Today I can connect to ClickHouse and run queries through Custom Health, but the integration is difficult to manage. ClickHouse’s HTTP query endpoint expects raw SQL in the POST body or as a URL query parameter, while Harness Custom Health appears to expect a JSON POST body. Because of this, I have to URL-encode the SQL and pass it as a GET/query parameter in the Harness UI. I also have to write SQL that shapes the result into Harness-specific JSON instead of mapping native query result columns to CV fields. For example, a native integration should allow users to configure the endpoint, auth, database, query, timestamp column, value column, serviceInstance column, and optional grouping/metric fields. For enterprise use, the current workaround is fragile and hard to manage across many services and CV queries. Without native ClickHouse support, teams may need ETL jobs or custom wrappers just to make ClickHouse data usable for CV.