[keycloak-user] Revocation Policy

Hiya In regard to revocation policies or the ability to revoke access tokens. Does keycloak only provide this feature as a push model? ... Glancing at documentation and a quick google the implementation seems to be a back channel callback to the url with I guess some verifiable payload? .. Is there any other means to request this information .. I can't see anything in the rest api but essentially I'd like periodically check if any tokens has been revoked. Rohith