yes

its name says publishable

as long as you don't expose your secret key, you should be safe

I have NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY in vercel, but it gives me error 500

But it is gone when I add the CLERK_SECRET_KEY, why?

you need both of the keys

so its safe to put both of them in Environment Variables
?

that's what env variables are for

as long as you don't intentionally mark them as public unless needed

I see, thank you!