QueryBear

Gives Claude read-only access to your Postgres, MySQL, or SQLite databases without risking a rogue DROP TABLE. You get two MCP tools: get_schema to surface your tables and relationships, and run_query to execute SQL. QueryBear sits in the middle enforcing column-level visibility rules and logging every query with full attribution. Useful when you want Claude to answer questions like "why did user 4821's payment fail" or "who signed up this week" by hitting production data directly. The remote server handles schema detection and relationship mapping automatically. Works with managed databases like Supabase, Neon, PlanetScale, and RDS without extra configuration.