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Jarroba Tools

128 deterministic tools for your AI: logs, tests, SQL, diagrams, SPARQL. Local, no network.

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Jarroba Tools — MCP servers

Source of the @jarroba/mcp family of MCP servers: deterministic tools for AI agents that run on your machine and upload nothing. The packages and their documentation are in mcp/.

The tools reuse the engines of jarroba.com/tools: they live under src/app/, with the same layout as in the web app, so that the code here is the code that runs there.

This repository is a read-only mirror, generated from the private repository of Jarroba Tools at each release. Issues are welcome; pull requests cannot be merged here.

Build and test

npm install            # engines' dependencies (root)
cd mcp && npm install
npm run build && npm test && npm run test:paquete

License: MIT (see LICENSE). Third-party notices ship in each package's dist/.

Installation

Source-derived launch command. Check the maintainer’s required arguments and credentials before running:

bash
npx -y @jarroba/mcp

Set up in your AI client

Merge this template into ~/Library/Application Support/Claude/claude_desktop_config.json. Keep existing servers. Add any arguments, credentials, and permissions required by the maintainer; this template has not been install-tested.

json
{
  "mcpServers": {
    "io-github-invarato-jarroba-tools": {
      "command": "npx",
      "args": [
        "-y",
        "@jarroba/mcp"
      ]
    }
  }
}

Restart Claude Desktop completely for changes to take effect. Confirm the server appears connected in the client’s tool list, then try a read-only example from its documentation.

Claude Desktop setup reference

Package

@jarroba/mcpnpm

Compatible MCP Clients

Jarroba Tools works with any MCP-compatible client. Copy the config snippet from the Configuration section above and add it to the file shown for your client, then restart the application.

  • Claude Desktop~/Library/Application Support/Claude/claude_desktop_config.jsonRestart Claude Desktop completely for changes to take effect.
  • Cursor~/.cursor/mcp.jsonRestart Cursor for changes to take effect.
  • VS Code.vscode/mcp.jsonReload VS Code window for changes to take effect.
  • Windsurf~/.codeium/windsurf/mcp_config.jsonRestart Windsurf for changes to take effect.
  • Claude Code.mcp.jsonSave at the project root, then start Claude Code in that project and review the MCP server approval prompt. Keep real credentials out of shared files.

Learn More

BigQuery MCP Server: Set Up the Prebuilt ToolboxA complete configuration path for BigQuery Toolbox: project prerequisites, credentials, binary selection, prebuilt arguments, and a read-first connection check.Read articleSQLite MCP Server: Query a Local Database From ClaudeSQLite is the simplest database to hand an AI agent, since the whole thing lives in one file. This guide walks through picking a SQLite MCP server from the directory, configuring it in Claude Desktop, and the permission tradeoffs worth knowing before you let an agent write to your data.Read articleMongoDB MCP vs Redis MCP: Which Fits Agent Memory?MongoDB and Redis both ship official MCP servers, but they solve different problems for AI agents. Here's a data-backed comparison of auth models, tool coverage, and which one fits agent memory versus persistent storage.Read article