised firm. Tokenomics with a vesting schedule the exchange can read. Evidence of a community and a working product. And a Market Maker, named in the application, because the exchange wants to know the book will be there on day one.
Binance's own listing application asks for all of these. The full list, with what each item takes to prepare, is in Binance listing requirements.


