REST API calls for 3rd party application

We currently work with a 3rd party who takes care of our moderation. They have an account that is setup with REST API read/write access. This account is used alongside their platform to make REST API calls - they pick up on all of our posts, including those that have been put through the Lithium Spam Quarantine.

These means that moderation is being duplicated, the Lithium Spam Quarantine is proficient and picking up on the main Community posts that need to be moderated, meaning that the 3rd party do not need to have a view of this content. What we would like to happen is that the Spam Quarantine is the first layer of moderation and the 3rd party pick up on everything else that that hasn't been hidden by the Spam Quarantine.

We would like our 3rd party moderators to carry out a REST API call that pulls back everything within our Community except from content that has already been picked up by the Spam Quarantine. Is there a REST API call that exists to differentiate the difference in posts that have been hidden and those that have not? Not sure if this is possible or if anyone is able to provide any further advice in relation to other potential solutions.