Grain
A fast SQL workspace for VS Code, and for the AI agents you work with.
Docs · Changelog · Report a bug ·
Potencialize seu agente
O comando do próprio publicador. Não é um endpoint do PlugMCP.
Host a copy with our keys and logs.
npx -y [email protected]O Claude Code não tem link de instalação para um comando local. Copie o comando abaixo e execute-o em um terminal.
claude mcp add grain-tools -- npx -y grain-tools@0.10.49Execute em um terminal.
{ "mcpServers": { "grain-tools": { "command": "npx", "args": [ "-y", "[email protected]" ] } }}claude_desktop_config.json
URL remota ou um comando na sua máquina? Como as duas instalações diferem
Rodar no PlugMCP
A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.
AbrirDo publicador
A fast SQL workspace for VS Code, and for the AI agents you work with.
Docs · Changelog · Report a bug ·
Standalone Grain MCP database server for VS Code, Claude Desktop, Cursor, and other MCP clients.
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.
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.
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/.
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.
Runnable queries for Postgres, MySQL,
Elasticsearch, and DuckDB, plus
agent prompts. Open any .sql file with Grain installed
and press Ctrl+Enter.
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.grain.telemetry.enabled.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).
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.
Grain is closed-source. See LICENSE.
Standalone Grain MCP database server for VS Code, Claude Desktop, Cursor, and other MCP clients.
{ "mcpServers": { "grain-tools": { "command": "npx", "args": [ "-y", "[email protected]" ] } }}Ferramentas
Ainda não há lista de ferramentas. Servidores remotos recebem uma após a primeira verificação de saúde.
Perguntas frequentes
Copie nesta página a configuração stdio para Cursor, Claude Desktop, Claude Code ou VS Code. Ela usa a instalação do publicador, não um proxy do PlugMCP.
Este registro não lista nenhuma variável de ambiente obrigatória.
Grain Tools roda localmente via stdio.
Última verificação: 2026-11-15. Standalone Grain MCP database server for VS Code, Claude Desktop, Cursor, and other MCP clients.