Two-factor authentication (2FA) protects against unauthorized access to your account by confirming your identity using:
something you know (such as your username and password)
something you have (such as a phone or tablet)
When you enable 2FA, we will prompt you for a unique one-time password when you perform certain actions on your account or on packages to which you have write access, depending on your 2FA configuration.
Note: Two-factor authentication provides the best possible security for your account against attackers. We strongly recommend enabling 2FA on your account as soon as possible after you sign up.
Two-factor authentication modes on npm
Two-factor authentication on npm can be enabled for authorization only, or authorization and writes.
Authorization only
If you enable 2FA for authorization only, we will request a one-time password for certain authorized actions.
Action
CLI command
Log in to npm
npm login
Change profile settings (including your password)
npm profile set
Change 2FA modes for your user account
npm profile enable-2fa auth-only
Disable 2FA for your user account
npm profile disable-2fa
Authorization and writes
If you enable 2FA for authorization and writes, we will request a one-time password for certain authorized actions, as well as write actions.