Anomaly Detection API

Hi, I've created an Anomaly Detection job which I'm wanting to integrate into one of our playbook orchestration tools (XSoar).

In short, when triggered i want to pull the current anomaly score from the job for the specific site that has triggered (this would relate to the field splitting in the anomaly job).

It looks like the Get Buckets API would be close to what i need, however i can't see how to target the specific split bucket rather than the overall bucket?