db_mcp

Read-only database exploration. Supported agents can inspect your schema and run SELECT queries against SQLite, PostgreSQL, and MySQL databases — no write access, no DDL.

Tools

Tool	Parameters	What it does
`list_tables`	`connection_string`	List all tables in the database
`describe_table`	`connection_string`, `table`	Column names, types, constraints, and indexes
`run_query`	`connection_string`, `query`	Run a SELECT query — returns rows as JSON

Connection strings

Database	Format
SQLite	`sqlite:/path/to/file.db`
PostgreSQL	`postgres://user:pass@host/db`
MySQL	`mysql://user:pass@host/db`

Connection strings can reference environment variables using a $ prefix — e.g. $DATABASE_URL. This keeps credentials out of chat history.

Only SELECT statements are allowed. INSERT, UPDATE, DELETE, DROP, and all other write operations are rejected at the tool level.