How to validate opaque access_token in Spring Boot no client_secret

I am sending tokens received form our Org Authorization server and am trying to validate them via the introspect endpoint. I have been able to do this manually by sending a POST request and adding the required query parameters but I am wondering if there is a way to simplify this using the Okta Spring Boot library or some Spring library.

I have tried several things with the okta-spring-boot-starter but an unable to get it to work without having to provide a client_secret.

Has anyone attempted to do this before or does this just have to be done manually?