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db-conn-mcp

MCP Server

A dead-simple, self-hosted MCP server for securely querying databases via AI agents.

2Databases

Install

claude mcp add db-conn-mcp -- uvx db-conn-mcp

What is db-conn-mcp?

A dead-simple, self-hosted MCP server for securely querying databases via AI agents.

Trust

79/100 · Good

2 factors scored below maximum

Documentation

README · ~7 min read

db-conn-mcp

GitHub stars

A dead-simple, self-hosted Model Context Protocol (MCP) server for querying your databases with AI agents (Claude, Cursor, Windsurf, VS Code, Zed, and more).

It does one thing well: let an agent safely explore and query a database you point it at — with security delegated to the simplest possible primitives (a static JSON file and your database's own read-only transactions), not custom auth servers or fragile SQL parsing.

v1 ships PostgreSQL only. All database-specific code lives behind a Dialect seam, so adding MySQL/SQLite later is a single new file.

Why

  • Read stays read. A read database runs every query in a native read-only transaction, and the read tool only accepts a single read-only statement (SELECT/WITH/VALUES/TABLE/SHOW/EXPLAIN) — so an agent can't slip in a write or a SET … READ WRITE to flip the session. For a hard, privilege-level guarantee that holds no matter what, point the DSN at a read-only database role (see Use a read-only role).
  • No secret leaks. DSNs/passwords are never logged or returned by any tool. Connection failures come back as sanitized diagnostics (a category + fix), never a raw traceback with your host and credentials in it.
  • Tiered write safety. Writes are gated server-side: mode (hard, native) → yolo (per-database trust) → user_consent (explicit per-operation approval).

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