I kept building the same two things in every project. Then I realised why.

Every Web3 project I have shipped has had the same two hidden costs.

The first: a system to make my application know who its users are. Address validation per chain. Multi-wallet merge logic. A lightweight profile layer. I built this in every project because it doesn't exist in the stack underneath.

The second: a system to give that identity any meaning. A reputation layer — something that says not just who the user is, but what they've done, whether they can be trusted, what their track record looks like. Also missing from the stack. Also rebuilt from scratch every time.

The missing infrastructure is an identity OS combined with a reputation layer. A permanent on-chain name that maps to every address across 17 chains, carrying the user's full on-chain history underneath it.

Endless Domains is that infrastructure. One resolver call. Your application gets the identity and can query the reputation attached to it.

The two things I kept building from scratch: solved.
That's what an operating system does.