Open-source MCP server from Google for connecting agents to databases including AlloyDB, BigQuery, Cloud SQL, Spanner, PostgreSQL, MySQL, SQL Server, MongoDB and more. Offers prebuilt tool sets via --prebuilt or custom tools defined in tools.yaml, with connection pooling and IAM auth.
Also available as
Connect
- 1Add the server to Codex
codex mcp add mcp-toolbox-databases --env POSTGRES_HOST=YOUR_POSTGRES_HOST --env POSTGRES_PORT=YOUR_POSTGRES_PORT --env POSTGRES_DATABASE=YOUR_POSTGRES_DATABASE --env POSTGRES_USER=YOUR_POSTGRES_USER --env POSTGRES_PASSWORD=YOUR_POSTGRES_PASSWORD -- npx -y @toolbox-sdk/server --prebuilt=postgres --stdio
Configs are generated from the publisher's documented endpoint. Check their docs for plan requirements and scopes. New to this? Read the step-by-step tutorial.
Tools 10
execute_sqllist_tableslist_schemaslist_viewslist_indexeslist_active_queriesget_query_plandatabase_overviewlist_lockslist_query_statsThings to ask
- “List the tables in my Postgres database”
- “Show the slowest queries right now”
- “Explain the query plan for this SELECT”
- “Which tables are most bloated?”