Just the profile link, nothing else. No verification code, no connecting an app, no permissions screen asking for access to your account. X's own systems only let outside delivery reach profiles that are set to public, so if yours is locked, that has to change first, but that's an X setting, not something we control.
Pick your number between 1 and 50 yourself. The system doesn't decide for you. If 50 ever stops being enough, that's the exact point where our X (Twitter) SMM Panel takes over, with volume and delivery control the free claim was never built to offer.