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Schemabrain MCP Server

@Arun-kc

リポジトリ

基本情報

カテゴリ

データベース

トランスポート

stdio

作者

Arun-kc

投稿者

arunkc

Schemabrain MCP Server について

A read-only trust + intelligence layer between AI agents and your database — the agent never writes SQL, PII is refused before the query runs, and every call lands in a tamper-evident audit log. Postgres today.

#mcp#database#security#postgres#pii#data-governance#audit#semantic-layer

Schemabrain MCP Server の設定

以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。

{
  "mcpServers": {
    "schemabrain": {
      "command": "uvx",
      "args": [
        "schemabrain",
        "serve",
        "--url-env",
        "DATABASE_URL"
      ],
      "env": {
        "DATABASE_URL": "postgresql://user:password@localhost:5432/dbname"
      }
    }
  }
}

Schemabrain MCP Server のツール

ツール一覧はまだありません

この掲載には表示できるツール一覧がまだありません。サーバーにツールがないという意味ではありません。対応機能はプロジェクトのドキュメントをご確認ください。

上のボタンで一時的なサンドボックスでこのサーバーを実行し、ツール一覧を取得できます。

概要

What is Schemabrain?

Schemabrain is an MCP server that acts as a read-only trust and intelligence layer between AI agents (Claude, Cursor, Windsurf) and your SQL database. It compiles SQL from definitions you control and refuses queries touching blocked categories before the database is queried.

How to use Schemabrain?

Install Schemabrain using the uvx package manager. It sits between an AI agent and a Postgres database. Twelve read-only MCP tools are available; the agent never writes SQL directly.

Key features of Schemabrain

  • Read-only architecture — 12 MCP tools, none can write.
  • PII-aware refusal — blocked-category queries are rejected before hitting the database.
  • Tamper-evident audit — SHA-256‑chained append‑only log of every call, refusal, and recovery.
  • Postgres support today; Apache‑2.0 licensed.
  • Simple installation via uvx.

Use cases of Schemabrain

  • Letting AI agents query a production database without risk of writes.
  • Preventing accidental or malicious PII extraction from the database.
  • Maintaining an immutable, verifiable audit trail of all agent queries.
  • Enforcing data-access policies through category-based refusal rules.

よくある質問

1

Is Schemabrain read-only?

Yes. All 12 MCP tools are read-only by architecture. The agent never writes SQL; SchemaBrain compiles SQL from definitions you control.

2

How does Schemabrain handle PII?

It maintains a set of blocked categories. Any query touching a blocked category is refused before the database is queried.

3

What database does Schemabrain support?

Currently only Postgres.

4

Is there an audit log?

Yes. Every call, refusal, and recovery is recorded in a SHA-256-chained append-only log that is tamper-evident.

5

How do I install Schemabrain?

Install using `uvx`.

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