How to access a proxy without product entitlement?

[#1]

We have a new requirement to create a proxy and the user should be able to access the proxy without having entitlement to it. That is, no new product is required for that proxy and developer app will not have any reference to that product. All users will be authenticated using the Basic auth - Consumer key and secret. The Bearer token will be used to hit the proxy. Without authorization, the developer app should access the proxy.

Scenario :-

New Proxy - "Proxy-B1" is created.

Developer App "A" wants to hit "Proxy-B"

Product "B1-Product" created for proxy "Proxy-B"

Developer App "A" - Generates Bearer token using Basic auth and hits "Proxy-B" URL using bearer token and should able get the response.

(Note: Developer App "A" will not have product mapping for "Proxy-B". Developer App "A" should be able to hit "Proxy-B1" without entitlement)

How to achieve this? Can any one help on this please.