Does anyone know of an account checker?
Maybe with a Cape Checker.
What exactly do you mean by account checker?
A program where you can create a Minecraft Acc. List check can (see if they go) and where you can automatically check if the Acc. Have Optifine Capes.
You can look up the names and name history on de.namemc.com. But with Optifine-Cpae I don't think so