Hello, is there way to secure Suitelet external URL pages ?

Be specific by what you mean by secure

@battk Since Suitelet External doesn't have login access so, I'm trying to explore, we can host this external url to protect.

Dont know what that means

If Restlet with TBA isn't an option. Would HMAC signed with a shared secret work. Not to say it's the right solution but for example Shopify uses this technique with web hooks.