Elasticsearch 8.7 introduces a new Health API designed to diagnose and resolve cluster health issues by providing root cause analysis and actionable insights. Unlike the existing cluster health API, which focuses on indices and data streams, the new Health API performs comprehensive checks and reports using both high-level and detailed modes, indicated by red, yellow, or green statuses. The API uses various health indicators to track metrics such as shard availability and disk space, offering a diagnosis and step-by-step resolution guide when problems are detected. For example, the API can identify issues like unassigned shards or unsuccessful snapshot policies and suggest corrective actions. Elastic has integrated this Health API into Elastic Cloud to offer users insights into their deployment health, enabling them to address issues proactively. The API's flexibility allows for automatic step execution to resolve diagnosed problems, ensuring the overall health and functionality of Elasticsearch clusters.