{"id":"clickhouse-clickhouse-server","name":"clickhouse-server","af_score":39.2,"security_score":51.8,"reliability_score":40.0,"what_it_does":"ClickHouse Server is a high-performance columnar database system providing SQL query execution over large datasets. It offers client/server connectivity (typically via native TCP and HTTP interfaces), supports clustering/replication features, and is commonly deployed as a self-managed database service.","best_when":"You need scalable analytical querying over large volumes with high throughput, and you can operate/manage a database cluster (or a single-node deployment) effectively.","avoid_when":"You require strictly transactional semantics, strong multi-row transactional consistency, or a fully managed turnkey service with guaranteed support and SLAs.","last_evaluated":"2026-03-30T13:34:39.445916+00:00","has_mcp":false,"has_api":true,"auth_methods":["Username/password (server-side users/credentials, depending on configuration)","TLS client authentication / certificate-based auth (possible via configuration)","IP allowlists / network-level controls (often used alongside auth)"],"has_free_tier":false,"known_gotchas":["SQL execution is stateful with respect to session settings; agents may need to preserve session-level settings consistently.","Large-result queries can cause memory/network pressure; agents should add LIMITs and appropriate filters.","Schema/engine specifics (e.g., table engines, partitions, distributed tables) affect correctness and performance; agents may generate suboptimal or invalid queries without schema context.","Cluster/replication settings can change which nodes execute queries and how reads/writes behave."],"error_quality":0.0}