CartGuard

Stop products from being bought until you say so. Add one tag and CartGuard blocks checkout. Free for every Shopify store.

Tag to block. Add a tag such as no-checkout to any product and customers can browse it but not buy it.
Cannot be bypassed. The rule runs inside Shopify checkout, so scripts, apps, and direct API calls are blocked too.
Your message, your rules. Block by tag, product type, or template, and customize the message shoppers see.