Grain SQL

Name: Grain SQL
Author: pattrnlabs

作者：pattrnlabs版本 0.10.49i★ –i在你的电脑上运行

注册名称io.github.pattrnlabs/grain

安装

概览

作者提供的说明（英文原文）

Run SQL queries and inspect database schemas through safe, visible MCP tools.

PopNx MCP 的三大支柱

这三项永远不会合并成一个分数：意见、测量和人气是不同的东西。

用户评价i暂无评价评价功能将在后续阶段与账户功能一起开放
我们的基础检查i1 项中通过 1 项依据公开信息检查；尚未扫描代码
使用情况i尚未统计★ –

它能帮你做什么

我们还没有为它写通俗的介绍。下面是我们从注册中心读取到的事实。

连接方式: 在你的电脑上运行
传输方式: stdio
分类: 数据库与数据集
你需要填写：GRAIN_CONNECTIONS

安装

选择你使用的 AI 应用，然后复制设置。

安装之前

基础检查：1 项中通过 1 项
在你的电脑上运行，拥有你的用户账户的权限（文件、网络、应用）。
需要你自己填写： GRAIN_CONNECTIONS, GRAIN_MCP_SAFE_MODE, GRAIN_MAX_ROWS

标为机密的值是你账户的钥匙。千万不要分享给别人，也不要粘贴到聊天里。

你需要

npm已安装 Node.js（用于 npx 命令）

你用的是哪个应用？

ClaudeClaude CodeCursorVS CodeChatGPT

在上方选择你的应用。我们会记住它，下次按钮会显示“安装到 …”。

打开 Claude Desktop → Settings → Developer → Edit Config，把下面的内容粘贴到 claude_desktop_config.json

{
  "mcpServers": {
    "grain": {
      "command": "npx",
      "args": [
        "-y",
        "grain-tools"
      ],
      "env": {
        "GRAIN_CONNECTIONS": "your-value",
        "GRAIN_MCP_SAFE_MODE": "your-value",
        "GRAIN_MAX_ROWS": "your-value"
      }
    }
  }
}

在终端中运行这条命令

claude mcp add grain --env GRAIN_CONNECTIONS=your-value --env GRAIN_MCP_SAFE_MODE=your-value --env GRAIN_MAX_ROWS=your-value -- npx -y grain-tools

运行前请先填写空着的值。

在 Cursor 中打开

或者自己复制设置

粘贴到项目中的 .cursor/mcp.json，或 ~/.cursor/mcp.json

{
  "mcpServers": {
    "grain": {
      "command": "npx",
      "args": [
        "-y",
        "grain-tools"
      ],
      "env": {
        "GRAIN_CONNECTIONS": "your-value",
        "GRAIN_MCP_SAFE_MODE": "your-value",
        "GRAIN_MAX_ROWS": "your-value"
      }
    }
  }
}

浏览器会先询问是否打开应用，然后应用会显示设置并请你确认。密钥的值会留空，由你自己填写。

在 VS Code 中打开

或者自己复制设置

粘贴到项目中的 .vscode/mcp.json

{
  "servers": {
    "grain": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "grain-tools"
      ],
      "env": {
        "GRAIN_CONNECTIONS": "your-value",
        "GRAIN_MCP_SAFE_MODE": "your-value",
        "GRAIN_MAX_ROWS": "your-value"
      }
    }
  }
}

浏览器会先询问是否打开应用，然后应用会显示设置并请你确认。密钥的值会留空，由你自己填写。

这个服务器在你的电脑上运行，而 ChatGPT 只能连接互联网上的服务器。请选择其他应用。

你的选择通过 Cookie 保存在这台设备上，无需账户。

需要你填写的值

GRAIN_CONNECTIONS 机密 env
JSON array of Grain connection profiles for headless use.
GRAIN_MCP_SAFE_MODE env
Set to false to allow mutating SQL. Defaults to true.
GRAIN_MAX_ROWS env
Maximum rows returned by query tools. Defaults to 10000.

这些设置是根据作者在注册中心的条目生成的。如果 README 的写法不同，请以 README 为准。

它能做什么

它在你的电脑上运行；安装后，工具列表会显示在你的 AI 应用中。

基础检查i

我们检查的是任何人都能看到的信息；我们没有阅读代码。不适用的检查项不计入总数。 · 检查于 2026年11月7日

✓ 通过
作者与仓库一致
注册名称已通过 GitHub 账户 pattrnlabs 验证，该账户拥有此仓库
… 尚未检查
仍在维护
我们还没有从 GitHub 读取这个仓库
… 尚未检查
有许可证
我们还没有从 GitHub 读取这个仓库
– 不适用
端点有响应
它在你的电脑上运行，没有互联网端点
– 不适用
使用 OAuth 登录
在你的电脑上运行，改用本地设置
… 尚未检查
工具描述中没有隐藏指令
它在你的电脑上运行；我们只能读取互联网端点的工具列表

与“数据库与数据集”中的其他服务器比较i

星标数多于此分类中其他 953 个服务器的 0%
发布到注册中心的时间比此分类中其他 953 个服务器的 96% 更新
基础检查结果等于或优于此分类中其他 953 个服务器的 100%

与注册中心里这个分类中所有活跃的服务器比较。只有当发布者拥有该仓库时，星标数才计入。

常见问题

Grain SQL 安全吗？

它在 1 项适用的基础检查中通过了 1 项。我们没有阅读代码。在添加密钥或令牌之前，请先看看这个服务器要求哪些权限，并使用只具备所需权限的密钥。

它需要哪些密钥或代码？

你需要填写：GRAIN_CONNECTIONS

它在我的电脑上运行还是在云端？

它在你的电脑上运行。你的 AI 应用会在需要时启动它，数据不会经过作者的服务器（除非它自己调用在线服务）。

它还在维护吗？

GitHub 仓库最后更新于–，最新版本（0.10.49）于前天进入注册中心。

哪些应用可以使用它？

支持 MCP 的应用，例如 Claude Desktop、Claude Code、Cursor 和 VS Code。你的电脑上还需要有 Node.js。

有什么可以替代它？

同一分类中有：Supabase, MongoDB MCP Server, Elasticsearch MCP Server

替代选择

同一分类中其他作者的服务器，按星标数排序。

如何看卡片：★ GitHub 星标i三大支柱：评价 · 检查 · 使用情况i更新 = 最新版本发布到注册中心的时间i

Supabase

作者：supabase

MCP server for interacting with the Supabase platform

电脑或云端★ 2,993Apache-2.0今天更新

安装

MongoDB MCP Server

作者：mongodb-js

MongoDB Model Context Protocol Server

在你的电脑上运行★ 1,157Apache-2.0前天更新

安装

Elasticsearch MCP Server

作者：cr7258

MCP server for interacting with Elasticsearch

在你的电脑上运行★ 315Apache-2.014个月前更新

安装

作者的 README

打开 README

按原文从作者的仓库复制。PopNx MCP 没有审查或背书其内容。HTML、图片和脚本已被移除。链接会离开本站。

Grain

A fast SQL workspace for VS Code, and for the AI agents you work with.

Docs · Changelog · Report a bug · Ask a question

Run SQL from any .sql file with Ctrl+Enter and get the results in a sortable grid inside VS Code. Passwords stay in your OS keychain, and Grain has no hosted service.

Quick start

Install Grain from the VS Code Marketplace or Open VSX (for Cursor, Windsurf, and VSCodium).
Open a folder in VS Code. Grain adds its demo files there.
Open the Grain panel and click Try the Demo.
Put your cursor in any query in the file that opens and press Ctrl+Enter (Cmd+Enter on macOS).

The demo reads two CSV files through Grain's built-in DuckDB connection, so there's nothing to set up. To query your own database, run Grain: Manage Connections, add a profile, and test it before you save.

If Grain is useful to you, a star on this repo helps other developers find it.

Use Grain from an AI agent

Grain can serve your database connections to Claude Code, Cursor, and GitHub Copilot over MCP. Agents get read-only access by default, and every query an agent runs shows up in your Grain results panel, so you can see exactly what it did.

MCP is off until you turn on grain.mcpEnabled in settings. Setup steps for each client are in the MCP docs, and example prompts are in examples/agents/.

Features

Feature	What it does
Run from the editor	`Ctrl+Enter` runs the file; Run Query Under Cursor runs one statement; Run Query in New Tab keeps the previous result
Non-blocking queries	Queries run in a background process, so a slow query doesn't freeze VS Code
Connection manager	Create, test, and switch database profiles without editing JSON
Result grid	Sort, filter, and resize columns, see each column's SQL type, copy a selection as TSV
Full export	The grid shows the first 500 rows; export re-runs the query and writes every row to CSV, TSV, or JSON
Agent access over MCP	Claude Code, Cursor, and Copilot can query your connections; their results land in your panel
Remote setups	Works over WSL, dev containers, GitHub Codespaces, and Remote - SSH

Supported databases

Relational databases

PostgreSQL

MySQL

SQL Server

SQLite

Data warehouses

Snowflake

BigQuery

Query engines & lakehouses

Trino / Presto

DuckDB

Elasticsearch

Through Trino or Presto you can query your cluster's Iceberg, Delta Lake, and Hive tables. DuckDB queries local CSV and Parquet files directly.

PostgreSQL and Trino / Presto are bundled with the extension. The others load their driver on first use, and if a driver is missing, Grain tells you what to install.

Need another database? Request a connector. Requests with the most 👍 get built first.

Examples

Runnable queries for Postgres, MySQL, Elasticsearch, and DuckDB, plus agent prompts. Open any .sql file with Grain installed and press Ctrl+Enter.

Privacy

Your SQL, results, and passwords stay on your machine. Passwords are stored in VS Code Secret Storage, backed by your OS keychain, and never in a settings file.
Agents are read-only by default. With grain.mcpSafeMode on (the default), agents can only run SELECT, SHOW, DESCRIBE, EXPLAIN, WITH, and metadata queries. Agents can't read stored passwords or change saved connections.
Telemetry is anonymous. Grain sends usage data that never includes SQL, results, credentials, hostnames, or schema names. Turn it off with grain.telemetry.enabled.

FAQ

Is Grain open source?\ No. Grain is closed-source. This repo holds the issue tracker, docs, and examples.

Which databases does it support?\ The nine listed above. To ask for another one, request a connector.

Do my queries or passwords leave my machine?\ No. There's no Grain server. Queries go straight from VS Code to your database, and passwords stay in your OS keychain. See Privacy for what the anonymous telemetry does and doesn't include.

How do I connect Claude Code or Cursor?\ Turn on grain.mcpEnabled, then follow the steps for your client in the MCP docs.

Why does my database show a driver error?\ Some connectors load their driver on first use. The error message names what to install. If it's still failing after that, file a bug report with the Output panel logs (View → Output → Grain).

Getting help

Bug: file a bug report
Feature idea: file a feature request
New database: request a connector
Question: check the FAQ and docs, then ask a question

We don't have a fixed roadmap yet. What we build next depends a lot on what people ask for here, especially connector requests. See CONTRIBUTING.md for how to file a good issue.

Star History

License

Grain is closed-source. See LICENSE.