A2db

Name: A2db
Author: agentic-eng

@agentic-eng

Repository

About A2db

No overview available yet

#database #sql #postgresql #sqlite #mysql #mcp-server #ai-agents #read-only

Basic information

Config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "a2db": {
      "command": "uvx",
      "args": [
        "a2db-mcp"
      ]
    }
  }
}

Tools

No tools detected

We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is A2db?

A2db is an MCP server that enables batch SQL queries across multiple databases with read-only enforcement. It supports PostgreSQL, SQLite, MySQL, Oracle, and SQL Server, and allows pre-configured connections via .mcp.json. It is designed for developers and AI agents who need safe, multi-database querying from a single tool call.

How to use A2db?

Install with pip install a2db, then add to your MCP config using the command uvx with arguments to register one or more database connections. Alternatively, let the agent call login on demand — no pre-configuration is required.

Key features of A2db

Batch queries with multiple named queries in one tool call
Pre-configured database connections via .mcp.json
Default connection for all queries in a batch
Read-only enforced via SQLGlot AST parsing
Clean JSON output with TSV data and per-query timing
Supports 5 databases with all drivers bundled
Error context with column suggestions and types

Use cases of A2db

Running multiple analytical queries against different databases simultaneously
Safely querying production databases from an AI assistant without write risk
Simplifying data retrieval for reports across heterogeneous SQL databases
Batch data extraction for ETL or validation pipelines

FAQ from A2db

What databases does A2db support?

PostgreSQL, SQLite, MySQL, Oracle, and SQL Server — all drivers are bundled with the package.

How does A2db ensure read-only queries?

It uses SQLGlot AST parsing to block write statements (INSERT, UPDATE, DELETE, etc.) at the syntax level before execution.

How do I configure connections?

Add entries to your mcpServers configuration with the register command and connection string, or let the agent call the login tool on demand without prior setup.

What output format does A2db return?

A JSON envelope containing TSV-formatted data rows and per-query timing information for each batch query.

Is there a default connection option?

Yes, you can set a default connection that applies to all queries in a batch, reducing the need to specify a connection per query.

Comments

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