Enter your API key with permission public access only to start using Torn market.

Public Only: This API key can only access your account's information which is already public. The Public Only key provides no additional account information that anyone's API key can't already access.

Your API key will only be used to validate your profile and later can be used to fetch your bazaar and display cabinet items unless you want to share it with the website to fetch other users bazaar and display cabinet info

Go to this page to generate API key: https://www.torn.com/preferences.php#tab=api