@Peter Krajcik The authorization token or Bearer token is only valid for 10 minutes so if you would like to check the status of validity of the token you can simply request a new token after 10 minutes or use a retry mechanism to request a new token if the call to the speech service fails with an authorization error.
To check the status or health of your resource you can use the resource manager to implement a notification or alert mechanism with different rules and get notified for the same.