VVertex Password Protect CPTs adds a password field to the editor for public WordPress post types.

When a password is configured, visitors who open that singular item on the front end must enter the correct password before the page is rendered.

Features

Adds a password protection meta box to public post types.
Supports posts, pages, and public custom post types.
Protects only content where a password has been configured.
Keeps successful access unlocked for two hours.
Stores a derived verification token in the visitor cookie instead of the raw password.
Sends no content or visitor data to external services.
Includes no advertising, tracking, or remote code.

Important scope note

The plugin protects direct singular front-end requests handled by the normal WordPress template flow. It does not attempt to restrict data exposed separately through custom REST endpoints, custom API integrations, feeds, archives, search implementations, or third-party code.