Deekard

Deekard (Midplane) is an MCP server that acts as a policy and audit layer for Postgres databases, deciding what queries autonomous agents can execute. It prevents dangerous or unapproved operations (such as mass deletions) at parse time and provides column-level masking to redact sensitive data before it leaves the database. Designed for teams using AI/agent-driven database access, Deekard lets you define table and column access policies, logs every decision, and supports deployment both as a hosted service and self-hosted solution.