DBHub MCP Server: Connect Claude to Your Database

DBHub, from Bytebase, is an MCP server that connects Claude to a relational database through a connection string. It is the example Anthropic’s own Claude Code docs use for querying a database in natural language. The project describes itself as token conscious and supports PostgreSQL, MySQL, SQL Server, Oracle, MariaDB and SQLite.

Install in Claude Code

Use a read-only database user in the DSN:

claude mcp add --transport stdio db -- npx -y @bytebase/dbhub \
  --dsn "postgresql://readonly:pass@host:5432/analytics"

Run /mcp and check that the db row shows a checkmark. To share the setup with a team, add it at project scope and reference the DSN through an environment variable in .mcp.json rather than committing the password. The MCP guide explains scopes and variable expansion.

Use cases

What's our total revenue this month?
Show me the schema for the orders table
Find customers who haven't made a purchase in 90 days

• Exploring an unfamiliar schema before writing a feature.
• Ad-hoc analytics without opening a SQL client.
• Checking that a migration Claude wrote produces the expected data.
• Pair with the SQL explainer prompt to review queries before running them.

Pros

• One server for six database engines.
• Open source (MIT) and documented in Anthropic’s own examples.
• Works in any MCP client.

Cons

• Powerful against real data: always use least-privilege credentials.
• Query results enter Claude’s context, so large result sets cost tokens.
• Not a substitute for a migration tool or reviewed SQL in production paths.