I configured an Hydra instance with my Spring Boot app. I just configured my app as a resource server using the annotation @EnableResourceServer. So, when I'm using the Bearer authorization header in my request, Spring uses the value that I specify in the property:
security.oauth2.resource.user-info-uri=...
To validate if the token is valid or not. Unfortunately, I don't find what's this URL with Hydra OAuth 2.0 (http://docs.hydra13.apiary.io/ / https://github.com/ory/hydra)