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DBHub

A token-lean MCP server for PostgreSQL, MySQL, MariaDB, SQL Server and SQLite with a read-only mode

MCP serverEditors’ pickHigh risk

bytebase/dbhubAuthor: Bytebase

Install

claude mcp add --transport stdio dbhub -- npx @bytebase/dbhub@latest --transport stdio --dsn "postgres://user:password@localhost:5432/dbname"

This is third-party code. Review the repository files before installing.

What it does

DBHub connects the agent to databases through one server. By default it exposes just two tools, SQL execution and schema object search, so it takes little context. Query plans and pool health checks are opt-in, and dbhub.toml can define custom parameterized SQL tools and multiple connections. It offers read-only mode, row limits, query timeouts, SSH tunneling and TLS, plus a built-in web workbench for manual queries.

Who it is for. For developers and analysts who want the agent to explore schemas and query databases.

Good fit when

  • You need to understand the schema of an unfamiliar database
  • You need to check a query or find data while debugging
  • You need to give colleagues safe read-only database access through an agent

Not a fit when

  • Your database is not supported, for example ClickHouse
  • The agent must not reach the production database even read-only

Example request

Find the order-related tables and show how many orders came in last week

Limitations

Only PostgreSQL, MySQL, MariaDB, SQL Server and SQLite are supported. Development needs Node 22.5 or newer. The connection string with its password lands in config, so pass it via an environment variable. Without read-only mode the agent can modify data.

How to disable. Run claude mcp remove dbhub or delete the dbhub block from .mcp.json.

MCP

Transport
stdio, http
Authentication
not required

Security check

  • Runs SQL against the connected database, including writes unless read-only
  • Handles a connection string containing a password

README in short

The README explains the minimal-toolset approach and compares token use with other servers. It lists use cases, supported databases, tools, the workbench and guardrails. Install is one npx command, with other options in the docs: Docker, MCP Bundle and a Claude Code plugin. MIT licensed.

FAQ

Can I connect several databases?

Yes, connections are defined in the TOML config.

How do I keep the password out of .mcp.json?

Pass the connection string via an environment variable such as ${DATABASE_URL}.

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