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MCP Toolbox for Databases

MCP Toolbox for Databases

by Google
Released
12 views
v1.8.0
Apache-2.0
Repository Docs
Featured Databases & DataCloud & Infrastructure

Summary

Google's open-source MCP server for enterprise databases — one binary that fronts AlloyDB, BigQuery, Spanner, Postgres, MySQL, Oracle, MongoDB, Snowflake and more.

Features

  • One MCP server across AlloyDB, BigQuery, Spanner, Postgres, MySQL, Oracle, MongoDB, Snowflake and more
  • Custom tools declared in YAML, so agents get scoped queries instead of arbitrary SQL
  • Automatic connection pooling and integrated authentication
  • Built-in OpenTelemetry metrics and tracing
  • Interactive --ui console for testing tools before wiring an agent

Installation

Set up this MCP server in your favorite AI agent — copy a ready-made configuration below.

Any MCP-compatible agent

Most agents (Claude, Cursor, Windsurf, VS Code, and more) read a standard mcpServers configuration.

  1. Open your agent's MCP configuration file.
  2. Merge the snippet below into it.
  3. Restart the agent — the "MCP Toolbox for Databases" tools will be available.
{
  "mcpServers": {
    "mcp-toolbox-databases": {
      "command": "toolbox",
      "args": [
        "--tools-file",
        "tools.yaml",
        "--stdio"
      ]
    }
  }
}

Description

Giving an agent database access usually means one MCP server per engine, each with its own auth story and its own idea of what a "query" tool looks like. MCP Toolbox is Google's answer to that: a single Go binary, configured by a YAML file, that fronts a long list of databases behind one MCP endpoint.

It works two ways. Prebuilt toolsets get an agent querying an existing database immediately. The custom-tools framework is the more interesting half — you declare each tool in tools.yaml with its own source, parameters and SQL, so the agent gets a narrow, reviewable surface ("look up an order by id") instead of arbitrary SQL execution against production. Tools group into toolsets, and prompts can be declared alongside them.

Sources span Google Cloud — AlloyDB, BigQuery, Cloud SQL for PostgreSQL, MySQL and SQL Server, Spanner, Firestore, Knowledge Catalog — and a wide set of everything else: PostgreSQL, MySQL, MariaDB, SQL Server, Oracle, MongoDB, Redis, Elasticsearch, CockroachDB, ClickHouse, Couchbase, Neo4j, Snowflake and Trino.

Operationally it behaves like a server rather than a script: automatic connection pooling, integrated authentication so access is scoped rather than shared, and built-in OpenTelemetry metrics and tracing. A --ui flag opens an interactive console for exercising tools before an agent ever calls them, and client SDKs exist for Python, JavaScript/TypeScript, Go and Java for use outside MCP.

Apache-2.0 licensed. Install via Homebrew (brew install mcp-toolbox), a released binary, npm, or the published container image.

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